The elimination method was used to solve the following system of equations:
x2 – y = –3
x2 + y2 = 9
Which of the following is the correct y-coordinate of the solution? (5 points)
0
1
3
-4
Answers
Answer:
(c) 3
Step-by-step explanation:
You want the y-value of the solution to the equations ...
x² -y = -3x² +y² = 9EliminationWe are interested in the value of y, so it can be useful to eliminate x from the equation(s). The x² term appears in both, so it is convenient to subtract the first equation from the second.
(x² +y²) -(x² -y) = (9) -(-3)
y² +y = 12
y² +y -12 = 0 . . . . . . subtract 12
(y +4)(y -3) = 0 . . . . . factor
y = -4 or +3 . . . . . . . . values that make the factors zero
DomainSolving the first equation for y, we find ...
x² +3 = y . . . . . . . add y+3
We know that x² cannot be negative, so this tells us the values of y will be ...
y ≥ 3
Of the two solutions we found above, the value -4 is extraneous (not in the domain of y).
The y-coordinate of the solution is 3, choice C.
__
Additional comment
The solution is the point of intersection of the two curves shown in the attachment. The y-coordinate of that point is 3.
<95141404393>
Related Questions
a jet travels 470 miles in 5 hours at this rate how far could the jet fly in 8 hours
Answers
Jet could fly a distance of 752 miles in 8 hours if it travels at the same rate.
What is Speed?Speed is defined as the unit rate in terms of distance travelled and the time taken to travel the distance.
Speed has only magnitude and no direction and therefore is a scalar quantity.
Given that,
a jet travels 470 miles in 5 hours.
Distance travelled = 470 miles
Time taken to travel the distance = 5 hours
Speed of the jet = 470 miles / 5 hours = 94 miles per hour
Given that jet is travelling at the same rate. So the speed is constant.
We have to find the distance travelled in 8 hours.
Let d be the distance.
Speed = Distance / Time
Distance = Speed × Time
d = 94 × 8
d = 752 miles
Hence the distance travelled is 752 miles in 8 hours.
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A game store salesman had $3,500 in total monthly sales last month. He made $175
in commission from those sales.
What is the salesman's commission as a percent of his total monthly sales?
1. 3%
2. 4%
3. 5%
4. 6%
Answers
Answer:
4.6%
Step-by-step explanation:
3500+175 = 3675
(175/3675)×100 = 4.6%
Name at least two independent variables that could result in a change in a monthly electric bill
Answers
The two independent variables that could result in a change in a monthly electric bill will be Product physical dimensions and Machine operators' skill level.
What is a function?A function is an assertion, concept, or principle that establishes an association between two variables. Functions may be found throughout mathematics and are essential for the development of significant links.
Independent variables are variables that do not depend on anything.
Dependent variables are variables that depend on the independent variables.
The independent variables in the electric bill are as follows:
Product physical dimensionsMachine operators' skill level.Non-production machines that use electricity, among other thingsThe two independent variables that could result in a change in a monthly electric bill will be Product physical dimensions and Machine operators' skill level.
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A construction worker places 60 bricks to make a wall. If he places 6 bricks in each column, how many columns are there?(1 point)
Answers
Answer:
10 columns
Step-by-step explanation:
[tex]\frac{60}{6}=10[/tex] columns
Ann borrowed $8000 at a rate of 15%, compounded annually. Assuming she makes no payments, how much will she owe after 6 years?
Answers
Answer:
Ann will owe $15,258.23 after 6 years, assuming she makes no payments.
What is Compound Interest ?
Compound interest is a method of calculating interest on a loan or investment, where interest is earned on both the initial principal amount and on any interest that has already been earned. In other words, interest is added to the principal, and then interest is calculated on the new total amount (the principal plus the previously earned interest). This results in the interest earned growing exponentially over time.
According t o given condition :
To calculate the amount Ann will owe after 6 years, we can use the formula for compound interest:
A = P(1 + r/n)^(n*t)
where:
A = the amount Ann will owe after 6 years
P = the initial principal amount borrowed, which is $8000 in this case
r = the annual interest rate as a decimal, which is 15% or 0.15
n = the number of times interest is compounded per year, which is once annually in this case
t = the number of years, which is 6 in this case
Plugging in these values, we get:
A =
A =
A = $15,258.23
Therefore, Ann will owe $15,258.23 after 6 years, assuming she makes no payments.
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All digits in a dropdown number are different and one of its digits is the average of all its digits. It has at least two digits. For example, 5021 is a dropdown number, but neither 4389 nor 6033 is a dropdown number. How many 3 digit dropdown numbers are there?
Answers
Answer:
112
Step-by-step explanation:
You want the number of 3-digit "dropdown numbers".
Dropdown numberA "dropdown number" has distinct digits, one of which is the average of all digits.
We can count the number of dropdown numbers by considering the digit that is the average of the rest. For that digit (n), the number of possible choices of the other digits is the lesser of (n) or (9-n). For example, for n=2, we can have other digit pairs of (0, 4) or (1, 3). For n=6, we can have other digit pairs of (5, 7) or (4, 8) or (3, 9).
CountingThe value of n may range from 1–8, inclusive, so the number of digit triples will be 2(1 +2 +3 +4) = 20. Each triple of digits can be arranged 6 ways, for a total of 20·6 = 120 numbers of 3-digits.
Of those, 8 numbers will have a leading 0, so may not count as 3-digit numbers. That leave a total of 120 -8 = 112 3-digit dropdown numbers.
__
Additional comment
The first 5 in numerical order are ...
102, 120, 123, 132, 135
The last 5 are ...
957, 963, 975, 978, 987
In general, a number on the list, m, has a corresponding number 999-m also on the list. The exceptions are numbers that have a leading digit of 0.
Point value: 15
Please HELP!
Answers
Answer:
There are three terms in the given expression.
Step-by-step explanation:
First, a term is a single individual value on which mathematical operations occur in an algebraic expression. Essentially, terms are every part of an expression that is separated by any mathematical operation, such as PEMDAS. In the expression [tex]\frac{v}{3} -4*2[/tex], [tex]\frac{v}{3}[/tex], -4, and 2 are all terms. Therefore, there are three terms in the given equation.
Have a great day! Feel free to let me know if you have any more questions :)
What is the simplified value of the expression
Answers
The simplified value of the expression is,
⇒ [tex]\frac{1}{\sqrt[5]{3} }[/tex]
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The expression is,
⇒ [tex]\frac{(\sqrt[3]{3} )^{3/5} }{(\sqrt[3]{3} )^{6/5} }[/tex]
Now, We can simplify by the rule of exponent as;
⇒ [tex]\frac{(\sqrt[3]{3} )^{3/5} }{(\sqrt[3]{3} )^{6/5} }[/tex]
⇒ [tex](\sqrt[3]{3} )^{3/5} }{(\sqrt[3]{3} )^{- (6/5)} }[/tex]
⇒ [tex](\sqrt[3]{3} )^{3/5 - 6/5[/tex]
⇒ [tex](\sqrt[3]{3} )^{-3/5[/tex]
⇒ [tex]\frac{1}{\sqrt[3]{3} ^{ 3/5} }[/tex]
⇒ [tex]\frac{1}{\sqrt[5]{3} }[/tex]
Thus, The simplified value of the expression is,
⇒ [tex]\frac{1}{\sqrt[5]{3} }[/tex]
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Meginnis corporation's relevant range of activity is 3,000 units to 7,000 units. When it produces and sells 5,000 units, its average costs per unit are as follows:.
Answers
As per the concept of average, the cost of producing 6,000 units is $79,200.
The average, also known as the mean, is a mathematical representation of a set of data. It is calculated by adding all the values in the set and dividing the result by the number of values in the set.
When it comes to calculating the total amount of direct manufacturing cost incurred when 6,000 units are produced, it is important to use the average cost per unit. To do this, we need to multiply each average cost per unit by the number of units produced.
The total direct manufacturing cost incurred can be calculated as follows:
Direct materials = $5.20 * 6,000 = $31,200
Direct labor = $3.75 * 6,000 = $22,500
Variable manufacturing overhead = $1.65 * 6,000 = $9,900
Fixed manufacturing overhead = $2.60 * 6,000 = $15,600
The total direct manufacturing cost incurred is $79,200.
Complete Question:
Meginnis Corporation's relevant range of activity is 3,000 units to 7,000 units. When it produces and sells $5,000 units, its average costs per unit are as follows:
Average Cost per Unit
Direct materials $5.20
Direct labor $3.75
Variable manufacturing overhead $1.65
Fixed manufacturing overhead $2.60
Fixed selling expense $0.50
Fixed administrative expense $0.40
Sales commissions $1.50
Variable administrative expense $0.50
If 6,000 units are produced, the total amount of direct manufacturing cost incurred is closest to:
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Triangle ABC is similar to triangle FGH. Given the following angle measures, find the missing angle measures.
m∠A = 22 degrees
m∠B = 75 degrees
Enter your answers as numbers only.
m∠F = _____ degrees
m∠G = _____ degrees
m∠H = _____ degrees
m∠C = _____ degrees
Answers
The missing angle measures are:
m∠F = 22 degrees
m∠G = 75 degrees
m∠H = m∠C = 83 degrees
m∠C = 83 degrees
The angle measuresSince triangles ABC and FGH are similar, their corresponding angles are equal. Therefore:m∠F = m∠A = 22 degrees
m∠G = m∠B = 75 degrees
m∠H = m∠C, since they are corresponding angles, but we still need to find the measure of m∠C.
To find m∠C, we can use the fact that the sum of the angles in a triangle is always 180 degrees. So:m∠A + m∠B + m∠C = 180 degrees
Substituting the given values, we get:22 degrees + 75 degrees + m∠C = 180 degrees
Simplifying, we get:m∠C = 180 degrees - 22 degrees - 75 degrees = 83 degrees
Therefore, the missing angle measures are:
m∠F = 22 degrees
m∠G = 75 degrees
m∠H = m∠C = 83 degrees
m∠C = 83 degrees
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which terms are used to describe events that have NO outcomes in COMMON?
Answers
Events that have no outcomes in common are said to be disjoint or mutually exclusive.
Two sets are known to be mutually exclusive when they have no common elements. Mutually exclusive events are those that cannot take place at the same moment.
If two events are considered disjoint events, then the probability of both events occurring at the same time will be zero.
Set A = {2, 4, 6, 8, 10, 12, 14, 16}
Set B = {1, 3, 5, 7, 9, 11, 13, 15}
A and B do not have any numbers in common, so P (A ∩ B) = 0. Therefore, A and B are mutually exclusive.
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During the month of May, the sheriff's department issued 130 traffic tickets for speeding or failure to obey traffic signals. The fine for each speeding ticket
was $67.00, and each fine for failure to obey traffic signals was $67.00. The sheriff's department collected $8,710.00 in fines from these two offenses.
Which system of equations can be used to determine the number of speeding tickets given, x, and the number of tickets given for failure to obey traffic
signals, y?
Answers
Answer: The number of speeding tickets issued is represented by x and the number of tickets for failure to obey traffic signals is represented by y. The total number of tickets issued is 130, so we have:
x + y = 130
The total amount of money collected in fines is $8,710.00, so we have:
67x + 67y = 8710
These two equations form a system of linear equations that can be used to determine the number of speeding tickets, x, and the number of tickets for failure to obey traffic signals, y. To solve this system, we can use any of the methods for solving a system of linear equations, such as substitution, elimination, or matrices.
Step-by-step explanation:
Diane pays $3.84 for a bag of 16 tangerines.
Find the unit price in dollars per tangerine.
If necessary, round your answer to the nearest cent.
Answers
[TRUE or FALSE] finding a parametric description of the solution set of a linear system is the same as solving the system.
Answers
The statement is false. The solution set of a linear system can only be expressed using a parametric equation if the system has at least one solution.
Equation of this sort is known as a parametric equation; it uses an independent variable known as a parameter (commonly represented by t) and dependent variables that are specified as continuous and independent of other variables functions of the parameter Multiple parameters may be utilized as needed.For example, the following equation can be represented as a pair of equations in parametric form rather than the equation in Cartesian form: Parameterization, It effectively differentiates and integrates curves by converting a function into parametric form.
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ASAP!!! How do I solve this
Complete the equation of the circle that includes the points (-5,4), (3,4), and (3,0)
Answers
The equation of circle is ( x + 1 )² + ( y - 2 )² = 20
What is a Circle?A circle is a closed two-dimensional figure in which the set of all the points in the plane is equidistant from a given point called “center”. Every line that passes through the circle forms the line of reflection symmetry. Also, the circle has rotational symmetry around the center for every angle
The circumference of circle = 2πr
The area of the circle = πr²
where r is the radius of the circle
The standard form of a circle is
( x - h )² + ( y - k )² = r²,
where r is the radius of the circle and (h,k) is the center of the circle.
The equation of circle is ( x - h )² + ( y - k )² = r²
For a unit circle , the radius r = 1
x² + y² = r² be equation (1)
Now , for a unit circle , the terminal side of angle θ is ( cos θ , sin θ )
Given data ,
Let the points on the circle be A ( -5 , 4 ) , B ( 3 , 4 ) and C ( 3 , 0 )
Now , the equation of the circle is of the form
ax + by + c = x² + y²
Substituting the values in the equation , we get
-5a + 4b + c = 41 be equation (1)
3a + 4b + c = 25 be equation (2)
3a + c = 9 be equation (3)
Subtracting equation (2) from equation (1) , we get
-8a = 16 be equation (4)
Divide by -8 on both sides of the equation , we get
a = -2
Substitute the value of a in equation (3) , we get
3 ( -2 ) + c = 9
-6 + c = 9
c = 15
Substitute the value of a and c in equation (2) , we get
-6 + 4b + 15 = 25
4b + 9 = 25
4b = 16
b = 4
So , the value of a , b and c are -2 , 4 and 15 respectively
Now , the equation of circle will be
-2x + 4y + 15 = x² + y²
On simplifying the equation , we get
x² + y² + 2x - 4y - 15 = 0
( x² + 2x + 1 ) - 20 + ( y² - 4y + 4 ) = 0
So , the equation will be
( x + 1 )² + ( y - 2 )² = 20
Hence , the equation of circle is ( x + 1 )² + ( y - 2 )² = 20
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What are the equations of the
asymptotes of the functions
f(x) =1/x-5 +3? What are the
domain and range?
Answers
Step-by-step explanation:
I am in class 7 If I know I tell you I am go to ask my teacher
Answer:
Domain:(−∞,5)∪(5,∞),{x|x≠5}
Range:(−∞,3)∪(3,∞),{y|y≠3}
Step-by-step explanation:
??????
find missing value
i rlly need help thanks
Answers
The missing value using concept of similar triangle ratio is; 35
How to find the length of similar triangles ?Similar triangles are defined as triangles that have the same shape, but their sizes may vary. All equilateral triangles, squares of any side lengths are examples of similar objects. In other words, if two triangles are similar, then their corresponding angles are congruent and corresponding sides are in equal proportion.
Using the concept of similar triangles on the given diagram, we have;
p/(30 + 20) = 14/20
p = (14 * 50)/20
p = 35
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What is an equation of the line that passes through the point (5,-8) and is parallel to the line 5x-4y=16
Answers
Answer:
To find the equation of the line that passes through the point (5,-8) and is parallel to the line 5x-4y=16:
1. Identify the slope of the original line (m = 5/4).
2. Use the point-slope formula: y - (-8) = (5/4)(x - 5).
3. Simplify the equation.
4. The equation is y + 8 = 5/4(x - 5), or 5x - 4y = 16.
While shopping after her birthday, Annie bought 2 pairs of jeans and 3 shirts and spent $127. Her twin sister Hallie bought the same items consisting of 1 pair of jeans and 4 shirts and spent $116 how much does one pair of jeans cost and how much does a shirt cost
Answers
Let's use j for the cost of one pair of jeans and s for the cost of one shirt.
From the problem, we know that:
2j + 3s = 127 (Annie's purchase)
1j + 4s = 116 (Hallie's purchase)
We can use these two equations to solve for j and s. One way to do this is to use substitution. Solving one of the equations for one of the variables and then substituting that expression into the other equation, we get:
j = 116 - 4s (from the second equation)
2(116 - 4s) + 3s = 127 (substituting into the first equation)
Simplifying and solving for s, we get:
232 - 8s + 3s = 127
-5s = -105
s = 21
Now that we know the cost of one shirt is $21, we can substitute that value back into one of the equations to solve for j:
1j + 4(21) = 116
1j + 84 = 116
1j = 32
Therefore, one pair of jeans costs $32.
So, the cost of one pair of jeans is $32 and the cost of one shirt is $21.
Answer:
The shirt costs $21
Step-by-step explanation:
2x + 3y = 127 ....eq 1
Her twin sister Hallie bought 1 pair of jeans and 4 shirts for $116.
So, x + 4y = 116 ....eq 2
Multiplying eq 2 by 2, we get :
2x + 8y = 232 ....eq 3
Subtracting eq 1 by eq 3, we get :
(2x + 8y) - (2x + 3y) = 232 - 127
5y = 105
Thus, y = 21
Putting this value of y in eq 2, we get :
x + 4(21) = 116
x = 116 - 84 = 32
Therefore, the cost of a pair of jeans = x = $32
And the cost of a shirt = $21
WILL MARK BRAINLIEST drag and drop the discriptions into the box to correctly classify each pair of number angles each may be used more then once
Answers
Answer: 1 and 2 = vertical
3 and 4 = adjacent
I need some help with my homework
Answers
Answer:
c
Step-by-step explanation:
c
Answer:
A
Step-by-step explanation:
Write the number
five million four thousand three hundred
in standard form.
Answers
The required five million four thousand three hundred in standard form is 5,004,300.
What is a number system?A number system is described as a technique of composing to represent digits. It delivers a special presentation of every digit and describes the arithmetic structure.
Here,
In the question, we are asked to write the word of the number five million four thousand three hundred in standard form.
So,
five million four thousand three hundred = 5,004,300
Since
1 million = 1000, 000
1 thousand = 1000
1 hundred = 100
Thus, the required five million four thousand three hundred in standard form is 5,004,300.
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Quadrilateral ABCD is similar to Quadrilateral WXYZ.
1) What is the scale factor using ABCD as the pre-image?
2) What is mZC?
3) What is mZZ?
4) What is AD?
Scale factor=
-10
m/XYZ =$7.47*
XY = 2.5 units
10
m B 5 units
N
0
B
Ws
A
WZ 3 units
D
m/CDA 75.96*
10
Answers
Answer:
Step-by-step explanation:
ur mom
1) The scale factor is 1:2
2) The measure of angle C is equivalent to 67.17
3) The measure of angle Z is equivalent to 75.96
4) AD=6 units
Explanation:
1) We’re given the measurements of XY(2.5) and BC(5), which we know are similar. We can then divide 2.5/5 and conclude that the scale factor is 1/2.
2) We’re given the measurement of angle XYZ, which is also the measurement of angle y. Since angles in similar triangle are equivalent, if y(67.17)=c, then c must be equal to 67.17.
3) This is the same concept as number 2.
4) We know that WZ=AD. Since we’re given WX(3 units), we can use the scale factor to create an equation. 3/x=1/2. Then, we cross multiply. x=6, x=AD, AD=6
How many solutions does the system of liner equations represented in the graph
Answers
Answer:
Infinite solutions
Step-by-step explanation:
There are an infinite number of solutions. If you have a system of linear equations, the solution for the system is the value that makes all of the equations true. For two variables and two equations, this is the point where the two graphs intersect.
What is an equivalent expression for 27+3x
Answers
The equivalent expression is 81 + 9x
What is an algebraic expression?An algebraic expression is simply defined as an expression that is composed of terms, variables, coefficients, factors and constants.
They are also made up of arithmetic operations like subtraction, division, addition, multiplication, bracket and parentheses.
Equivalent expressions are defined as expressions with the same solution but which differs in the mode of their arrangement.
From the information given, we have that;
27+3x
Multiply the values by 3 each, we get;
81 + 9x
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Solve for x provide proofs pleaseee
Answers
Answer:
x = ~4.40 or [tex]\sqrt{19.37}[/tex]
Step-by-step explanation:
This is a right triangle, so we will use the Pythagorean Theorem.
The theorem goes as follows: [tex]a^2 + b^2 = c^2[/tex]
Let's set x as the a value in the theorem. Plug in 6.8 for b, and 8.1 for c.
[tex]x^2 + (6.8)^2 = (8.1)^2[/tex]
Then, simplify!
[tex]x^2 + 46.24 = 65.61[/tex]
Subtract 46.24 on both sides.
[tex]x^2 = 19.37[/tex]
Take the square root of both sides
[tex]x =\sqrt{19.37}[/tex]
Voila!
An airplane covers 2 124 kilometres in 6 hours. How many minutes does it take to cover 1 770
kilometres?
Answers
Answer:
Step-by-step explanation:
It would take 300 minuets
Which are correct representations of the inequality –3(2x – 5) < 5(2 – x)? Select two options.
x < 5
–6x – 5 < 10 – x
–6x + 15 < 10 – 5x
A number line from negative 3 to 3 in increments of 1. An open circle is at 5 and a bold line starts at 5 and is pointing to the right.
A number line from negative 3 to 3 in increments of 1. An open circle is at negative 5 and a bold line starts at negative 5 and is pointing to the left.
Answers
I think its a is one of them, im not completely sure tho
Step-by-step explanation:
Superior segway tours gives sightseeing tours around chicago, illinois. it charges a one-time fee of $60, plus $28 per hour. what is the slope of this situation? a. 28 b. 32 c. 60d. 88
Answers
Answer:
the answer is (a) 28.
Step-by-step explanation:
The given situation can be represented by a linear equation of the form:
Cost = mx + b
where "m" is the slope (the rate of change of cost with respect to time), "x" is the number of hours of the tour, and "b" is the y-intercept (the cost when x = 0).
In this case, the y-intercept is $60, which represents the one-time fee. The cost increases by $28 per hour, so the slope is:
m = $28/hour
Therefore, the answer is (a) 28.
Micah wants to know the most common style of surfboard used at Breakers Point. He surveys surfers at Breakers Point between 8:00 A.M. and 12 P.M. Select all the statements that are true about Micah’s survey.
Micah will obtain a random sample by talking to as many surfers as possible.
The population for the survey is all people who surf at Breakers Point.
Micah will not get a representative sample.
Micah's sample will be representative because anyone can surf at Breakers Point.
Micah's sample is all people who surf at Breakers Point.
Answers
The statements which are true about Micah's survey are;
Micah will not get a representative sample.The population for the survey is all people who surf at Breakers Point.Which statements are true about Micah's sample?As evident in the task content; Micah wants to know the most common style of surfboard used at Breakers Point.
Hence, it can be inferred that the population of the survey in this context is; all people that surf at Breakers Point.
Also, since Micah only surveys surfers between 8:00 AM and 12:00 PM, it follows that; Micah will not get a representative sample.
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