Answers
Fort the first equation just click on the photo and for the second it’s x-y=-1
Answer:
x= 3, y= 8
or x= -1, y= 0
Step-by-step explanation:
y= 2x² -2x -4 -----(1)
y -2x= 2
y= 2x +2 -----(2)
Substitute (1) into (2):
2x² -2x -4= 2x +2
2x² -2x -4 -2x -2= 0 (bring all terms to the left)
2x² -4x -6= 0 (simplify)
x² -2x -3= 0 (÷2 on both sides)
(x -3)(x +1)= 0 (factorise)
x -3= 0 or x +1= 0
x= 3 or x= -1
Substitute into (2):
y= 2(3) +2 or y= 2(-1) +2
y= 6 +2 or y= -2 +2
y= 8 or y= 0
Related Questions
Simplify.
7x + 3(x - 2) - 4x + 8
Answers
Answer:
6x+2
Step-by-step explanation:
First you have to do the parenthesis.
The equation should be now,
7x+3x-6-4x+8
I would now add the variables
6x-6+8
6x+2
What are benefits of good study habits? Check all that apply.
improved academic performance
reduced stress
better performance in extra-curricular activities
remembering information
O an effective use of time
Electives class
Answers
Answer:
1, 3, 4 i hope this helps ;)
Step-by-step explanation:
Answer: a c d
Step-by-step explanation:
Point I is on line segment HJ. Given IJ=4 and HI=8 determine the length HJ
Pleaseeee help
Answers
Answer: 12
Step-by-step explanation:
Find the sum of the numbers. Express your answer in scientific notation.
(1.83 times 10 Superscript 13 Baseline) + (6.4 times 10 Superscript 11)
6.4183 times 10 Superscript 11
8.23 times 10 Superscript 12
1.894 times 10 Superscript 13
2.471 times 10 Superscript 13
Answers
1.83 x 10¹³ + 6.4 x 10¹¹ = 10¹⁰ (1.83 x 10³ + 6.4 x 10¹)
1.83 x 10¹³ + 6.4 x 10¹¹ = 10¹⁰ (1830 + 64)
1.83 x 10¹³ + 6.4 x 10¹¹ = 1894 x 10¹⁰
1.83 x 10¹³ + 6.4 x 10¹¹ = 1.894 x 10¹³
Answer:
C UwU
Step-by-step explanation:
Karen makes $5 per hour babysitting and $12 per hour giving music lessons. One weekend, she worked a total of 18 hours and made $139.
How many hours did she spend babysitting?
How many hours did she spend giving music lessons?
Answers
This scatterplot and regression line below show the relationship between the average rent for a 1-bedroom apartment in New York and the number of years after the year 2000. The fitted line has a y-intercept of 800. What is the best interpretation of this y-intercept?
Answers
Answer: That the average price of a 1-bedroom apartment in New York in the year 2000 was around $800.
Step-by-step explanation:
In this case, x represents the number of years after the year 2000.
Then we can think that x = 0, represents the year 2000 itself.
Now, remember that the y-intercept is the value of y when we have x = 0.
Then the y-intercept gives information about the average price of a 1-bedroom apartment in the year 2000.
The information that we can conclude with this is that the average price of a 1-bedroom apartment in New York in the year 2000 was around $800.
Which of the following can x be equal to? –1 1 –2 3
plss help
Answers
Answer:
-2 I think hopefully that is right
Answer:
-2 and 3
Step-by-step explanation:
edge2020
Hay dos números naturales consecutivos y la suma del cuadrado de esos números es 221¿cuáles serán esos números?
Answers
The sum of squares is:
(x)² + (x+1)² = 221
Expand second term:
x² + x² + 2x + 1 = 221
Combine like terms:
2x² + 2x + 1 = 221
Subtract 221 from both sides to make quadratic form:
2x² + 2x - 220 = 0
Divide both sides by 2:
x² + x - 110 = 0
Factor:
(x + 11)(x - 10) = 0
x = -11 or x = 10
Answers: 10 and 11 or -10 and -11
PLEASE HELP!!
Choose yes or No to tell whether the expressions are equivalent.
(4^3)^3 and 4^3 • 4^3
(3^4)^4 and 3^8 • 3^8
6^4 • 3^4 and 18^8
4^3 • 5^3 and 20^ 3
Answers
Answer:
no
yes
no
yes
Step-by-step explanation:
How is quadrilateral ABCD related to quadrilateral A'B'C'D' shown below?
Answers
Answer:
i think its a
Step-by-step explanation:
Mr. Trpkosh was calculating the rate of change of two functions. The first function had a rate of change of -10; the second function had a rate of change of 8. Norman said the second function had the greater rate of change because 8 is greater than -10. Do you agree or disagree with Mr. Trpkosh? Explain your answer. *
Answers
Answer:
No, I do not agree with Mr. Trpkosh.
Step-by-step explanation:
The rate of change of a function means the total change in the function for a unit change in the independent variable.
If the function is increasing with increment in the independent variable, then the rate of change of the function is positive, while if the function is decreasing with the same, then the rate of change of the function is negative.
Given that the rate of change of the first function = - 10, so this function is decreasing with a rate of 10.
The rate of change of the second function = 8, so this function is increasing with a rate of 8.
So, the first function has a higher rate of change.
The amount Troy charges to mow a lawn is proportional to the time it takes him to mow the lawn. Troy charges $30 to mow a lawn that took him 1.5 hours to mow.
Which equation models the amount in dollars, d, Troy charges when it takes him h hours to mow a lawn?
A) d = 20h
B) h = 20d
C) d = 45h
D) h = 45d
Answers
First, let's find the amount of money Troy charges per hour.
$30 / 1.5hrs = $20 / hr
d = $20h
A is the correct answer choice.
Ara is lining the bottom and lateral faces of a drawer with liner paper. The dimensions of the inside of the drawer are 1 yard, 29 inches, and 9 inches. What is the total area in square inches being covered? The total area being covered is square inches.
Answers
Answer:
The total area being covered is 3,528 square inches
Step-by-step explanation:
Mathematically, we can deduce the shape of the drawer using the dimensions.
With the dimensions given, we can infer that the drawer is shaped like a match box which thus is in the shape of a cuboid.
We can then proceed to find the area of the cuboid.
Mathematically, the area of a cuboid can be calculated as;
2(lb + lh + bh)
Kindly note we need to have a uniform unit before we proceed to calculate the area.
Mathematically, 1 yard is 36 inches
So the sides of the drawer measures 36 inches by 29 inches by 9 inches
Thus, the area is thus;
2( 29(9) + 36(29) + 9(36))
= 2(261 + 1044 + 324)
= 2(1629)
So the area of the drawer is 3,528 square inches
Box of 36 rubber bands he used 1/4 of the rubber bands in the box how many rubber bands did use
Pleas help
Answers
Answer:
9 rubberbands
Step-by-step explanation:
If it helps. Think of 1/4 as dividing by 4 and then multiplying by 1.
36/4 = 9 x 1 = 9.
If angle P measures 60 degrees, what is the measure of angle C?
A)120
B)30
C)60
Answers
Answer:
Answer is 120
Step-by-step explanation:
Ari divides by 6 and gets a quotient of 9.3. What is the dividend in Ari's division problem? *
Answers
Answer:
I believe the answer is 1.55
Step-by-step explanation:
Answer:
55.8
Step-by-step explanation:
to find the quotient you must multiple the divisor and quotient
6*9.3=55.8
I need help ASAP!!!!
Answers
Answer:
3x-x+2=4
Step-by-step explanation:
Quinn has a large family. She has 4 cousins who live in Texas, 3 cousins who live in Nebraska, and 9 cousins who live in Michigan...
What is the ratio of Quinn's cousins who live in Texas to her cousins who live in Michigan?
Answers
Answer:
c)4:9
Step-by-step explanation:
Find the measure of angle b
Answers
Answer:
130°
Step-by-step explanation:
a straight line is 180°
so you have
180°-50°= 130°
b and 50 are supplementary angles (they add up to 180), so create an equation by adding them up to equal 180:
b + 50 = 180
we want the x by itself, so subtract both sides by 50 to get:
b = 130°
Why am not being allowed to login?
Answers
These are all possibilities that you may or may not understand
Hope this helps you
✨SammySilkWorm waz here✨
Answer:
mine is doing the same thing
Step-by-step explanation:
PLEASE HELP!! WILL MARK BRAINLIEST!!
Answers
Answer:
<QPR=88
Step-by-step explanation:
the third one is the correct answer
what is the answer to x/2+3<12 ?
Answers
Answer:
x<18
Step-by-step explanation:
What is the slope of the given lines ?
Answers
Answer:
slope = [tex]\frac{4}{3}[/tex]
Step-by-step explanation:
Calculate the slope m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (- 5, - 8) and (x₂, y₂ ) = (7, 8) ← 2 points on the green line
m = [tex]\frac{8+8}{7+5}[/tex] = [tex]\frac{16}{12}[/tex] = [tex]\frac{4}{3}[/tex]
Repeat with (x₁, y₁ ) = (0, - 6) and (x₂, y₂ ) = (3, - 2) ← 2 points on the blue line
m = [tex]\frac{-2+6}{3-0}[/tex] = [tex]\frac{4}{3}[/tex]
Since the slopes of both lines are equal, then the lines are parallel
Factor 54+27 using the GCF.
The factored expression is ?
Answers
Answer:
27(2+1)
Step-by-step explanation:
Its 27(2+1) because 27 is the GCF and it goes into 54 and 27 then you divide 54/27 and then 27/27, at that point you have the numbers 2 and 1 then you just put them into the equeation. And BOOM just like that your finished.
Evaluate -2x + 8y when x=1/3
and y = 1/6.Write your answer as a fraction in simplest form.
Answers
Answer:
2/3 or 0.6
Step-by-step explanation:
Aight bois this can be worth a brainliest so y’all better help me out
Answers
Answer:
The differences between a physical change and a chemical change are as follows :
Physical change is a temporary and usually reversible change in which no new substances are formed whereas Chemical change is a permanent and it is usually an irreversible change in which new substances with different properties are formed. In physical change, the chemical composition of the substance remains the same but only the physical properties like state , colour , speed , motion , shape , size etc are changed whereas In chemical change , the physical properties , the chemical properties and the chemical composition of the substances are changed.Physical change is a reversible change as it occurs in forward as well as backward directions whereas chemical change is an irreversible change as it cannot be reversed back from products to reactants.Some of the examples of physical change are glowing of an electric bulb , magnetising an iron nail , preparing a solution , changing of ice into water and water vapour etc. Some of the examples of chemical change are changing milk into curd , rusting of iron , burning magnesium ribbon , decaying grasses , cooking rice etc.Hope I helped!
Best regards ! :D
~[tex] \text{TheAnimeGirl}[/tex]
Can someone please help me
Answers
Answer:
20
Step-by-step explanation:
It has 18 sides and 18 x 20 = 360...
PLEASE HELP
On graduating from college, you recieve $3,000 in gifts from family and friends. You want to invest it for later use as $15,000 down payment on a house. You have found an opportunity that locks in a 10% annual interest rate. How many years will it take to turn your graduation gifts into a down payment?
Answers
Answer:
6,346
Step-by-step explanation:
add add multiply and add
Giving Brainliest
Jabari and his friend both started a part-time job at the Swimming Hole earning $13 per hour. Jabari worked 14 ½ hours his first week. Jabari agreed to pay his friend 1/10 of his salary for reimbursement of gas. How much money did Jabari pay his friend for gas?
Answers
Answer: the answer would be 18.85
Step-by-step explanation:
multiply 13 by 14.5 then divide by 1/10
Answer:
18.85
Step-by-step explanation:
what's 4 divided by 5 as a fraction
Answers
Answer:
four fifths because if you divided 4 by 5 is 0.8 and that equals four fifths