Evaluate (n + 3)2 – 2n, when n = 2.
Answer:
-10
Step-by-step explanation:
Which equation describes the line that passes through the points (-4, 19) and (2, -1)
Answer:
y=-5/2x+4
Step-by-step explanation:
find the slope by using y2-y1/x2-x1
-1-19/2-(-4)
simplify
-20/8
simplify
-5/2
use slope-intercept form, y=mx+b
since we know the slope, find b
plug in one of the ordered pairs into the equation
-1=(-5/2)(2)+b
simplify
-1= -10/2+b
simplify
-1=-5+b
add 5 to both sides
b=4
plug b into y=-5/2x+b
y=-5/2x+4
The mean average of 4 numbers is 88 what is the fourth number if three of the numbers are 80 95 and 85?
Answer:the fourth number is =97
Step-by-step explanation:
Mean = total number of the given numbers( x1 +x2+ x3....) / numbers given
Let the fourth number be x
given that the mean of 4 numbers = 88 and only 3 numbers are given
such that
Mean = total number of the given numbers( x1 +x2+ x3....) / numbers given becomes
88= (80 +90 + 85 + x ) / 4
88 x 4 =80 +90 + 85 + x
352=255+x
x= 352-255
x=97
what is the equation for y=(1/4)^x+1
Answer:
A:(1,-3/4)
Step-by-step explanation:
Use substitution to solve the system
y= 1/4x-1
y= -1/2x-1/4
1/4x-1 = -1/2x-1/4, Solve for x
3/4x= 3/4, x = 1, Next solve for y by plugging the x-value into either equation.
y=1/4(1)-1
y=-3/4
what's bigger -1/5 or -0.9
Answer:
-1/5
Step-by-step explanation:
-1/5=-0.2
-0.9<-0.2
PLEASE HELP! GIVING POINTS :)!
Answer:
120
Step-by-step explanation:
180/0.60=300
300-180=120
Sara wants to buy a new tennis racket for $120. She currently has $40
and is saving $10 per week. The store owner is decreasing the price of
the tennis racket $5 every week he doesn't sell it. How many weeks
until she has enough money to buy the racket?.
weeks
Answer:
7 weeks
Step by step explanation:
40
15
6
x+1
solve for x
Answer:
4
Step-by-step explanation:
i do not understand how to explain this in english . i am sorry
a polygon is a figure that curves
a)true
b)false
c)both a and b
d)incorrect
explain your answer:❤
Answer:
I think that it would be true.
Step-by-step explanation:
I think it's true, because it has the union of three or more line segments whose endpoints meet.
What is 4/9 closest to 0,1/2 or 1
Answer:
1/2
Step-by-step explanation:
4/9 is equal to 4.444 repeating so that would be closest to 1/2
If D varies directly with t and D is 105 when t is 3, find D when t is 8.
Answer:
280
Step-by-step explanation:
answer is 280
Answer:
answer is 280
Step-by-step explanation:
d=xt
105=x3
35=x
d=35*8
d=280
Given m||n, Find the value of x. Need help.
9514 1404 393
Answer:
x = 12
Step-by-step explanation:
The two marked angles are a linear pair, so are supplementary.
(8x -20)° +(8x +8)° = 180°
16x -12 = 180 . . . . . . . . . . . divide by °, collect terms
16x = 192 . . . . . . . . . . . add 12
x = 12 . . . . . . . . . . . divide by 16
Layla was out at a restaurant for dinner when the bill came. Her dinner came to $9. After adding in a tip, Before tax, she paid $10.80. Find the percent tip.
Answer: 12%
Step-by-step explanation:
how many solutions does 4x-20= -2 (-2x + 10) have
Answer:
It only has one solution.
Step-by-step explanation:
4x-20= -2 (-2x + 10)
Add 20 to both sides
4x-20+20=4x-20+20
simplify:
4x=4x
Subtract 4x from both sides
4x-4x=4x-4
Simplify:
0=0
Which expression is equivalent to 76a^2b^3/19ab
The expression 76a²b³ / 19ab is equivalent to the expression 4ab².
What is an equivalent expression?The equivalent is the expressions that are in different forms but are equal to the same value.
The expression is given below.
⇒ 76a²b³ / 19ab
Then the expression can be written as
⇒ 4ab²
Then the expression 76a²b³ / 19ab is equivalent to the expression 4ab².
More about the equivalent link is given below.
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What rule is shown by this input/output table and coordinate plane?
A. add 3
B. subtract 3
C. divide by 2
D. multiply by 2
Answer:
B
Step-by-step explanation:
subtract 3
input and output always input should be your first one.
So, 6-3=3 7-3=4 8-3=5
9-3=6 10-3=7
Hope this helps u:)
Pls mark brainlist
Drag each number to the correct location on the table.
Classify each number according to its value.
3.2 x 105
1.9 x 101
2.2 x 10
2.4 x 10°
5.9 x 102
6.1 x 10
2.5 x 104
Greater than 2.4 x 104
Between 1.2 x 102
and 2.4 x 104
Less than 1.2 x 102
Answer:
3.2 x 10^5 goes in greater than 2.4 x 10^4
1.9 x 10^-1 goes in less than 1.2 x 10^2
2.2 x 10 goes in less than 1.2 x 10^2
2.4 x 10^3 goes in between 1.2 x 10^2 and 2.4 x 10^4
5.9 x 10^2 goes in between 1.2 x 10^2 and 2.4 x 10^4
6.1 x 10 goes in less than 1.2 x 10^2
2.5 x 10^4 goes in greater than 2.4 x 10^4
Step-by-step explanation:
First let's find out what 2.4 x 10^4 and 1.2 x 10^2 is.
2.4 x 10^4 = 24000
1.2 x 10^2 = 120
3.2 x 10^5 is obviously greater than 2.4 x 10^4 because the exponent of ten in 3.2 x 10^5 is one more value than the exponent in 2.4 x 10^4. The decimal is also greater.
1.9 x 10^-1 = .19, which is less than 1.2 x 10^2
2.2 x 10 = 22, less than 1.2 x 10^2
2.4 x 10^3 = 2400, in between 1.2 x 10^2 and 2.4 x 10^4
5.9 x 10^2 = 590, in between 1.2 x 10^2 and 2.4 x 10^4
6.1 x 10 = 61, less than 1.2 x 10^2
2.5 x 10^4 we can solve without doing the math, 2.5 is greater than 2.4 meaning the product will be greater, to check I did the math 2.5 x 10^4 = 25000, greater than 2.4 x 10^4
P.S Next time right ^ before the exponents, so we know they are exponents
You want to buy a pet lizard that costs $45. You already have $14 and you plan to save $7 per week. If w represents the number of weeks until you have enough money to buy the , what equation could you use to find the value of w? Explain how you could set up an equation to find the amount of money you should save each week if you want to buy the lizard in 3 weeks.
Which represents g(x)?
Answer:
a
Step-by-step explanation:
what expresion is equivalent to 2(14x - 3y + 28x + 12.2 - 5y - 17.5) ?
A. 84x - 16y - 10.6
B. 28x - 6y - 10.6
C. 42x - 8y -5.3
D. 84x - 16y - 5.3
Answer:
a.
Step-by-step explanation:
just did the quiz on edge
Which triangles are similar?
Triangles B and C oh, triangles A and B call love triangles AMC or triangles a b and c
Answer:
The Correct Answer Is C
Step-by-step explanation:
For The triangles have the same angles which checks out and the side sides, if say you simplified the sides or whatever
Therefore, its C
Hope I Helps!
Answer:
C. Triangles A and CStep-by-step explanation:
Given triangles A, B and C
Triangles A and C have congruent angles of 23° and 67° and similar sides with the scale factor of 3.
Triangle B is different, with angles 28° and 62°, therefore can't be similar to A or C.
Correct choice is C
11 The table below shows the amount of a decaying
radioactive substance that remained for selected
years after 1990.
0
2
5
9
14
17
19
Years After 1990 (X)
Amount (9)
750
451
219
84
25
12
8
Write an exponential regression equation for this
set of data, rounding all values to the nearest
x thousandth. Using this equation, determine the
amount of the substance that remained in 2002, to
the nearest integer
Answer:
65g52378
Step-by-step explanation:
Please help. Picture is attached below. Thank you! :) Will give brainliest!!
Answer:
e = 2
Step-by-step explanation:
Hope this helps! ///////////////////////
7(2e - 1) - 3 = 6 + 6e =
14e - 7 - 3 = 6 + 6e =
14e - 10 = 6 + 6e
-6e -6e
8e - 10 = 6
+ 10 + 10
8e = 16
e = 2
What form is this written in?
f(x)=(x-3)²+72
standard
intercept
vertex
slope
that should be vertex form
Answer:
C. vertexStep-by-step explanation:
Given function
f(x)=(x-3)²+72This is a vertex form of the quadratic function
Correct option is C
For each value of u, determine whether it is a solution to 2+9u<-16.
7: yes or no
-2: yes or no
2: yes or no
-7: yes or no
Answer:
7: no ( the answer will be 65 )
-2 : no ( the answer will be -16 and -16 is not less than -16 instead they're equal)
2 : no ( the answer will be 20 )
-7 : no ( the answer will be -61)
Non of them satisfy the condition
Hope this helped
Hope this helped ALL THE BEST!!
5( 2a + b - 8) =
......................................
Answer:
10a+5b-40
Step-by-step explanation:
5(2a+b-8)
Distribute
5(2a)+5(b)-5(8)
10a+5b-40
Answer:
10a+5b-40
Step-by-step explanation:
distribute to get the simplified version
10a+5b-40
What is the equation of a line perpendicular to y= 3x +6 that crosses the ordered pair (3,2).
(Hint: a line perpendicular to an equation has an opposite reciprocal slope)
Answer:
y=-[tex]\frac{1}{3}[/tex]x+3
Step-by-step explanation:
The table below lists the coordinates of four points. If x represents any number in any number in the first column, which expressions can always be used to find the value of y in the second column?
Answer:
2x + 3
Step-by-step explanation:
Julieta and Hanis have 3 dozen chocolate chip muffins, 54 banana muffins and 27 blueberry muffins. They are preparing identical gift baskets for their friends with all three types of muffins. They plan on using all of the muffins in the baskets. What is the largest number of baskets they can make and still have enough muffins
Answer:
9 is the largest number of baskets they can make and still have enough muffins.
Step-by-step explanation:
If they want to use all three types of muffins for the basket, they’d have to find the GCF (greatest common factor) of 30, 54, and 27, which is 9. They’d still have a lot left over... but if they want to put all three types of muffins then they can only make 9 full baskets.
Hope this helped :)
(PLEASE HELP)Solve the given system using your choice of either graphically or algebraically. Show and explain all work.
y = 2x - 4
x + 2y = 12
Answer:
algebraically.
y = 2x - 4........….....(1)
x + 2y = 12..............(2)
substituting the value of y in equation (2) we get
x+2(2x - 4)=12
x+4x-8=12
5x=12+8
x=20/5=4
substituting the value of x in equation(1) we get
y=2×4-4=8-4=4
:.(x,y)=(4,4)answer
The value of x = 4
The value of y = 4
What is an Equation?
Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the first equation be = A
Let the second equation be = B
Now ,
y = 2x -4
Subtracting 2x on both sides , we get
y - 2x = -4 be equation (1)
And ,
x + 2y = 12 be equation (2)
Now , on simplifying the two equations , we get
Multiply equation (1) by 2 , we get
2y - 4x = -8 be equation (3)
Now , subtract equation (3) from equation (2) , we get
5x = 20
Divide by 5 on both sides , we get
x = 4
Therefore , the value of x is 4
Substitute the value of x in equation (2) , we get
4 + 2y = 12
Subtracting 4 on both sides , we get
2y = 8
Divide by 2 on both sides , we get
y = 4
Therefore , the value of y is 4
Hence , The value of x and y is 4
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