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3 years ago

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Please help answer my question!

1 answer:

Paha777 [63]3 years ago

5 0

No photo... can’t help unless I can see it

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Solve the system by substitution. <br> −7x−10y= 40 <br> x=−2y

Harrizon [31]

Answer:

x= -20, y= 10

Step-by-step explanation:

Label the two equations:

-7x -10y= 40 -----(1)

x= -2y -----(2)

Substitute (2) into (1):

-7(-2y) -10y= 40

Expand:

14y -10y= 40

Simplify:

4y= 40

Divide both sides by 4:

y= 40 ÷4

y= 10

Substitute y= 10 into (2):

x= -2y

x= -2(10)

x= -20

5 0

3 years ago

Which ordered pairs in the form (x, y) are solutions to the equation<br><br> 7x−5y=28?

belka [17]

Answer:7x + -5y = -28

(-4, _)

(1, _)

(_, 14)

Step-by-step explanation:

6 0

3 years ago

Paul displays his sports trophies on shelves in his room

GenaCL600 [577]

That’s pretty nice for Paul

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3 years ago

Read 2 more answers

If F(x) = +4, which of the following is the inverse of Fx)?

Viefleur [7K]

Answer:

$f^{-1} = \frac{ 7(x-4)}{2}$

Step-by-step explanation:

Given

$f(x) = \frac{2x}{7} + 4$

Required

The inverse function

$f(x) = \frac{2x}{7} + 4$

Replace f(x) with y

$y = \frac{2x}{7} + 4$

Swap x and y

$x = \frac{2y}{7} + 4$

Multiply through by 7

$7x = 2y + 28$

Solve for 2y

$2y = 7x - 28$

Solve for y

$y = \frac{ 7x-28}{2}$

Factorize

$y = \frac{ 7(x-4)}{2}$

Write as:

$f^{-1} = \frac{ 7(x-4)}{2}$

3 0

3 years ago

I need help pls-

Reptile [31]

Answer: y=4x

Step-by-step explanation:

hope it helped if not srry it was the answer to mine mate gl!

6 0

2 years ago