Question

An unknown number y is 12 more than an unknown number x. The number y is also x less than 17. The equations to find x and y are shown below.

y = x + 12
y = −x + 17

Which of the following statements is a correct step to find x and y?

Multiply the equations to eliminate y.
Write the points where the graphs of the equations intersect the x-axis.
Write the points where the graphs of the equations intersect the y-axis.
Add the equations to eliminate x.

Answer 1

@aloud

Answer 2

@badmood

Answer 3

Add the equations to eliminate x.

Answer 4

u sure ?

Answer 5

y = 29/2

Answer 6

true true

Answer 7

If you add those equations, you get:
y+y=x+12−x+17

Answer 8

can u help me wit like 3 more ?

Answer 9

sure

Answer 10

Shiloh is 7 years older than Courtney. Shiloh's age is 13 years less than two times Courtney's age. The system below models the relationship between Shiloh's age (s) and Courtney's age (c):

s = c + 7
s = 2c − 13

Which of the following methods is correct to find Shiloh's and Courtney's age?

Solve s + 7 = 2s − 13 to find the value of s.
Solve c + 7 = 2c − 13 to find the value of c.
Write the points where the graphs of the equations intersect the x-axis.
Write the points where the graphs of the equations intersect the y-axis.

Answer 11

I would say s = 2c − 13

Answer 12

but which of the following methods is correct to find Shiloh's and Courtney's age?

Answer 13

Solve c + 7 = 2c − 13 to find the value of c.

Answer 14

Variable a is 4 more than variable b. Variable a is also 1 less than b. Which of the following pairs of equations best models the relationship between a and b?

a = b + 4
a = b − 1
a = 4b
a = b + 1
b = a + 4
b = a − 1
b = 4a
b = a + 1

Answer 15

there in sets of 2 so theres four answers

Answer 16

u still there ?