Question

Suppose the temperature increases 8º to -7ºF. What was the starting temperature?
a.
15º
c.
-13º
b.
-20º
d.
-15

Answer 1

so you can write the eq x+8=-7
This defines this problem, can you solve it from here?

Answer 2

- 15?

Answer 3

That is correct. Do you know how I came up with the eq?

Answer 4

x is the starting temperatute u have to add because it says it increases

Answer 5

Add '-8' to each side of the equation.
8 + -8 + x = -7 + -8

Combine like terms: 8 + -8 = 0
0 + x = -7 + -8
x = -7 + -8

Combine like terms: -7 + -8 = -15
x = -15

Answer 6

Yep, That is right. Any other questiions?

Answer 7

yes 1 more

Answer 8

When –3 is multiplied by the sum of a number and 8, the result is –21. Find the number.
A.
3
B.
–1
C.
8
D.
–2

Answer 9

Let's use the same approach as before, what eq can you make?