For each expression, combine like terms and write an equivalent expression with fever terms. 1. 4x + 3x
2. 3x + 5x - 1
3. 5 + 2x + 7 + 4x
4. 4 - 2x + 5x
5. 10x - 5 + 3x - 2

1. 7x

2. 8x - 1

3. 6x + 12

4. 3x + 4

5. 13x - 7

Step-by-Step Explanation:

Hope this helps!

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.