1. 7x + 3 - 2x....x = 8
7(8) + 3 - 2(8) = 56 + 3 - 16 = 43
4. 7 - (-2y) + y - 9....y = 6
7 - (-2(6) + 6 - 9 = 7 + 12 + 6 - 9 = 16
7. -x + 8 + 7x - (-1).....x = -10
-(-10) + 8 + 7(-10) + 1 = 10 + 8 - 70 + 1 = -51
10. 4x + 2y - x - 8....x = 1, y = 5
4(1) + 2(5) - 1 - 8 = 4 + 10 - 9 = 5
13. 2x + 5y - 3x + (-8y)....x = -9, y = 9
2(-9) + 5(9) - 3(-9) - 8(9) = -18 + 45 + 27 - 72 = -18
Answer:
C. 104 feet
Step-by-step explanation:
The formula for the perimeter of a rectangle is p= 2(L+W). All you have to do is plug in your values.
Answer: x = 109/48
Step-by-step explanation:
1. Simplify 4 x x/5 to 4x/5
1/4 + 4x/5 = 31 15
2. Subtract 1/4 from both sides
4x/5 = 31/15 - 1/4
3. Simplify 31/15 - 1/4 to 109/60
4x/5 = 109/60
4. Multiply 1both sides by 5
4x = 109/60 x 5
5. Simplify 109/60 x 5 to 545/60
4x = 545/60
6. Simplify 545/60 to 109/12
4x = 109/12
7. Divide both sides by 4
x = 109/12/4
8. Simplify 109/12/4 to 109/12 x 4
9. Simplify 12 x 4 to 48
x = 109/48
Hope this helps & happy halloween! :)