Addition Property Equation, algebra homework help

Answer all. VERY EASY.

10. What property justifies the equation in step 2?
Step 1: 4x – 3 = 72
Step 2: 4x – 3+3= 75 + 3
Step 3: 4x = 78
40 78
Step 4
4 4
Addition Property of Equality
Subtraction Property of Equality
Multiplication Property of Equality
Division Property of Equality
11
A rectangle has a perimeter of 144 inches. The width of the rectangle is 12 inches less than the length. What is the width, in inches, of the rectangle?
42 inches
27 inches
30 inches
39 inches
12. Solve (45y-18)-156y:1).
y=-21
Infinitely Many Solutions
No solution
y = 21
14
Kendra has been saving for a stereo. She has $105 saved and plans to save $20 per month until she can buy the stereo. If the stereo costs $345, how many more months will Kendra need to save so she can buy the stereo?
23
10
17
12
15. Solve 15’s – 3) = 125 – 43.
S–
s-
16. If 4x – 2y = 6, then y =
2x – 6
2x-3
2x + 6
2x + 3
17. Which process was used to obtain the equation shown in Step 2?
Step 1 – 5
Step 2 4y – 3 = 60
added 5 to both sides of the equation
divided both sides of the equation by 12
multiplied both sides of the equation by 12
added
to both sides of the equation
18. The temperature is 4° Celsius. Find the temperature in Fahrenheit. C=2
-32)
SHOW ALL WORK and JUSTIFY YOUR STEPS FOR FULL CREDIT!
19. Solve 2x = -10.
x = 5
x = -5
x = 8