Answer:
(5³)⁹/5¹² = 1
Step-by-step explanation:
(5³)⁹/5¹²
Add the exponents
5¹²/5¹²
Divide
1
40 x 0.45 = 18 students are boys
Answer:
7. D:61
8. A:57
9. A: 47
Step-by-step explanation:
Quesiton 7:
To find perimeter we add all the sides together.
x+2x+2x+5=145
Combine all the x's.
5x+5=145
To isolate the constants, subtract 5 from both sides.
5x=140
Now divide both sides by 5 to isolate the x.
x=28
The questions asks for the length of AC, so to find that we need to insert our new x.
AC= 2(28)+5
56+5=61