1. We are given:

The only a which squared gives you 64 is 8. The perimeter of an 8 by 8 square will be 32. Half of that is 16. Now, let's see what we can do. We can set up:

Obviously, each side length has to be 4. So, the area of this square will be
16 units².
2. Let n equal her son's age. So, her age right now will be (S = her age):

1 year ago it was:

We have 2 equations, let's substitute. We can rewrite this as:

Solve for n:


We know the value of n, which is her son's age. So, her son is
1/15 of a year old or about 24 days old.
Answer:
-2
Step-by-step explanation:
5 - 1 = 4
-3 - (-5) = -2
4/-2 is simplified to 2/-1, which is then rewritten as -2
Answer:
Goal = x
45000 = 9/10 * x
x = 45000 * 10/9 = 50000
Step-by-step explanation:
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You can evaluate the functions separately, then add results:
.. f(3) = 2*3 +21 = 27
.. g(3) = 3 -24 = -21
(f +g)(3) = f(3) +g(3) = 27 -21 = 6
Or, you can find the combined function and evaluate that for x=3.
.. (f +g)(x) = f(x) +g(x)
.. = (2x +21) +(x -24)
.. = 3x -3
The
.. (f +g)(3) = 3*3 -3 = 6
Either way, the best choice is C) 6.
12 hours..........
+ - = 1
Multiply by 12 to clear the fractions
3t + 2t - 4t = 12
t = 12 hrs to fill the pool