Answer:
10
Step-by-step explanation:
5 · (3r - 10)
If r = 4, this expression becomes 5 · (3[4] - 10), or 60 - 50, or 10.
Answer:
13
Step-by-step explanation:
We need to use the Pythagorean Theorem to solve this problem:
, where a and b are the legs of the right triangle and c is the hypotenuse
In this case, we already know b (b = 84) and c (c = 85), so we need to solve for a:

Thus, a = y = 13.
Answer:
Tank A fills up faster.
Step-by-step explanation:
Tank A is y = 13x
Tank B is y = 11x
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The question is incomplete:
Find the number of boxes needed, x, for 42 granola bars.
The table with the information is attached.
Answer:
The number of boxes needed for 42 granola bars is 7.
Step-by-step explanation:
Since the table shows that for 12 granola bars 2 boxes are needed, you can use a rule of three with this information to find the number of boxes needed for 42 granola bars:
12 granola bars → 2 boxes
42 granola bars → x
x=(42*2)/12
x=84/12
x=7
According to this, the answer is that the number of boxes needed for 42 granola bars is 7.