To figure out the answer just divide 664 by 135, then round to the nearest tenth.
Answer:
Step-by-step explanation:
<u>Given:</u>
- Total certificates = 500
- Math = m
- Science = s
<u>Equations </u>
<u>Girls who won certificates:</u>
- 2/3m = 50 + 3/2*1/2s
- 2/3m = 50 + 3/4s
<u>Multiply both sides by 12 to clear fractions</u>
<u>Substitute s</u>
- 8m = 600 + 9(500 - m)
- 8m = 600 + 4500 - 9m
- 17m = 5100
- m = 5100/17
- m =300
<u>Girls who won math:</u>
Answer:
7z
Step-by-step explanation:
4z-(-3z)
4z+3z->double neg=addition
7z
This is a ratio problem. You only need solve the ratio of the sand.
<u> 48 </u> <u /> = <u> n </u> <u />
1 156
(48)(156) = 1(n) (cross multiplying)<span>
</span>
7,488 pounds
To check: The pool deck is 156 times larger than the original amount of concrete so the amount of sand needs to be 156 times more.