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sergiy2304 [10]
3 years ago
14

Help pleasee

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
8 0
Set this up as a proportion with cement on top and sand on bottom.  Our proportions will look like this then: \frac{1}{3} = \frac{7}{x}.  Cross multiply to get x = 21.  So 21 shovels of sand is needed.
Mnenie [13.5K]3 years ago
6 0
Let x be the amount of cement and y be the amount of sand. If <span>the ratio of cement to sand for mortar is 1:3, then \frac{x}{y} = \frac{1}{3} and y=3x.
</span>
So, if <span>Sandy puts in x=7 shovels of cement, then she puts y=3\cdot 7=21 shovels of sand.
</span><span>
</span><span>Answer: 21 shovels of sand.
</span>
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Chloe reads 7 pages of a mystery book in 9 minutes. What is her average reading rate in pages per
myrzilka [38]

Answer:

1.25

Step-by-step explanation:

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1 year ago
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fiasKO [112]

Answer:

17%

Step-by-step explanation:

to find the percentage of something, you have to fill out the following formula:

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then you have to divide, to single out x:

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3 0
2 years ago
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The color distribution of Skittles is the following: 10% blue, orange, and green each, 23.3333% yellow, red, and purple each. In
irina1246 [14]

Answer:

No

Step-by-step explanation:

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Yellow = 130

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According to the color distribution :

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We should have 50 blue, orange and green skittles

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3 0
2 years ago
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Usimov [2.4K]

Answer:

CD = 7

Step-by-step explanation:

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3 years ago
What is 12/3 as an improper fraction?
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3 years ago
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