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

and y=3x.
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So, if <span>Sandy puts in x=7 shovels of cement, then she puts

shovels of sand.
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</span><span>
Answer: 21 shovels of sand.
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Answer:

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Step-by-step explanation:
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hello :)
so here i am assuming that 66m^2 is the area and the height is 6.3 (sorry, but the way you wrote it is a bit funny, its all good tho)
so to calculate area it is hieght multipled by width
so you have to divide 66 by 6.3, which gives you this very long number : 10.4761904762
i would personally round it to either just 10 or 10.5
so you would want to write the answer as ≈10.5
hope that helped!
i would appreciate it if you voted me as brainliest :)