Answer:
B) 53x + 74
Step-by-step explanation:
(59x + 64) - (6x - 10) = 59x + 64 - 6x + 10
= 53x + 74
True
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A closed circuit basically means everything is connected by wires and for this setup every device receives electricity making this true
Multiply both sides by -4/7
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.
</span>
So, if <span>Sandy puts in x=7 shovels of cement, then she puts

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