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Mathematics

1 answer:

professor190 [17]2 years ago

4 0

Answer:

2.5•2 = 5

Step-by-step explanation:

The resulting two-dimensional cross-section is the area of a square.

Area of a square is equal to:

$A=bh$

Having

$b = 2.5\ in\\h = 2\ in$

substitute

$A=2.5*2=5\ in^{2}$

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B - 13

Okay, we know that Mark brought 1 notebook and the totally is 6.91 while one pencil costs $0.42.

x= number of pencils he brought.
we know the price of 1 notebook + the cost of pencils times the numbers of pencils he brought = total cost.

So the equation will be:

1.45 + 0.42x = 6.91 subtract 1.45 on both sides.
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So the number of pencils he brought is 13.

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