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BabaBlast [244]
3 years ago
6

Can someone answer this please!!

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
5 0

Answer:

<u>The perimeter of the square is option E. 16√5 mm.</u>

<u>The area of the square is option A. 80 mm².</u>

Step-by-step explanation:

1. Let's calculate the perimeter of this square:

The perimeter of a square is the sum of its side 4 times, thus:

Perimeter = 4√5 + 4√5 + 4√5 + 4√5

<u>Perimeter = 16 √5</u>

<u>Perimeter = 4 * 4√5 = 16√5</u>

<u>The correct answer is option E. 16√5 mm</u>

2. Let's calculate the area of this square:

The area of a square is the length of its side squared, thus:

Area = (4√5)²

Area = 4√5 * 4√5

Area = (4 * 4 * √5 * √5)

Area = 16 * 5 = 80

<u>The correct answer is A. 80 mm²</u>

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Answer:

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Step-by-step explanation:

For these type of questions, we can equate the ratio with the actual amounts. We will let the quantity to find be an unknown variable, such as x. Then we equate the ratios, cross multiply, and use algebra to solve.

Let grams of zinc be "x", so we can write the ratios and actual amounts as:

\frac{3}{16}=\frac{x}{320}

Then we cross multiply and solve for x, what we want to find out. Shown below:

\frac{3}{16}=\frac{x}{320}\\16x =3 * 320\\16x = 960\\x = \frac{960}{16}\\x=60

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jeka94
Four friends go out to lunch and they agree to split the bill evenly.
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