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frutty [35]
3 years ago
15

naomi needs to solve 28 ÷ 7 = ?what related multiplication fact can she use to find the unknown number?

Mathematics
1 answer:
castortr0y [4]3 years ago
6 0
28/7 =4
7•4 is 28 or
7+7+7+7 is also 28
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Pls pls help I’m really confused could someone explain to me pls
kenny6666 [7]
Answer: 11.6

--------------------------------------

Explanation:

See the attached image for a visual reference

The distance from point D to E is 21 units. Point C is the midpoint, so CD is 10.5 units long (21/2 = 10.5)

We have a right triangle ACD. The legs are
AC = 5
CD = 10.5
The hypotenuse is 
AD = x
Because AD is another radius of the same circle

Use the pythagorean theorem to find x
a^2 + b^2 = c^2
5^2 + 10.5^2 = x^2
25 + 110.25 = x^2
135.25 = x^2
x^2 = 135.25
x = sqrt(135.25)
x = 11.629703349613
which rounds to 11.6 when rounding to the nearest tenth (one decimal place)

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3 years ago
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Step-by-step explanation:

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