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3 years ago

Given: A(-4,1), B (6, 1), C (-2, -3), D (4, -3), E (5, 4) and the center O (1, 1); use 3.14 for

Mathematics

1 answer:

UNO [17]3 years ago

4 0

Answer:

Step-by-step explanation:

R = 5 cm = 1 - (-4)

D = 10 cm = 2R

CD = 6 cm = 2 - (-4)

A = π(5)² = 25π cm²

Α ≈ 25(3.14) = 78.5 cm²

C = 10π

C ≈ 10(3.14) = 31.4 cm

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3 years ago

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Dmitriy789 [7]

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3 years ago

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If three quarters of a number decreased by twenty is equal to eighty two, what is that number?

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A number is :

$x$

_________________________________

Three quarters of it means :

$\frac{3}{4}x \\$

_________________________________

Decrease by 20 means :

$\frac{3}{4}x - 20 \\$

_________________________________

Equals to 82 means :

$\frac{3}{4}x - 20 = 82 \\$

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What is that number ?

x asked so we must solve the above equation for x.

Let's do it....

$\frac{3}{4}x - 20 = 82 \\$

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$\frac{3}{4}x = 82 + 20 \\$

$\frac{3}{4}x = 102 \\$

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$3x = 102 \times 4$

Divided sides by 3

$x = \frac{102 \times 4}{3} \\$

$x = \frac{102}{3} \times 4 \\$

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3 years ago

Mrs. Simmons gave a history test worth 92 points. There were only two types of questions on it: 2-point true/false questions and

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3 years ago

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