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Scrat [10]
1 year ago
9

HELPPPP which value is equal to 2✓28-5✓63?a-37✓7b-✓7c-11✓7d✓7​

Mathematics
1 answer:
IrinaVladis [17]1 year ago
7 0

Answer:

c

Step-by-step explanation:

if I understand this right, then the expression is

2×sqrt(28) - 5×sqrt(63)

let's look for squared factors in the numbers under the square roots.

28 = 4×7 (4 is a squared number)

63 = 9×7 (9 is a squared number)

so,

2×sqrt(4×7) - 5×sqrt(9×7) =

= 2×2×sqrt(7) - 5×3×sqrt(7) = 4×sqrt(7) - 15×sqrt(7) =

= (4 - 15)×sqrt(7) = -11×sqrt(7)

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Problem 1

x = measure of angle N

2x = measure of angle M, twice as large as N

3(2x) = 6x = measure of angle O, three times as large as M

The three angles add to 180 which is true of any triangle.

M+N+O = 180

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<h3>Answers:</h3>
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  • Angle N = 20 degrees
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====================================================

Problem 2

n = number of sides

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<h3>Answer: 17 sides</h3>

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Problem 3

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This leads to 3x = 3*22.5 = 67.5

<h3>Answers:</h3>
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