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vladimir1956 [14]
3 years ago
8

What is √ 63 − 4 √ 7??

Mathematics
1 answer:
tester [92]3 years ago
4 0

Answer:

- √7

Step-by-step explanation:

√63 = √9*7 = √9*√7

Sqrt(9) = 3

3√7 - 4√7 = -1√7=  -√7

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Find the value of x and y​
Svetllana [295]

Answer:

x = 1

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Step-by-step explanation:

cos(pi) = -1

so many ways :

sqrt(0.5/2) = sqrt(0.5/2 × 8/8) = sqrt(4/16)

= sqrt(0.5/2 × 18/18) = sqrt(9/36)

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"nicest" approach (all integers) :

3x² = sqrt(9)

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x² = 3/3 = 1

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so, y = -3

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correct

4 0
2 years ago
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