3 years ago

Whats the value of x 1-7x=-20

Mathematics

1 answer:

aksik [14]3 years ago

7 0

1 - 7x = -20 |subtract 1 from both sides

-7x = -21 |divide both sides by (-7)

x = 3

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The ratio of 4:8 is equivalent to x:6, what is the value of x?

Dimas [21]

Answer:

x = 3

Step-by-step explanation:

Given

4 : 8 = x : 6, expressing in ratio form, that is

$\frac{4}{8}$ = $\frac{x}{6}$ ( cross- multiply )

8x = 24 ( divide both sides by 8 )

x = 3

Thus 4 : 8 = 3 : 6

6 0

2 years ago

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A circular sector has a central angle of π6 radians and a radius of 9 ft.

ohaa [14]

Answer:

$\approx \: 21.2 \: {ft}^{2}$

Step-by-step explanation:

$central \: \angle = \frac{\pi ^{c} }{6} = 30 \degree \\ \\ area \: of \: the \: sector = \frac{30 \degree}{360 \degree} \times \pi {(9)}^{2} \\ \\ = \frac{1}{12} \times 3.14 \times 81 \\ \\ = \frac{1}{12} \times 254.34 \\ \\ = 21.195 \: {ft}^{2} \\ \\ \approx \: 21.2 \: {ft}^{2}$