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2 years ago

Write some numbers that are equal to 15÷12

Mathematics

2 answers:

Liono4ka [1.6K]2 years ago

7 0

Answer

14 / 13 hope this helps

Step-by-step explanation:

Arturiano [62]2 years ago

4 0

5 / 4 = 1.25
2.5 / 2 = 1.25

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(6) 35% of what number is 14?

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Answer: 40

Step-by-step explanation:

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14×100÷35 = 40

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2 years ago

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2 years ago

Given that tan x =3/7find cos (90-x) giving you answer in 4 significant figures

Vanyuwa [196]

Answer:

$\cos \left(90 ^\circ - x\right) \approx 0.1688$

Step-by-step explanation:

We are given that:

$\displaystyle \tan x = \frac{3}{7}$

And we want to find the value of:

$\displaystyle \cos \left(90^\circ - x\right)$

Recall that by definition, tan(θ) = sin(θ) / cos(θ). Hence:

$\displaystyle \frac{\sin x }{\cos x} = \frac{3}{7}$

And by definition, sin(θ) = cos(90° - θ). Hence:

$\displaystyle \frac{\cos \left(90^\circ - x\right)}{\cos x} = \frac{3}{7}$

Multiply:

$\displaystyle \cos \left(90 ^\circ - x\right) = \frac{3}{7} \cos x$

Find cosine. Recall that tangent is the ratio of the opposite side to the adjacent side. Therefore, the opposite side is 3 and the adjacent side is 7.

Thus, by the Pythagorean Theorem, the hypotenuse will be:

$\displaystyle h = \sqrt{3^2 + 7^2} = \sqrt{58}$

Cosine is the ratio of the adjacent side to the hypotenuse. Therefore:

$\displaystyle \cos x = \frac{7}{\sqrt{58}}$

Thus:

$\displaystyle \cos \left(90 ^\circ - x\right) = \frac{3}{7} \left(\frac{3}{\sqrt{58}}\right)$

Use a calculator. Hence:

$\cos \left(90 ^\circ - x\right) \approx 0.1688$

4 0

2 years ago

PLEASE HELP

Yuri [45]

To do this, lets identify the slope and the y-intercept.

y = mx + b
y = -1/2x - 2

The slope is -1/2 and -2 is the intercept.

So, it is the 3rd one.

Hope this helps!

3 0

2 years ago

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