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4 years ago

12

How do I do this 7:13 21:39

1 answer:

GarryVolchara [31]4 years ago

5 0

That is a ratio. 7 x 3 = 21 and 13 x 3 = 39.

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Find two numbers, if Their sum is −7 and their difference is 14

Mademuasel [1]

Let
a------------> first number
b------------> second number

we know that
a+b=-7--------> a=-7-b----------> equation 1
a-b=14--------> equation 2

<span>I substitute 1 in 2
</span>
(-7-b)-b=14-------------> -7-b-b=14----------> -7-2b=14-------> 2b=-7-14
2b=-21---------> b=-10.5
a=-7-b-------> a=-7-(-10.5)-----> a=-7+10.5------> a=3.5

the answer is
the two numbers are
a=3.5
and
b=-10.5

6 0

4 years ago

Read 2 more answers

What is the difference of 21 15/16 minus 18 3/4 ?

Advocard [28]

$21 \frac{15}{16}-18 \frac{3}{4}=21 \frac{15}{16} - 18 \frac{3 \times 4}{4 \times 4}=21 \frac{15}{16}-18 \frac{12}{16}=\boxed{3 \frac{3}{16}}$

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4 years ago

Find the measure of the angle x to the nearest tenth. Question 7 options: 33. 5Â° 56. 5Â° 28. 9Â° 44. 3Â°.

Nina [5.8K]

The question is an illustration of right-angled triangles

The approximated value of x is 33.5 degrees

The given parameters are:

$\theta = x$

$Hypotenuse = 58$

$Opposite = 32$

To determine the measure of angle x, we simply make use of the following sine ratio.

$\sin(\theta) = \frac{Opposite}{Hypotenuse}$

So, we have:

$\sin(x) = \frac{32}{58}$

$\sin(x) = 0.5517$

Take arc sine of both sides

$x = \sin^{-1}(0.5517)$

This gives

$x = 33.5$

Hence, the approximated value of x is 33.5 degrees

Read more about right-angled triangles at:

brainly.com/question/16195823

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2 years ago

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aliya0001 [1]

Answer:

tan3x=√3

tan3x=tan60,tan(180+60)

3x=60,240

:.x=20,80is your answer.

c=

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3 years ago

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Maurinko [17]

Answer:

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3 years ago