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3 years ago

WILL GIVE BRAINIEST TO THE CORRECT ANSWER!

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

4 0

Answer:

B. Multiplication

Step-by-step explanation:

1+3x+(x*4)

1+3x+4x

You are multiplying x and 4

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Can someone answer this?

nevsk [136]

Answer:

The answer is 8

Step-by-step explanation: Use the KCF method.

Keep the first number, change the second sign into multiplication, and flip the numbers on the third part, so 4/1. Now multiply 2 and 4.

4 0

3 years ago

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A wall with a height of 20 feet is braced with a support post that forms a 30 degree angle with the top of the wall. What is the

dexar [7]

The length of the support post is 40 ft.

<u>Solution:</u>

Given, the height of the wall is 20 ft; support post forms 30 degree

Refer the attached image

Let us name the triangle as ABC where AB is the wall (opposite side) of 20 ft and $\angle A$ is 30 degree ( $\theta$ ) and AC is the length of the post.

To find: The length of the post (AC)

we know the formula, $sin\theta=\frac{opp}{hyp}$ (trigonometric formula)

On substituting the values we get,

$\Rightarrow sin(30^{\circ})=\frac{20}{AC}$

The value of sin 30 degree is 0.5

$\Rightarrow 0.5=\frac{20}{AC}\rightarrow AC=\frac{20}{0.5}\rightarrow AC=40 ft$

3 0

3 years ago

H = 3a + 28.6

sasho [114]

Step-by-step explanation:

the estimated increase in height of baby each year would be 3 inches.

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3 years ago

Convert the complex number z = 4 - 10i from rectangular form to polar form.

mrs_skeptik [129]

ANSWER

$r = 2 \sqrt{29} ( \cos(292 \degree) + \sin(292 \degree))$

EXPLANATION

The polar form of a complex number ,

$z = x + yi$

is given by:

$z = r( \cos( \theta) + i \sin( \theta) )$

where

$r = \sqrt{ {x}^{2} + {y}^{2} }$

The given complex number is:

$z = 4 - 10i$

$r = \sqrt{ {4}^{2} + {( - 10)}^{2} }$

$r = \sqrt{16 + 100}$

$r = \sqrt{116} = 2 \sqrt{29}$

And

$\theta= \tan^{ - 1}(\frac{ y}{x} )$

$\theta= \tan^{ - 1}(\frac{ - 10}{4} )$

$\theta= 292 \degree$

Hence the polar form is :

$r = 2 \sqrt{29} ( \cos(292 \degree) + \sin(292 \degree))$

6 0

3 years ago

Is 5.692 a terminating or a repeating decimal

Ostrovityanka [42]

5.692 is a terminating decimal because the decimal stopped at the digit of 2.

Hope this helps!

7 0

3 years ago

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