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3 years ago

10

What's the rule, and answer n

1 answer:

Alexxandr [17]3 years ago

4 0

X-7 is the rule. n is 21

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Is there a difference between 2x+3 and 3+2x?

pishuonlain [190]

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no

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its just set up different

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3 years ago

Find the least common denominator of 11/10 and 1/15

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2 years ago

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What is _- 20 - 3 1/4 = 14 5/8

dem82 [27]

Answer:

x=303/8

Step-by-step explanation: Yes, I know it looks weird but this is what my calculations have told me. I plugged that number back into the equation and it works so it should be correct unless I misread your question.

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3 years ago

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

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

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3 years ago

Write Ef as the sum of unit vectors E(-5,-2,4) and F(6,-6,6).

dexar [7]

Answer:

B. 11i-4j+2k

Step-by-step explanation:

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3 years ago