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3 years ago

Solve for x: X-2/x=5

Mathematics

1 answer:

Nataliya [291]3 years ago

7 0

Let me try all my best for this

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What is vertical distance? is it addition or subtraction

eduard

The vertical distance between two things is

(the height of the top one) <u>minus</u> (the height of the bottom one) .

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3 years ago

If sin(x) = 5/13, and x is in quadrant 1, then tan(x/2) equals what?

Rufina [12.5K]

$x$ is in quadrant I, so $0$ , which means $0$ , so $\dfrac x2$ belongs to the same quadrant.

Now,

$\tan^2\dfrac x2=\dfrac{\sin^2\frac x2}{\cos^2\frac x2}=\dfrac{\frac{1-\cos x}2}{\frac{1+\cos x}2}=\dfrac{1-\cos x}{1+\cos x}$

Since $\sin x=\dfrac5{13}$ , it follows that

$\cos^2x=1-\sin^2x\implies \cos x=\pm\sqrt{1-\left(\dfrac5{13}\right)^2}=\pm\dfrac{12}{13}$

Since $x$ belongs to the first quadrant, you take the positive root ( $\cos x>0$ for $x$ in quadrant I). Then

$\tan\dfrac x2=\pm\sqrt{\dfrac{1-\frac{12}{13}}{1+\frac{12}{13}}}$

$\tan x$ is also positive for $x$ in quadrant I, so you take the positive root again. You're left with

$\tan\dfrac x2=\dfrac15$

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3 years ago

Please hello me I'm confused about this

Margaret [11]

Number 3 is A and number 4 is G, do you want to know how I got my answer...

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3 years ago

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If Eli showed a 8.9% ROI on his $8000.00 investment, how much was his return on his investment

telo118 [61]

8.9% is equal to 0.089 because a percent is over a 100. So, you can just multiply the ROI by the investment to get:

$0.089(8000) = 712$

Your answer is: $712.

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3 years ago

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You have $200 in a savings account.Each week for 8 weeks,you take out $18 for spending money.How much money is in your account a

g100num [7]

The amount of money in your account is mathematically given as

x = $56

This is further explained below.

<h3>What is an account?</h3>

Generally, An account is a term used in accounting to refer to assets, liabilities, income, costs, and equity.

In bookkeeping, an account is represented by a single page in a ledger, and any changes in value are chronologically documented using debit and credit entries.

These entries, which are also known as posts, are added to a book of final entries or ledger and form a part of it.

In conclusion, the amount of money in your account will be

18 * 8 = 144

Therefore

x=200 - 144

x = $56