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3 years ago

A number y decreased by 9 is 8 An equation that represents this sentence

Mathematics

1 answer:

Masja [62]3 years ago

8 0

Answer:

Y-9=8

Step-by-step explanation:

Y is decreased by 9 in just say 9 is subtracted by y

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Am I dealing with harmonic stuff (trig)?

pochemuha

You just need to solve for when $y=0$ :

$\dfrac{\cos8t-9\sin8t}4=0\implies\cos8t-9\sin8t=0$

$\implies\cos8t=9\sin8t$

$\implies\dfrac19=\dfrac{\sin8t}{\cos8t}=\tan8t$

$\implies8t=\tan^{-1}\dfrac19+n\pi$

$\implies t=\dfrac18\tan^{-1}\dfrac19+\dfrac{n\pi}8$

where $n$ is any integer. We only care about when $0\le t\le1$ , which happens for $n\in\{0,1,2\}$ .

$t=\dfrac18\tan^{-1}\dfrac19\approx0.01$

$t=\dfrac18\tan^{-1}\dfrac19+\dfrac\pi8\approx0.41$

$t=\dfrac18\tan^{-1}\dfrac19+\dfrac\pi4\approx0.80$

8 0

3 years ago

A rectangle's length is seven times its width. The perimeter of the rectangle is one hundred sixty feet.

Arada [10]

Answer:

Area=700 square ft

4 0

3 years ago

ASAP! GIVING BRAINLIEST! Please read the question THEN answer correctly! No guessing. Show your work or give an explaination.

exis [7]

Answer:

C. The meeting will be in Los Angeles California on July, 17.

Step-by-step explanation:

This doesn't use commas correctly because there should be a comma after Los Angeles because it is a location. Also, there should not be a comma after 17 because the comma goes after the date when the year is included, which it is not.

8 0

3 years ago

Explain how to rewrite the equation -2x - 6y = 18 in slope-intercept form.

MrMuchimi

Answer:

y = -1/3x -3

Step-by-step explanation:

-2x - 6y = 18

We want to solve for y since the slope intercept form is y =mx+b where m is the slope and b is the y intercept

Add 2x to each side

-2x-6y +2x = 2x+18

-6y = 2x+18

Divide each side by -6

-6y/-6 = 2x/-6 + 18/-6

y = -1/3x -3

This is in slope intercept form with the slope -1/3 and the y intercept -3

4 0

3 years ago

Read 2 more answers

Ian paints /8 of a fence. Anna paints 3/4 of another fence. Draw a number line to show that Ian and Anna have painted the same a

ollegr [7]

Answer:

See attachment for number line

Step-by-step explanation:

Given

$Ian = \frac{6}{8}$

$Anna = \frac{3}{4}$

Required

Number line to represent both amounts

The interval on the number line is 16.

So, we need to calculate the position of both as thus.

$Ian = \frac{6}{8} * 16 = \frac{96}{8} = 12$

$Anna = \frac{3}{4} * 16 = \frac{48}{4} = 12$

So, both will be positioned on the 12th position.

The yellow dot represents Anna while the blue dot represents Ian

<em>See attachment for their position on the number line</em>

6 0

3 years ago