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Gelneren [198K]
2 years ago
10

25% of what number is 20?​

Mathematics
2 answers:
kolbaska11 [484]2 years ago
5 0
80 is the number explanation: 25% of 80= 20 hope this helps and if it doesn’t im so sorry!
Ilia_Sergeevich [38]2 years ago
4 0

Answer:

80

Step-by-step explanation:

x*.25=20

x=20/.25

x=80

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Hep please will give brainiest and other!!!
Vaselesa [24]

y = -9

Ok so to write the equation of the line you will need the slope and y-intercept. Since we are given two-point we can easily find the slope by using this equation for slope formula:

\frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

So now that we have our equation we can just plug in the numbers:

\frac{(-9)-(-9)}{5-(-3)}

After subtracting you should get:

0/8

Since zero is in the numerator and you can't divide zero by anything, the slope is 0. We still need the y-intercept for the equation however since the slope is 0 there is no need to put anything else.

Then to find the y-intercept all you have to do is plug in one of the coordinatines into the slope equation to solve, for example, using the point (5,-9):

(-9) = 5(0) + b

B is the variable for the y-intercept. Also notice how I put 0 as our slope into the equation. Now all you have to do is solve for b. Which you would get b = -9. Since you have your slope and your y-intercept now you just write out your equatoin for the line which is:

y = 0x - 9

**Just write it as

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5 0
2 years ago
Read 2 more answers
What is the phase of y= -3cos (3x-pi) +5
ratelena [41]

Answer:

- \frac{\pi}{3}

Step-by-step explanation:

Given

y = -3\cos(3x - \pi) + 5

Required

The phase

We have:

y = -3\cos(3x - \pi) + 5

Rewrite as:

y = -3\cos(3(x - \frac{\pi}{3})) + 5

A cosine function is represented as:

y = A\cos(B(x + C)) + D

Where:

C \to Phase

By comparison:

C = - \frac{\pi}{3}

Hence, the phase is: - \frac{\pi}{3}

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3 years ago
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riadik2000 [5.3K]
I got a different answer..
and i don't see it as one of your choices, also your question is confusing since you're repeating it .-.
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3 years ago
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fenix001 [56]

Answer:

2, 7, 114

Step-by-step explanation:

(3 + 0.5x)(38 - 4x)

114 + 19x - 12x - 2x²

-2x² + 7x + 114

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Hey, can someone help me with this problem?
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