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Mariana [72]
3 years ago
6

The equation 4x-45=y is used to find your profit y in dollars from buying $45 of supplies and washing cars for $4 what does the

x stand for
Mathematics
1 answer:
Mrrafil [7]3 years ago
5 0
33333333333333336666666666
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Ariel, who is 15, is 3 years more than<br> twice the age of Hilary. How old is<br> Hilary?
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Answer:

6

Step-by-step explanation:

15 - 3 = 12, divide that by 2 and your answer is 6.

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Find the value of x and the value of y.
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3 years ago
Slader records show that the average life expectancy of a pair of shoes is 2.2 years with astandard deviation of 1.7 years. A ma
Oksanka [162]

Answer:

For every 1000 pairs sold, the manufacturer expect to replace 239 pairs for free.

Step-by-step explanation:

Given:

Mean (μ) = 2.2, Standard deviation(S.D) (σ) = 1.7 years and x = 1 (1 year)

Let's find the Z score.

Z = \frac{x - mean}{S.D}

Now plug in the given values in the above formula, we get

Z = \frac{1 - 2.2}{1.7} = -0.71

Now we have to use the z-score table.

The z-score for 0.71 is 0.2611

Since it z is negative, so we subtract 0.2611 from 0.5000

0.5000 - 0.2611 = 0.2389

Percentage = 0.2389 × 100 = 23.89%

To find replaces for 1000 pairs, we need to multiply 23.89% by 1000

= \frac{23.89}{100} .1000 = 238.9

= 239

The cannot be in decimal, when we round off to the nearest whole, we get

239

3 0
3 years ago
A man is lying on the beach, flying a kite. He holds the end of the kite string at ground level and estimates the angle of eleva
Ulleksa [173]
This question uses trig

sin(55) = height/195

Therefore, height = 195sin(55) meters (just plug in calculator)
7 0
2 years ago
A number is increased by 54. The sumos then divided by 9. The result is 21. Write an equation to represent the discription, use
hram777 [196]

Answer:

  (n+54)/9 = 21

Step-by-step explanation:

A number: n

Is increased by 54: n+54

The sum is divided by 9: (n +54)/9

and the result is 21:

  (n +54)/9 = 21

6 0
3 years ago
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