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Angelina_Jolie [31]
3 years ago
9

The area of the rectangle is 70 yd2. What is the length of side y? i cant upload the picture sadly :(

Mathematics
1 answer:
goldenfox [79]3 years ago
8 0
I think side y will be 17.5
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-1/2(-3y+10) i need help combining like terms to create a equivelent expression
Vaselesa [24]

Answer:

1.5y - 5

Step-by-step explanation:

I used the distributive approach and distributed -1/2 to the -3y and 10.

(If you try this and it's incorrect, you may just need to distribute -1/2 to the 10, creating -3y - 5.)

6 0
2 years ago
Help help I need to find the height of a cylinder helppp<br> The volume is 1215<br> The radius is9
Naddika [18.5K]

Answer:

15

Step-by-step explanation:

Its pretty simple, u need to learn this.

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Area of circle is π times radius square.

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2 years ago
The manager of a supermarket would like to determine the amount of time that customers wait in a check-out line. He randomly sel
garri49 [273]

Complete question:

The manager of a supermarket would like to determine the amount of time that customers wait in a check-out line. He randomly selects 45 customers and records the amount of time from the moment they stand in the back of a line until the moment the cashier scans their first item. He calculates the mean and standard deviation of this sample to be barx = 4.2 minutes and s = 2.0 minutes. If appropriate, find a 90% confidence interval for the true mean time (in minutes) that customers at this supermarket wait in a check-out line

Answer:

(3.699, 4.701)

Step-by-step explanation:

Given:

Sample size, n = 45

Sample mean, x' = 4.2

Standard deviation \sigma = 2.0

Required:

Find a 90% CI for true mean time

First find standard error using the formula:

S.E = \frac{\sigma}{\sqrt{n}}

= \frac{2}{\sqrt{45}}

= \frac{2}{6.7082}

SE = 0.298

Standard error = 0.298

Degrees of freedom, df = n - 1 = 45 - 1 = 44

To find t at 90% CI,df = 44:

Level of Significance α= 100% - 90% = 10% = 0.10

t_\alpha_/_2_, _d_f = t_0_._0_5_, _d_f_=_4_4 = 1.6802

Find margin of error using the formula:

M.E = S.E * t

M.E = 0.298 * 1.6802

M.E = 0.500938 ≈ 0.5009

Margin of error = 0.5009

Thus, 90% CI = sample mean ± Margin of error

Lower limit = 4.2 - 0.5009 = 3.699

Upper limit = 4.2 + 0.5009 = 4.7009 ≈ 4.701

Confidence Interval = (3.699, 4.701)

5 0
3 years ago
Ava has two frogs. This is 1/4 the number of frogs that Heather has. How many frogs does Heather have?
oksano4ka [1.4K]

Answer:

8

Step-by-step explanation:

2 x 4

7 0
3 years ago
Read 2 more answers
Helppppp will give brainliest
Ivahew [28]

Answer:

Option C is correct.

Step-by-step explanation:

In an inverse variation, an increase in one quantity leads to a corresponding decrease in the other.

The product is constant throughout the table.

The product is 960

and it shows inverse variation also.

6 0
2 years ago
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