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Nutka1998 [239]
3 years ago
5

Pls help will give brainliest!!! pls I dont understand

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
4 0

Answer:z=10yd

y=38 degrees

x=90 degrees

w=180-128= 52 degrees

u=6.2yd

v=7.9yd


Step-by-step explanation:


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In January of 2011, the U.S. saw an increase in gas prices. Imagine the average price per gallon was $3.12 with a standard devia
Arada [10]

Answer:

31.92%

Step-by-step explanation:

We are given;

Population mean; μ = $3.12

Sample mean; x¯ = $3.16

Sample size; n = 10

Standard deviation; σ = $0.27

Z-score formula is; z = (x¯ - μ)/(σ/√n)

z = (3.16 - 3.12)/(0.27/√10)

z = 0.04/(0.08538)

z ≈ 0.47

Now, the percent of other sample means, based on 10 gas stations, that would be greater than the one observed is;

P(x¯ > 3.12) = 1 - P(z < 0.47)

From z-table attached P(z < 0.47) = 0.68082

Thus;

P(z > 0.47) = 1 - 0.68082

P(z > 0.47) ≈ 0.3192

This expressed in percentage is 31.92%

4 0
3 years ago
I dont know how to set up this problem. I need help.
Anuta_ua [19.1K]

Answer:

(4)

Step-by-step explanation:

it said that thier old house cost 10,000

thier new house is more than 2 times what thay paid for thier old house

so answer 4 must be it because 3700 is in that number

6 0
3 years ago
A parallelogram has a base of length xplus 7 and a height of xplus 2 and has an area of 50 square units. Find the base and heigh
iris [78.8K]

Hello,


(x+7)(x+2)=50\\\Rightarrow\ x^2+9x+14=50\\\Rightarrow\ x^2+9x-36=0\\\Rightarrow\ x^2+12x-3x-36=0\\\Rightarrow\ x(x+12)-3(x+12)=0\\\Rightarrow\ (x+12)(x-3)=0\\\Rightarrow\ x=-12\ or\ x=3\\If \ x=-12\ then\ x+7

7 0
4 years ago
The temperature was −10 °F and dropped by 16 °F. Which statement represents the resulting temperature in degrees Fahrenheit?
emmainna [20.7K]

Answer:

-26

Step-by-step explanation:

Dropping here means subtracting. That means that we calculate:

-10 - 16 = -26

6 0
3 years ago
A landscaping company placed two orders with a nursery. The first order was for 13 bushes and 4 trees, and totaled $327.50. The
Genrish500 [490]

The system of equations that Sam can use is given by:

A 13b + 4t =327.50, 6b + 2t = 142.96

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, the variables are:

  • Variable b: Cost of a bush.
  • Variable t: Cost of a tree.

The first order was for 13 bushes and 4 trees, and totaled $327.50, hence:

13b + 4t = 327.50.

The second order was for 6 bushes and 2 trees, and totaled $142.96, hence:

6b + 2t = 142.96.

Which means that option A is correct.

More can be learned about a system of equations at brainly.com/question/24342899

3 0
3 years ago
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