I really need help with this. Even if it is just one, I would like some help.

Mathematics

1 answer:

nikitadnepr [17]3 years ago

7 0

9514 1404 393

Answer:

7. 45

8. 8

Step-by-step explanation:

The incenter is equidistant from the sides of the triangle. Here, you're given two of the radius measures as expressions in x, and you're asked to find the third. They are all the same, so you can equate and evaluate the expressions.

7. 5x = 3x +18

2x = 18 . . . . . . subtract 3x

x = 9

WR = 3x +18 = 3(9) +18 = 45

QW = 45

8. 15x -37 = 7x -13

8x = 24 . . . . . . . . . . add 37-7x

x = 3

DW = 7x -13 = 7(3) -13 = 8

WE = 8

You might be interested in

Which of the following ordered pairs is not a solution to the equation represented by the graph

givi [52]

I don't know what the ordered pairs are here, but anyone that doesn't end with a three. Example, (1,3) is on the graph. so is (27, 3) y, will always be three:)

3 0

3 years ago

The following table shows the number of innings pitched by each of the Greenbury Goblin's starting pitchers during the Rockbotto

Sedaia [141]

Answer:

Step-by-step explanation

i can help u, but what are the numbers

7 0

4 years ago

Read 2 more answers

The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airp

motikmotik

Answer:

The 95% confidence interval for the population mean rating is (5.73, 6.95).

Step-by-step explanation:

We start by calculating the mean and standard deviation of the sample:

$M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{50}(6+4+6+. . .+6)\\\\\\M=\dfrac{317}{50}\\\\\\M=6.34\\\\\\s=\sqrt{\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M)^2}\\\\\\s=\sqrt{\dfrac{1}{49}((6-6.34)^2+(4-6.34)^2+(6-6.34)^2+. . . +(6-6.34)^2)}\\\\\\s=\sqrt{\dfrac{229.22}{49}}\\\\\\s=\sqrt{4.68}=2.16\\\\\\$

We have to calculate a 95% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=6.34.

The sample size is N=50.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

$s_M=\dfrac{s}{\sqrt{N}}=\dfrac{2.16}{\sqrt{50}}=\dfrac{2.16}{7.071}=0.305$