Can someone solve this problem for me please?

What is the value of x?

lara31 [8.8K]

Hello from MrBillDoesMath!

Answer:

x = 12

Discussion:

From the diagram, the two triangles appear to be similiar. Then

28/7 = (6x + 28) /25

as the ratio of corresponding parts of similar triangle are the same.

28/7 = (6x +28)/25 => simplify. 28/7 = 4

4 = (6x + 28)/25 => multiply both sides by 25

4*25 = 6x + 28 => simplify, 4 * 25 = 100

100 = 6x + 28 => subtract 28 from both sides

100 -28 = 6x => simplify. 100 - 28 - 72

72 = 6x => divide both sides by 6

72/6 = 12 = x

Thank you,

MrB

5 0

2 years ago

Read 2 more answers

Please help me.

sergey [27]

I don’t know if you are in a

6 0

2 years ago

2/3 is what percent of 1/4

asambeis [7]

Answer:

267%

Step-by-step explanation:

you need to divide the second number by the first. This will give you the percentage.

2/3 ÷ 1/4 = 8/3 = 2.67 = 267%

6 0

3 years ago

a. Fill in the midpoint of each class in the column provided. b. Enter the midpoints in L1 and the frequencies in L2, and use 1-

Tresset [83]

Answer:

$\begin{array}{ccc}{Midpoint} & {Class} & {Frequency} & {64} & {63-65} & {1} & {67} & {66-68} & {11} & {70} & {69-71} & {8} &{73} & {72-74} & {7} & {76} & {75-77} & {3} & {79} & {78-80} & {1}\ \end{array}$

Using the frequency distribution, I found the mean height to be 70.2903 with a standard deviation of 3.5795

Step-by-step explanation:

Given

See attachment for class

Solving (a): Fill the midpoint of each class.

Midpoint (M) is calculated as:

$M = \frac{1}{2}(Lower + Upper)$

Where

$Lower \to$ Lower class interval

$Upper \to$ Upper class interval

So, we have:

Class 63-65:

$M = \frac{1}{2}(63 + 65) = 64$

Class 66 - 68:

$M = \frac{1}{2}(66 + 68) = 67$

When the computation is completed, the frequency distribution will be:

$\begin{array}{ccc}{Midpoint} & {Class} & {Frequency} & {64} & {63-65} & {1} & {67} & {66-68} & {11} & {70} & {69-71} & {8} &{73} & {72-74} & {7} & {76} & {75-77} & {3} & {79} & {78-80} & {1}\ \end{array}$

Solving (b): Mean and standard deviation using 1-VarStats

Using 1-VarStats, the solution is:

$\bar x = 70.2903$

$\sigma = 3.5795$

<em>See attachment for result of 1-VarStats</em>

8 0

2 years ago

1. Which of the following is the sale price for an item with an original price of $8.95 after it has been discounted 40%?

dsp73

Hey there!

1, 8.95*.4= 3.58 was take off. 8.95-3.58= 5.37
$5.37

2.<span>A change from 85 to 72 represents a negative change (decrease) of -15.294117647058824%</span>

8 0

2 years ago