8th grade math help pls

Answer: x=-2

Step-by-step explanation:

Answer:

42

Step-by-step explanation:

Let the number be y

178% = 178/100

178% of y = 74.76

178/100 x y = 74.76

178y = 74.76 x 100

y = 7476/178

y = 42

Answer:

9715.25

Step-by-step explanation:

Answer:

9715.25

Step-by-step explanation:

Answer:

Step-by-step explanation:

[tex]\frac{5}{6}m+12-\frac{2}{3}-6[/tex]

*Note that [tex]-\frac{2}{3}[/tex] is equivalent to [tex]-\frac{4}{6}[/tex]*

[tex]Step\ 1\ \frac{5}{6}m+12-\frac{2}{3}m-6 \\\\[/tex]

[tex]Step\ 2\ \frac{5}{6}m-\frac{2}{3}m+12-6 \\\\[/tex]

[tex]Step\ 3\ (\frac{5}{6})(-\frac{2}{3})m+12-6 \\\\[/tex] <== this is where the mistake was made.

[tex]Step\ 4\ -\frac{10}{6}m+6[/tex]

Questions:

1. In which step did the student make her first error?

Explanation: The students made her first error in Step 3 because she multiplied the fractions, instead of subtracting them.

2. Write the correct expression for this step

The correct expression for Step 3:

[tex]Step\ 2\ \frac{5}{6}m-\frac{2}{3}m+12-6\\\\[/tex]

           [tex]\frac{5}{6}m-\frac{4}{6}m+12-6\\\\[/tex]

           [tex]\frac{1}{6}m+12-6\\[/tex]

           [tex]\frac{1}{6}m+6[/tex]  

Explanation: First, I converted [tex]-\frac{2}{3}[/tex] to [tex]-\frac{4}{6}[/tex]. Then subtracted the fraction. After, I subtracted the number (integers).

Hope this helps!

Answer:

no answer no problem sorry

Answer:

40°

Step-by-step explanation:

angle on a straight line = 180°

therefore

140+ m<BAC = 180°

m<BAC = 40°

Answer:

the angle BAC is 40 degrees

Answer:

The median of the first is larger than the median of the second by 12.5

Step-by-step explanation:

A box and whisker plot shows the median by using a line inside the box. Wherever the line is is the median or middle value in an ascending list. Chapter 9 is in between 75 and 80, which would be 77.5, and chapter 10 is aligned with 65, which means that 77.5-65 is 12.5 and the median for chapter 9 is greater than the median of chapter 10 by 12.5. Hope this helps!

Answer:

70%

Step-by-step explanation:

7/10 can be expanded to 70/100 and there it is simpler to see the percentage

Answer:

Under a reflection in the x- axis

a point (x, y ) → (x, - y ), hence

G(- 2, 1) → G'(- 2, - 1)

H(- 7, 4) → H'(- 7, - 4)

[tex]\underline{\underline{\large\bf{Given:-}}}[/tex]

[tex]\red{\leadsto}\:[/tex][tex]\textsf{The given triangle is isosceles triangle } [/tex]

[tex]\sf with \: AB = AC [/tex]

[tex]\green{\leadsto}\:[/tex][tex]\sf m∠B = 76⁰[/tex]

[tex]\underline{\underline{\large\bf{To Find:-}}}[/tex]

[tex]\orange{\leadsto}\:[/tex][tex]\textsf{} [/tex][tex]\sf m∠A [/tex]

[tex]\\[/tex]

[tex]\underline{\underline{\large\bf{Solution:-}}}\\[/tex]

[tex]\longrightarrow[/tex]Since the given triangle is isosceles, the angle opposite to equal sides will be equal

[tex]\quad\therefore[/tex]So, m∠A = m∠C

Now,

By angle sum property of triangle,sum of all angles inside triangle = 180⁰

[tex]\begin{gathered}\\\implies\quad \sf m∠A+m∠C+ m∠B = 180⁰ \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf m∠A+m∠A+ 76 = 180⁰\quad(m∠C=m∠A) \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf 2m∠A = 180 -76 \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf 2m∠A = 104 \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \sf m∠A = \frac{104}{2} \\\end{gathered} [/tex]

[tex]\begin{gathered}\\\implies\quad \boxed{\sf{ m∠A = 52⁰}} \\\end{gathered} [/tex]

Answer:

24 cm²

easy way to find surface area of a cube.

use the formula: 6a²

[tex]\hookrightarrow 6(2)^2[/tex]

[tex]\hookrightarrow 6(4)[/tex]

[tex]\hookrightarrow24[/tex]

We know that:

[tex]\space\ Surface \space\ area \space\ of \space\ cube=\s Area \space\ of \space\ it's \space\ faces[/tex]

This means that:

[tex]\space\ Surface \space\ area = [(2)(2)] + [(2)(2)] + [(2)(2)] + [(2)(2)] + [(2)(2)] + [(2)(2)][/tex]

Simplify the expression to find the surface area.

Simplifying the expression:

[tex][(2)(2)] + [(2)(2)] + [(2)(2)] + [(2)(2)] + [(2)(2)] + [(2)(2)] \\\\\ [4] + [4] + [4] + [4] + [4] + [4]\\\\ 4[6] \\\\ 24 \space\ cm^{2}[/tex]

Hence, the surface area is 24 cm².

Answer:

14

Step-by-step explanation:

Because the median is the middle number when the data set is in order least to greatest so you already have it in least to greatest so thank you for helping me.

and for extra just in case.

Mean=16.222

the mean= the average of the data set

Mode is 13,14

The mode is the number that appears the most in a data set and 13 and 14 appear twice.

Your range is=13

Range is the highest number subtracting the lowest number so 24 -11 which =13

Minimum is 11 because the minimum is the lowest number in data set..

Maximum is 24

Maximum is the highest number in the data set.

I hope this helps have a awesome day:)

The median of the provided data set is 14, as the middle value of this data set arranged in increasing order is 14.

The median of the data set is the middle value of the data when data is arranged in the increasing or decreasing order.

The given data set in the problem is,

[tex][{11, 13, 13, 14, 14, 16, 18, 23, 24}][/tex]

In this data set, there are total 9 values given in which,

The data is arranged in increasing order. As the median of the data set is the middle value of the data when data is arranged in the increasing order.

The middle value of the data set is 5.

[tex]m=14[/tex]

Thus, the median of the provided data set is 14, as the middle value of this data set arranged in increasing order is 14.

Learn more about the median here;

https://brainly.com/question/26177250

Hey there!

1/4 ÷ 5

=> 4/1 × 5/1

=> 20/1

Therefore, 20/1 is the answer

Answer:

[tex]\frac{1}{20}[/tex]

Step-by-step explanation:

[tex]\frac{1}{4}\div 5\\\\ \frac{1}{4}*\frac{1}{5}\\\\\frac{1}{20}[/tex]<== final answer

Hope this helps!

Answer:

=> The third side of the triangle is √53 mm

Step-by-step explanation:

We know that this is a right angled triangle ,

so , by using Pythagoras theorem we can find out the third side of the triangle ,

=> P²+B²= H²

=> 7²+2² = H²

=> 49+4 = H²

=> 53 = H²

=> √53 = H

The third side of the triangle is √53mm

I think the area is 420

Step-by-step explanation:

Answer:

Step-by-step explanation:

(10-6)/(0-24)

=4/(-24)

=0.166

Answer:

48ft²

Step-by-step explanation:

A = a + b / 2 h = 7 + 9 / 2 · 6 = 48ft²

Answer:

You can put the dollars on the y axis and the hours on the x axis. Whenever the hours increase by 1, move over 1 on the x axis and 7.50 up on the y axis.

The first point should be (1, $7.50).

                                        ↑      ↑

                                    hours, money earned

The second point then will be (2, $15.00), the third will be (3, $22.50), and so on.

Step-by-step explanation:

Answer:

7.5 hrs.

Step-by-step explanation:

First we need to find how much Magan earns per hour using the slope-intercept form: y = mx + b

Slope (m) = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]

We will be using: (4, 70.80) and (9, 159.30) to find the slope of this table..

[tex]m=\frac{y_2-y_1}{x_2-x_1} \\\\m=\frac{159.30-70.80}{9-4} \\\\m=\frac{88.50}{5} \\\\m=17.7[/tex]

y = mx + b

y = 17.7x + b

I will be using (4, 70.80) to find the value of b

(4, 70.80)

y = 17.7x + b

70.80 = 17.7(4) + b

70.80 = 70.80 + b

-70.80  -70.80

0 = b

y = 17.7x + b ==> y = 17.7x + 0 =  OR  y = 17.7x (since the value of b is 0)

The question wants us to find out how long it took Magan to make $132.75

y = 17.7x

132.75 = 17.7x

/17.7        /17.7

7.5 = x

This means that it took him 7.5 (seven and a half) hours to make $132.72

*View the attached graph to confirm the answer*

Hope this helps!

Answer:

7.5 hrs.

Hope this helps! Good luck! :)

Answer:

The surface area of the cylinder is about 439.823 m^2, so rounded to the nearest square meter would equal about 440 m^2.

Answer:

c 200.96 cm2

Step-by-step explanation:

i take the test

so the mean is 20 standard deviation is undefined

Answer: 4.32432 inches

Step-by-step explanation:

This is a simple ratio problem:

we are given the old dimensions:

L x W = 1.818 x 4.848

new   = 1.62162 x ?

? = (1.62162 x 4.848)/1.818 = 4.32432

The width of the new phone should be 4.32432 inches

Answer:

b. =

Step-by-step explanation:

First, we have to figure out 7.15x10^5.

10^5=100,000

100,000x7.15=715,000

So, 715,000 is equal to 7.15x10^5.

715,000=7.15x10^5

Hope this helped...have a nice day c:

Answer:

b)=

Step-by-step explanation:

7.15* 10^5=

10^5= 100000

(1 with 5 zeros at the end)

7.15*100000= 715,000

715,000 compared 715,000:

715,000 = 715,000

Answer:

1. Changing speed. It does not stay constant instead it changes speed.

2. 1.86

Step-by-step explanation:

You would find how much it multiples by on the chart to the left and find its never the same number which would make it change speed but also for number 2 you would put all the numbers in order that you have gotten and the middle number would be your average.

Hope this helps

Have a good day!