Mathematics Middle School

Nigel tried to solve an equation step by step.
1/2(2h-4)=20

2h−4=10 step1
2h=14 step2
h=7 step3
​
Find Nigel's mistake.




​

​

Answers

Answer 1

Answer:

In the first step, Nigel didn't distribute 1/2 into the brackets.

Answer 2
First multiply both sides by 2(he didnt do it)
2*1/2(2h-4)=20*2
2h-4=40
2h=44
h=22

Related Questions

1. The area of this trapezoid is.


What is the height of the trapezoid? Show your work.
Answer:

Answers

Answer:

5.1

Step-by-step explanation:

3.2 + 7= 10.2

10.2 ÷ 2= 5.1

Formula: A=1/2h(b1 + b2)

(NEED !) 1. Haley needs to get a ride home from the airport she wants to use a rideshare company, but she needs to choose between two different companies Company A charges a flat fee of $10 plus $0 50 per mile
Company B charges a flat fee of $8 plus $0.75 per mile Let zrepresent the number of miles of a ride, and let y represent the total price paid for a ride
The system of equations below represents this situation
Company A -0.50 + 10
Company B y 0.75 +8

(answer choices in picture)

Answers

Answer:

Where is the picture?

Step-by-step explanation:

Curt’s kite is 48 yards above the ground, and directly above a tree. The length of the string from Curt to the kite is 52 yards. How far is Curt from the tree?

Answers

Answer:

he is 4 feet

Step-by-step explanation:

52 minus 4 is 48 so...

Thirty percent of the beads in a bag are blue. One bead is randomly chosen and replaced. Then a second bead is chosen. What is the probability that neither is blue?

Answers

Answer:

Answer: 12%

Step-by-step explanation:

To find the probability of picking not only a sphere but one that is blue as well, you need to multiply the probabilities of both events because this would show the probability of getting the second event if the first is gotten:

= Probability of sphere * Probability that sphere is blue

= 40% * 30%

= 12%

Step-by-step explanation: i think im right

What is the y-intercept, axis of symmetry and vertex of the following function.

[tex]F(x)=-3x^{2} -6x-5[/tex]

I will give brainilst help please

Answers

To find the y intercept you must substitute 0 into x.

F(x) = (-3x0) - (6x0) - 5
F(x) = -5

To find the axis of symmetry and vertex we use the formula -b/2a to find the x coordinate

x = 6/(-3x2)
x = 6/-6
x = -1

Now we need to find the y coordinate so we sub -1 into x.

F(x) = (-3x-1) - (6x-1) - 5
F(x) = 3 + 6 - 5
F(x) = 4

The axis of symmetry and vertex are (-1,4) and the y coordinate is -5. Hope this helps.
Y intercept = 5
Axis of sym = -1
Vertex = (-1, -2)

Sierra had 136 trading cards. She gave away 15 to each of her 3 friends. Which expression shows how many cards Sierra has left?

A. 136 - ( 15 x 3 )
B. 136+ ( 15 x 3 )
C. ( 136 - 15 ) x 3
D. ( 136 + 15 ) x 3

Answers

A
Because 136 trading cards
15 goes to each 3 friends
It would be A :)

The expression 136 - (15 x 3) shows she started off with 136 cards but gave away 15 cards each to 3 of her friends

PLEASE HELP I WILL GIVE BRAINLIEST

Answers

B is the answer to this question

Answer:

Non Proportional

y=4x+5

FIRST ANSWER GETS BRAINLY 100 POINTS
The cost of cellular service is proportional to the number of minutes provided per month. It does not cost anything when no minutes are used. What does the ordered pair (400, 120) represent in the context of the situation?
A. It represents the cost of the plan if 400 minutes are used.
B. It represents the cost of the plan if 120 minutes are used.
C. It represents the number of minutes used in a month.
D. It does not represent anything since the point is not on the line.
PLEASE EXPLAIN YOUR ANSWER!

Answers

Answer:

A. It represents the cost of the plan if 400 minutes are used.

Step-by-step explanation:

It's A. because on the graph it shows that 400 is on the minute line and the 120 is most likely the cost.

I think.

Answer:

the answer is a

Step-by-step explanation:

In this case the 400 is an x value representing the amount of minutes and 120 is a y value representing the cost. The 120 is dependent on the 400 proving that the answer is a. I hope that helped :))

Which is greater: 25% of 15 or 15% of 25? Explain your reasoning using mathematical evidence or visual models.

Answers

15% of 25 is the greatest of the two.

Answer:

25% of 15 is 3.75

15% of 25 is also 3.75

15 - 3.75 = 11.25

25 - 3.75 =21.25

Compare and then determine.

11.25 < 21.25

Answer: 25% x 15=25/100 x 15=.25 x 15=3.75

15% x 25=15/100 x 25=.15 x 25=3.75

Now you can clearly see that they are the same.

Step-by-step explanation:

HELP
i suck at this and dont understand so its really helpfull if you explain it

Answers

Answer:add the area of all 3 faces then label them length width height then use the formula SA=2lw+2lh+2hw, and u wil get ur awnser

Step-by-step explanation:

hopefully this helps

Which of the following explains why China set up the one-child policy?

a It needed to expand trade with the West.

b It struggled to support a large population.

c It wanted only a certain race in China.

d It was pushing to grow at a faster rate.

Answers

The answer to the question is
B.
The answer is B as with an ever increasing population they did not have the recourses to sustain so many people leading to vast starvation and homeless rates but the reason this policy didn’t work is because people were killing their girl babies in hopes of a first born male which led to not enlighten females

2. What is the surface area of the ball shown?
Use 22/7 for pi and round to the nearest
whole number.
Radius is 9 centimeters.

Answers

Answer:

1018

Step-by-step explanation:

Surface area of a sphere is [tex]4\pi r^{2}[/tex]

So, for this question [tex]\pi[/tex] is equal to 22/7

Therefore, 4 multiply 22/7 multiply [tex]9^{2}[/tex]

Answer= 1018.285714

Answer to the nearest whole number = 1018

Find the area of the circle. Round your answer to two decimal places, if necessary.

Answers

Answer:

A = 12.57

Step-by-step explanation:

area of a circle = pi r squared

Radius (r) = half the diameter

Diameter is 4mm

Radius is 2mmA=pi2squared

A=12.56637061

HELP THIS IS DUE TODAY?!

Answers

52.5 Yards (yd).

7 + 7 = 14

14 + 14 = 28 ( 10 + 10 + 4 + 4)

14 + 28 = 42 (4 - 2 + 8 = 10 + 20 + 10)

42 + 10.5 = 52.5

⚠⚠ if you need to multiply this by itself (squaring is the proper name) then the answer is 2756.25 Yards.

Help label all of these plsssss

Answers

Answer:

Thw answer is 5 1/2, 2 1/2 Next, is 11,5 Then, 16 1/2, 10 1/2 Lastly, 22,21

Step-by-step explanation:

Write each of the following expressions in the form of Ax^m y^n, where A is a real number and m and n are integers. (x^2y)÷(2yx^-2)

Answers

the answer is 1/2x4y0 the answer is in the image above

What is the sing for pi

Answers

Sine or Sin of pi is 0.
Pi is 180 degrees.
Check on unit circle or calculator.

A Fraction of the Fair
1. Use a line plot to represent the data in the data set. Be sure to include a title and label all tick marks.
2. What is the largest amount of snow that fell in one day?
3. What is the least amount of snow that fell in one day?
4. How many days did it snow 3 inches?
5. A new piece of data was recorded and added to the line plot. The dierence between the largest and
smallest amounts of snow is now 3. What could the new values of the data be?
1
4
2
Snowfall in January
4 1 in 3
4 2 in 3
4 2 in 3
4 2 in 3 in 1
4 3 in 2 in 3 in
3
4 1 in 3
4 2 in 1
4 3 in 1
4 2 in 1
4 2 in 3
4 2 in 2
4 3 in
3
4 1 in 3 in 1
4 3 in 1
4 2 in 2
4 2 in 3
4 3 in 3
4 3 in

Answers

Answer: new piece of data was recorded and added to the line plot. The difference between the largest and smallest amounts of snow is now 3.

Step-by-step explanation:

Answer ASAP and whoever answers correctly can have brainliest

Answers

Answer:

d

Step-by-step explanation:

Answer: D 0.05, 0.0516, 16%, 5/16, 5.16

What is the sum of the length of the longest meteor and the length of the shortest meteor?

Answers

Answer:

2 1/8

Step-by-step explanation:

2/8

+1 7/8 the denominator will stay the say and will become

= 2 1/8

a + 6.6 = 12.6 helpp please !

Answers

Answer:

it is 6

Step-by-step explanation:

because if you subtract 12.6 - 6.6 = 6 so 6 + 6.6 is 12.6

Answer:

A = 6

Step-by-step explanation:

To solve the equation A + 6.6 = 12.6, you need to isolate the variable "A," which represents an unknown value.

Subtract 6.6 from both sides of the equation:

=> A + 6.6 - 6.6 = 12.6 - 6.6

Simplifying this equation gives:

=> A = 6

Therefore, the solution to the equation A + 6.6 = 12.6 is A = 6.

I will give brainliest + 50pts
Write a function h to model the vertical motion for the situation. Find the maximum height.

Initial velocity= 200ft
Initial hight= 5ft

Answers

Answer:

During halftime of a basketball ​game, a sling shot launches​ T-shirts at the crowd. A​ T-shirt is launched with an initial upward velocity of 78 feet per second. The hight of the t-shirt (h) in feet after t seconds is given by the function h=-16t^2+78t+5. How long will it take the​ T-shirt to reach its maximum​ height? What is the maximum​ height? What is its maximum height?

Step-by-step explanation:

cool

Estimate the solution of the system of equations. Write the answer as an ordered pair.

Answers

Answer:

Solution of the given system of equations is (1, 2.5)

Step-by-step explanation:

From the graph attached,

Two intersecting lines represent the system of equations.

And the solution of the system of equations is a common point where these lines intersect.

Graph shows both the line are intersecting each other at (1, 2.5).

Therefore, solution of the given system of equations will be (1, 2.5).



Will give brainlist if possible!!
Solve the system of equations by substitution

Answers

Answer:

x = 4

y = 30

Step-by-step explanation:

Since y = 8x - 2, substitute into 2nd equationThis gives you 3x + 8x - 2 = 42Add 2 to both sides11x = 44Divide both sides by 11x = 4Put this value into either equationI choose the first oney = 8x - 2 = 8 × 4 - 2 = 32 - 2 = 30

Answer:

x=4

y=30

Step-by-step explanation:

First re-write the system like this:

[tex] - 8x + y = - 2 \\ 3x + y = 42[/tex]

Now substitute them together:

[tex] - 11x = - 44[/tex]

So

[tex]x = 4[/tex]

put x=4 in one of the equations

[tex]3(4) + y = 42 \\ \\ y = 30[/tex]

so

x=4

y=30

Does the equation y=18x represent a proportional relationship? Check all that are true.

A) No, the graph of the equation does not pass through the origin.
B) Yes, the graph of the equation is a straight line
C) Yes, the graph of the equation passes through the origin.
D) No, the graph of the equation is not a straight line.

Answers

C yes the graph of the equations passes through the origin
The answers c I’ve done the test before

Can someone help me D: it's math (if you don't know, I'm terrible at math, so please help lol)
the assignment download is here, thanks :D

Answers

This is the most easiest for one I can help you but on one condition you give brainlest and points as I requested Thanks!

So the basic idea of this type of math is if you know how to multiply you are gonna KEEP CHANGE and Flip. Keep the number chand the division sign to a multiplication sign or vise versa the Flip the fraction where the denominator is offically the numerator.

Example 1:

4 divided by 1/2

KEEP CHANGE FLIP

4 x 2/1 =8/1 or 8

See its that simple!

Here is you math

Oh and I did the liberty of Showing you how to do the math problems.

Pls give brainlest

I can’t see the download, what was the question?

Based on the order of operations, which is the first step in simplifying this expression? 9 + 5 x 2(20/4 - 2 + 1)

Answers

Answer:

(Parentheses)                P.E.M.D.A.S   Exponents(^)Multiply(X)Division(/)Addition(+)Subtraction(-)

Step-by-step explanation:

First simplify (20/4-2+1)=

9+5x2(4)=

then simplify again

14x8=112

simplify one more time and you get your answer.

122 is your answer.

So to answer the real question start with parentheses first then work and simplify the equation.

Please give brainliest if you found this answer to be helpful!

math problem please help me

Answers

im not sure how to do this can you be more specific?

volume is 301.592894745 (Pie times 16 (4^2) times 6)
surface area is 251.327412287 (Pie times 16(4^2) + Pie times 16(4^2) + 2 times pow times 6 times 4

The dot plot below shows Angela's bowling scores for her last ten games.
What is the mean absolute deviation of the data set shown?
A. 2
B. 4
C. 8
D. 152

Answers

Answer:

8

Step-by-step explanation:

Help!! (You will get 100 points! & Brainliest if you are correct)

7TH GRADE MATH | Mrs. Bront
1.
The first sequence rule is multiply by 4 starting from 7. The second sequence rule is add 5 starting from 8. What is the first number that appears in both sequences?

Answers

Answer: The first number that appears in both sequences is 28.

Step-by-step explanation:

Let's write down numbers from each of the sequences

Sequence 1) We need to start from 7 and multiply 4

7x4=28, 28x4=112

The sequence is 7,28,112...

Sequence 2) We need to start from 8 and add 5

5+8=13, 13+5=18, 18+5=23, 23+5=28

The sequence is 8,13,18,23,28...

They both have 28

28 is the first number that appears in both sequences.

multiply by 4 starting from 7

First sequence: 7 * 4 = 28 *4 = 112 * 4 = 448

add 5 starting from 8

Second sequence: 8 + 5 = 13 + 5 = 18 + 5 = 23 + 5 = 28
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