Mathematics Middle School

- 7th Grade Work -

Please help ; - ;

- 7th Grade Work - Please Help ; - ;

Answers

Answer 1

Answer:

$12x + $33.75

Step-by-step explanation:

Okay so if you have (16x + 58.75) - (4x + 25)

first you add the common variables so... 16x - 4x = 12x

and 58.75 - 25 = 33.75

And 1 the most common mistake is that people add 25 and 58.75. The reason you don't do this is because the two equations are subtracting or trying to find the difference regardless of whether the numbers are positive or not. Although if they were negative numbers you would be adding.

I hope this helps :)

Related Questions

How do I take a sales discount off a sales total? -Ex
sales total: 2.00
discount: 20%

Answers

I believe you would subtract the total by the discount EX: 2.00-20%=1.6
20% is 1/5 of 100%, so figure out what 1/5 of 2 is. Then, subtract that number by 2.

I forgot how to do this. Help me plzzzzzz

Answers

Answer:

J

Step-by-step explanation:

-5 The answer is -5 because you want to get 1 in the end.

The dot plots below show the scores for a group of students who took two rounds of a quiz:

Which of the following inferences can be made using the dot plot?

The range of each round is the same.
There is no overlap between the data.
Round 1 scores were higher than round 2 scores.
Round 2 scores were lower than round 1 scores.

Answers

Because the range is the highest number minus the lowestAnswer: The range of each round is the same.

Step-by-step: Because the range is the highest number minus the smallest number so for round one that would be 8-5 Which is three and for round two 9-6 which is also three.

Answer:

A) the range of each round is the same

Step-by-step explanation:

***WILL MARK BRAINLIEST*** Write in Scientific Notation! #2

Answers

1) 50,400,000 or 5.04 x 10^7

2) 820,000 or 8.2 x 10^5

3) 0.0000334 or 3.34 x 10^-5

Good luck! :)))
1. 3400470
2.820000
3. About 3.34 times 10 to the -5th power

A music store bought a CD set at a cost of ​$20. When the store sold the CD​ set, the percent markup was ​%20. Find the selling price.

Answers

Answer:

$24

Step-by-step explanation:

20 * (1 + 0.2) = 24

Answer:

22

Step-by-step explanation:

20+ 20% =22

20% is 0.2 so your answer is 22 dollars

Donna made a picture frame as a gift for her mom. To make it more stable, she wants to add a brace to the back of it running diagonally from one corner to the other. About how long does that brace need to be?
A) 41 in
B) 82 in
C) 4.5 in
D) 29 in

Answers

Answer:

I think C is the correct answer

C is the correct answer i believe!

Please do this for me I’m having a very hard time and failing math because of this!

Answers

Answer:

Remember The distance, speed, time triangle

Step-by-step explanation:

Formula is

Speed x time=distance

Distance divided by speed=time

distance divided by time=speed

Please answer 4-8 much appreciated!

Answers

4. 9
5. 2.4
6. 33.6
7. 5x = 85
8. 30(7) = t

I made a mistake on my last question but math question under the cut

Answers

Answer:

what is the question?

Step-by-step explanation:

7th grade math help please and thank you

Answers

Answer:

66+24

Step-by-step explanation:

you just have to add them

Answer:

78 and 12

Step-by-step explanation:

I hope this is right it was a little tricky to find out.

Hope this helps!

Find the greatest common factor of 20 and 32

Answers

Answer:

4

Step-by-step explanation:

Answer: 4

Step-by-step explanation:

Mrs. Byrne is at her house. She gets in her car and drives north 3.4 miles and stops at Target. Then she turns around and drives south 6.1 miles to go to Mrs. Mangini's house. How far is Mrs. Byrne's house from Mrs. Mangini's house? *
9.3 miles
3.3 miles
2.7 miles

Answers

Answer:

3.3 was as far of miles. .

Considering she turned around to get to Mrs. Manini’s house you would subtract 3.4 from 6.1, therefore 2.7 miles is the answer

find his error and correct it plz i beg help me i will give brainlist and points

Answers

Answer:

she didn't use distribution on the beginning of the equation

Step-by-step explanation:

6(x + 3) = 21

6x + 18 = 21

6x (+18 - 18) = 21 -18

6x = 3

6x/6 = 3/6

x = 0.5

6 (0.5 + 3) = 21

6(3.5) = 21

21 = 21

You have to multiply 6 by each number in the parentheses first so 6x + 18=21. subtract 18 by 18 it will cancel out then subtract it by 21 you will get 6x= 3. Then divide by 6 to get x=3/6

PLEASE HELP MEEEEEEeeeeeeeeeee​

Answers

Answer:

look at the picture i have sent

How is the number 0.000005 written in scientific notation?
A. 5.0 x 10-5
B. 5.0 x 105
C. 5.0 x 10-6
D. 5.0 x 106

Answers

Answer:      The answer is A. 5.0 x 10-5

i hope it helps. Have a nice day                                                                                                                  

Step-by-step explanation:

the decimal number 0.00005 written in scientific notation is 5 × 10-5

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10

. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

5×10^6

what does c=2.5b+70 c=5b+60 equal

Answers

C=80 and D=4
Yw have a nice day:)

What is the length of the hypotenuse for a right triangle with legs of length 7 and 24?
●25
● 26
● 27
● 28​

Answers

Answer:

The answer is 25.

Step-by-step explanation:

You can use the pythagorean theorem to figure out this question.

25
7^2+24^2=C^2
49+576= C^2
625=C^2
C=25

According to the line plot, how many runners ran 1/2 of a mile for their warm-up?


(WILL GIVE BRAINLYIEST TO BEST ANSWER)

Answers

Answer:

3 runners

Step-by-step explanation:

As shown in the graph, there are three x's associated with the 1/2 mile warm-up. Hope this helped!

Answer:

there are 3 runners that ran the 1/2 of a mile for their warm up.

Step-by-step explanation:

if you look at the picture below you will see the number 1/2 at the end and when you look  above that there are 3 x's so therefore the answer is 3 runners.  

≪ ≫

   

What happens when there is another sign in front of an integer?
Ex: +(-3)

Answers

Answer:

-3

Step-by-step explanation:

To add integers with different signs, keep the sign of the number with the largest absolute value and subtract the smallest absolute value from the largest. Subtract an integer by adding its opposite.

                 -From Khan Academy-

-3 is the answer !!!!

a=1/2pa, solve for p
NO LINKS PLEASEE!! IM BEGGING YOU NO LINKSS!!!

Answers

Answer:

A = (1/2)Pa = Pa/2

 

You can multiply both sides by 2 to eliminate the fraction on the right side:

 

2A = 2(Pa/2) = Pa

 

Then divide both sides by a (or multiply both sides by 1/a) to leave P alone on the right side:

 

(2A)(1/a) = 2A/a = (Pa)(1/a) = P

 

Rewriting:

 

P = 2A/a

 

You could also have divided by a first then multiplied by 2; which you should do first does not matter in this example.

Step-by-step explanation:

Convert these to Distance in scientific notation

108 million km
150 million kilometers
229 million km
779 million km
1.4 billion km
2.88 billion km
4,503,443,661 km

Answers

How many miles in 1 km? The answer is 0.62137119223733. We assume you are converting between mile and kilometre. You can view more details on each measurement unit: miles or km The SI base unit for length is the metre. 1 metre is equal to 0.00062137119223733 miles, or 0.001 km. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between miles and kilometres.
im not sure lolilolol

What is the area of the parallelogram *

19 sq cm
32 sq cm
56 sq cm
28 sc cm

Answers

area = base times height, or 8 cm times 4 cm, or 32 cm^2

Find the value of x:

Answers

Answer:

x = 3

Step-by-step explanation:

These angles are vertical angles. Vertical angles equals to on another but on the opposite side. Since they equal to another you do:

(10x + 1) = (12x - 5)

Add 5 on both sides:

10x + 6 = 12x

Subtract 10x on both sides:

6 = 2x

Divide 2 on both sides:

3 = x

Answer:

(10x+1)°=(12x-5)°. [vertically opposite angle]

1+5=12x-10x

6= 2x

3=x

therefore,x=3

(Middle school math) please help, thank you!

Answers

21 because you just multiply the 2 numbers.
21 feet 3x7 is 21 so ya

Money was placed in a savings account and earned 3/4 % interest paid annually. Samantha, Tony and Anuyia each wrote an equation to show the amount of money in the account after one year with a balance of M dollars. T represents the total amount of money in the account.

Samantha’s Equation: T = 1.075M

Tony’s Equation: T = M + 0.0075M

Anuyia’s Equation: T = M(1 + 0.0075M)

Since none of the equations were written the same, they decided to see if their equations would give the same answers by using a $75 balance. Solve this problem using each student’s equation. Show your work. You may use a calculator for this part of the assessment. Show your work to receive full credit.

Answers

Answer:

what do u do

Step-by-step explanation:

Answer:

Step-by-step explanation:

what is the value of q ?

Answers

71° is the answer. 44°+27°=71°
Answer:
71

Explanation:
44 + 27 = 71

I need help on this question

Answers

Answer:

its A and 4 good luck!!!!!!

Answer:

A. 13 + t = 17 Value of t: t = 4

Step-by-step explanation:

My steps:

1) rewrite: 13 + t = 17

2) subtract 13 on each side on equal sign:

13 -13 + t = 17 - 13

3) Solve: t = 4

I hope this helped, good luck!

The lengths of two sides of a right angled triangle are 20 cm and 30 cm.
Calculate the length of the third side, if it is:
(a) the hypotenuse
(b) not the hypotenuse

Answers

Answers:

Part (a)   10*sqrt(13) Part (b)   10*sqrt(5)

Those values are exact. They approximate to:

10*sqrt(13) = 36.0555

10*sqrt(5) = 22.3607

====================================================

Explanation:

Part (a)

If the unknown third side is the hypotenuse then we need to find the value of c when a = 20 and b = 30.

Apply the pythagorean theorem

a^2 + b^2 = c^2

20^2 + 30^2 = c^2

400 + 900 = c^2

1300 = c^2

c^2 = 1300

c = sqrt(1300)

c = sqrt(100*13)

c = sqrt(100)*sqrt(13)

c = 10*sqrt(13)  .... exact length

c = 36.0555 ...... approximate length

------------------------------------

Part (b)

If the third side is not the hypotenuse then that must mean c = 30 is the hypotenuse as this side is larger than the 20 cm side. The hypotenuse is always the longest side.

Let a = 20 be the known leg. Let's find the other unknown leg b using the pythagorean theorem.

a^2 + b^2 = c^2

20^2 + b^2 = 30^2

400 + b^2 = 900

b^2 = 900-400

b^2 = 500

b = sqrt(500)

b = sqrt(100*5)

b = sqrt(100)*sqrt(5)

b = 10*sqrt(5) ..... exact length

b = 22.3607 .......  approximate length

Help me please ngl this is why sometimes I hate ixl

Answers

Answer:

Do 134 ÷ 2 = 67

Step-by-step explanation:

Which expression can be used to find the radius of a circle with a diameter of 90 inches?


a. 90(2)

b. 90 + 2

c. 90 ÷ 2

d. 90 - 2

Answers

the answer to this is C, 90/2

Answer:

c=90/2

Step-by-step explanation:

the center of the circle is your starting point and if you draw a line straight down the middle then mark your starting point then the circle is cut in 2 then theres your answer

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