MATHEMATICS MIDDLE SCHOOL

Find the percent of change. Round to nearest tenth, if necessary.62 is decreased to 52.

28 is increased to 96.

72 is decreased to 45.

55 is increased to 90.

230 is increased to 250.

180 is decreased to 140.

Answers

Answer 1
Answer: #1:
19.2%
#2:
242.9%
#3:
60%
#4:
63.6%
#5:
8.7%
#6:
28.6%
To find percent change you subtract the lower number by the higher number.
N decreased by 10
you do N minus 10.
Lets say the difference is Y.
So Y is what percent of N = Your answer

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Your mother gave you $13.32 with which to buy a present. This covered 3/5 of the cost. How much did the present cost? 8TH GRADE ONE STEP EQUATION. NEED HELP ASAP

Answers

3/5x = 13.32
x = 22.2

Answer: $22.20
13.32=3/5x
13.32/3=4.44
4.44*5=22.2
22.20$
The present costs 22.20$

your model train has one engine and eight train cars. find the total number of ways you can arrange the train. (the engine must be first.

Answers

Answer:

40,320

Step-by-step explanation:

We are given that there are 8 train cars and 1 engine.

We will fix the first place for the engine.

So, we are left with 8 options for the next place.

Now, if we fix the second place for any one of the train cars.

We will be left with 7 options for the next place.

Going on this way until there is no place left for the train cars, we get the relation,

Total number of ways to arrange the train = 1 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

i.e. Total number of ways to arrange the train = 1 × 8! = 8! = 40,320

Hence, the total number of ways to arrange the train is 40,320.
This is called a permutation. You would solve this in the following way: 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1. This could also be written as 8!. The answer would be 40,320. Hope this helps.

There are 50 questions to answer in a trivia contest. Each player starts with 100 points. He or she earns 10 points for each correct answer but loses 4 points with each incorrect answer. Each player must answer all 50 questions. What is the fewest number of questions a contestant must answer to get a score over 350?I just need to know how to set it up?

Answers

Answer:

Step-by-step explanation:

the fewest number you would have to answer to get 350 would be 25.

to get the fewest number you would not be able to miss any before reaching 350 points. since you are aiming for a minimum of 350 points and you start out with 100 you would divide 250 by 10 to get 25
25 questions , because they start with 100. 350-100=250 .. 250/10=25

Tomar found 14 web sites that have photos of mars. Jay found 6 of those sitesand 5 others that tamar did not find. How many different web sites did they find in all?

Answers

Answer:

27 websites

Step-by-step explanation:

Tomar found 14. Jay found 6 of the 14. Subtract 6 from 14 and you get 8. Add the 5 to the 8. You'll get 13. Now add 14 and 13 together. The total is 27. Tomar and Jay found 27 websites in all.

What properties are shared by rectangles

Answers

--  opposite pairs of sides are equal
--  opposite pairs of sides are parallel
--  interior angles are right angles
--  sum of the interior angles is 360°
--  opposite angles are supplementary
--  adjacent angles are supplementary
--  all of them have at least 2 lines of symmetry (some have 4)
right angles and 2 different sets of the same side 
lengths 

Evaluate the following expression. 7 × 22 + (8 - 2) ÷ 3

Answers

Answer:

156

Step-by-step explanation:

Using PEMDAS: We do the paranthese first:

7 * 22 + (8-2) / 3.

7 * 22 + 6 / 3.

Multiply / Divide:

154 + 6 / 3

154 + 2

156

You multiply 7 and 22 than add (8-2) than divide 3 than you will get 156
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