MATHEMATICS MIDDLE SCHOOL

1) Find the value of two numbers if their sum is 12 and their difference is 4.

Answers

Answer 1
Answer:

Numbers are 4 and 8

Step-by-step explanation:

Step 1:

Let the numbers be x and y. Given that their sum is 12 and difference is 4. Form equations for this data.

⇒ x + y = 12 ------ (1)

⇒ x - y = 4 -------- (2)

Subtract eq (2) from (1)

⇒ 2x = 8

⇒ x = 4

Step 2:

Find y.

⇒ y = 12 - x = 12 - 4 = 8


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MIDDLE SCHOOL

Solve the equation below
3x—5(x+2)=-40

Answers

Answer:

x = 15

Step-by-step explanation:

Step 1:  Distribute

3x - 5(x) - 5(2) = -40

3x - 5x - 10 = -40

Step 2:  Combine like terms

-2x - 10 = -40

Step 3:  Add 10 to both sides

-2x - 10 + 10 = -40 + 10

Step 4:  Divide both side by -2

-2x / -2 = -30 / -2

x = 15

MIDDLE SCHOOL

If sales tax on a 16.00 DVD is $1.32 find the sales tax on a $120.00 DVD player

Answers

 tax = $1.32 / $16.00 = 0.0825 = 8.25 % 

tax ofr $120.00 DVD = 0.0825 x $120.00 = $9.90
We know that,

A $16.00 DVD player has a sales tax of $1.32, 

And $120.00 divided by $16.00 = $7.50.

Since $1.32 is the sales tax on a $16.00 DVD,

We multiply $1.32 by $7.50, which is $9.90.

So, the sales tax on a $120.00 DVD player is $9.90
HIGH SCHOOL

Petra is asked to color 6/6 of her grid. she must use 3 colors; blue read and pink. there must be more blue sections than red sections or pink sections. what are the different way petra can color the sections of her grid and follow the rules

Answers

2 blues, 2 reads, 2 pinks
2blue, 1 red, 2 pink
2 red, 1 blue, 2 pink
2 blue, 1 pink, 2 red
hope this helps :D
HIGH SCHOOL

If N = 34, what is 7 - N?

Answers

7 - N       (replace N with 34)

7 - 34

- 27


The answer is - 27
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