MATHEMATICS MIDDLE SCHOOL

| If f(x) = (3x – 1, find f(2) and f(-2)

Answers

Answer 1
Answer:

Answer:

f(2)=5, f(-2)=-7

Step-by-step explanation:

Step 1 : f(2)=3(x)-1

            f(2)=5

Step 2 : f(-2)=3(x)-1

              f(-2)=-7

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Chelsea has 11 times as many art brushes as Monique. If they have 60 art brushes altogether, how many brushes does Chelsea have?

Answers

Let Monique's number of art brushes be m.
Then, since Chelsea has 11 times as many art brushes as Monique, Chelsea has 11m brushes.

Together they have 60 art brushes, so we write the equation:

                                              m+11m=60.

This means that 12m=60, dividing both sides of the equation by 12 we get m=5.

Chelsea has 11m=11*5=55 brushes.

Answer: 55

Help me solve this please 33+15w=3w-w+4w

Answers

Answer:

33+15w=3w-w+4w

33+15w - 15w=3w-w+4w -15w

33 = 2w + 4w -15w

33 = 6w -15w

33 = -9w

33/9 = -9/9w

3.66 = w

Step-by-step explanation:

33+15w=3w-w+4w

33+15w - 15w=3w-w+4w -15w

33 = 2w + 4w -15w

33 = 6w -15w

33 = -9w

33/9 = -9/9w

3.66 = w

If 2/3 = x/12, what is the value of x? A)4. B)8. C)18. D)24.

Answers

B because of what is shown above.

What is the best estimate for 211/ 71?? PLEASE SOMEONE HELP

Answers

The best estimate is 2.9718 .

Ethan ran 11 miles in two hours. What is the unit rate of miles to hour?

Answers

11/ 2= 5.5 miles per hour

Jem boy wants to make his 8-meter square pool into a rectangular one by increasing its length by 2m and decreasing its width by 2m .jem boy asked your expertise to help him decide on certain matters.a.What will be the new dimensions of jem boy's pool?
b.What will be the new are of Jem Boy's pool? What special product will be used?
c.If the sides of the square pool is unknown,how will you represent its area?
d. I fJem Boy does not want the area of his pool to decrease, will he pursue his plan? Explain your answer.

Answers

Side = 8m
He increases length by 2m and reduces width by 2m
(a.) New dimensions will be -
Length = 10m and Width = 6m
(b.) Area = length x breadth (or width)
 here we will use the special product (x+y) (x-y)
length = (x+y) and width = (x-y)
area = (8+2) x (8-2)
            8^(2) - 2^(2) 
            = 60
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