Each day at school, Kai records his homework assignments in a small notebook. Each page of the notebook measures 2 1/4 inches by 3 1/2 inches. Find the area of one page.

Answers

Answer 1

Answer: Area,for rectangles is length x width so 2 1/4 inches x 3 1/2 inches is 7 7/8

Answer 2

Answer: the correct answer is 7/78

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Write expression for double the product of 7 and 7

Answers

The product means the answer to a multiplication problem, so the product of 7 and 7 means 7x7. Double 7x7 means...

2(7x7)

A cube has side length a. The side lengths are decreased to 40% of their original size. Write an expression in simplest form for the volume of the new cube in terms of a.

Answers

$V=a ^(3)$ originally. Then you reduces the side lengths a so it will be $V=( (2)/(5) a)^(3) = (8)/(125)a^(3)$
Just note that 40% is the same as 2/5.

Find the inverse of the function d(x) = 2x - 4

Answers

Answer:

d(x) = 1/2x + 2

Step-by-step explanation:

Swap x and y:

x = 2y - 4

Add 4 to the other side:

x + 4 = 2y

Divide by 2:

y = 1/2x +2

Answer:

see explanation

Step-by-step explanation:

let y = 2x - 4

Rearrange making x the subject, add 4 to both sides

2x = y + 4 ( divide both sides by 2 )

x = $(y+4)/(2)$

Change y back into terms of x, hence

$f^(-1)$ (x) = $(x+4)/(2)$

Parallelogram A B C D is shown. The length of A B is (9 x minus 14) inches and the length of D C is (3 x + 4) inches. In parallelogram ABCD, what is DC? (trust me) 13 in.