Anna calculated the area of parallelogram with a base of 72
5
m and a height of 2 m. Her work is shown here.

A = One-half b h = one-half (7 and two-fifths) (2) = one-half (StartFraction 35 Over 5 EndFraction) (StartFraction 2 Over 1 EndFraction) = StartFraction 70 Over 10 EndFraction = 7 meters squared

What errors did the student make? Select all that apply.
She used the incorrect area formula.
She substitute the values for the base and height incorrectly.
She converted the mixed number to an improper fraction incorrectly.
She multiplied incorrectly.
She simplified the fraction StartFraction 70 Over 10 EndFraction incorrectly.

She used the incorrect area formula.

She converted the mixed number to an improper fraction incorrectly.

She multiplied incorrectly.

Step-by-step explanation:

The area of a parallelogram is

A = bh not A = 1/2 bh

She started with the wrong formula

A = 7 2/5 * 2

Change to an improper fraction  

The improper fraction is 37/5  not 35/5

A = 37/5 *2

She multiplied incorrectly

A = 74/5

B) She converted the mixed number to an improper fraction incorrectly.

C) She multiplied incorrectly.

Step-by-step explanation:

A = base × height

= (7⅖)(2)

= (37/5)(2)

= 74/5

= 14.8 m²

the ratio of white tiles to blue tiles is 48: 16. the ratio in it's simplest form is 3: 1.

step-by-step explanation:

ratio: take the first number and add a colon next to it, then add the second number after that. make sure the ratio order matches up with the written problem!

simplest form: we can simplify the ratio 48 : 16 by dividing both terms by the greatest common factor (gcf).

the gcf of 48 and 16 is 16.

divide both terms by 16:

48 ÷ 16 = 3

16 ÷ 16 = 1

reducing to simplest form:

48 : 16 = 3 : 1