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

.95

step-by-step explanation:

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!