Mark is solving the following system. X+y+Z= 2(1)

3x+2y+z=8 (2)

4x-y-Tz= 16 (3)

Step 1: He multiplies equation (1) by 7 and adds it to equation (3). Step 2: He multiplies equation (3) by 2 and adds it to equation (2)

Which statement explains Mark's mistake?

the answer is c

Step-by-step explanation:

i just finished the quiz

20%

step-by-step explanation:

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%