I need help with Part A and Part B and I need help on how to show work

A) A+ or 5+ (not sure about this)

B) Should be 112.5%

Step-by-step explanation:

So let's say 27 is the amount of points he got. The amount of points without extra credit should be 24 as said in the task. We take 27/24 * 100. That will give the percentage achieved.

As for A I'm not sure. I believe the grade should be the highest which should either be A or 5 (these amount to 100% of task completed) And since these are 100% grades then the 112.5% grade should be A+ or 5+ or whatever unit you are using

the guy explained it amazingly

Step-by-step explanation:

step-by-step :

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1