Answer:90%
Step-by-step explanation: we know this because the total about of questions on the test is 20 and for the score to add up to 100% each question has to be worth 5% so we can just do 5 x 18 to get 90%. or (5 x 2) - 100 to also get 90%
The equation is 20x = 1200
x=1200÷20
x=60 rows
X + 13 = -4
x = -4 - 13
x = - 17
I am thinking it is the first one..solution is -17
