Answer:
Z-score = 1.5
Step-by-step explanation:
Z-score = (x-mean)/standard deviation
= (90-75)/10
= 1.5
9n + 15 < = 10n + 24
9n - 10n < = 24 - 15
-n < = 9
n > = -9
Answer:
70
Step-by-step explanation:
2 + 10 = 12
84 ÷ 12 = 7
7 x 10 = 70
She graded 70 maths papers and 14 science papers.
Answer:
No
Step-by-step explanation:
To make a triangle the angles have to add up to 180 degrees so 90+45+35=170 degrees not 180.
