Answer:
12 problems
Step-by-step explanation:
All problems were of equal value
Let x be the number of problems in the test
We apply a rule of three
x ------------------------------- 100%
(x-10) --------------------------- 17%
(x-10)*100%/(x) = 17%
(x-10)/(x) = 0.17
(x-10) = 0.17*x
0.83*x = 10
x = 12.05
x = 12 problems
It would b B (12.56)
11.65
3x+99x=102x
1188/102=11.65
-10
50 ÷ (-5)
First ignore the brackets and the negative sign.
Then divide 50 by 5 to get 10
Then return the negative sign so the answer is; -10