A student missed 10 problems on a history test and received a grade of 17%. If all the problems were of equal value, how many pr oblems were on the test?
1 answer:
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
You might be interested in
Answer:
$1.33
Step-by-step explanation:
let the cost of apple be $x .
now according to question the two shoppers spend the same amount
4.75x+4=5.5x+3
0.75x=1
x= 4/3= $1.33
therefore, pound of apples cost = $1.33
To get the answer we can use proportion.
Answer:
the correct answer is 5√30
Step-by-step explanation:
√20= 2√5
√3=√3
√18= 3√2
2√5 x √3 x 3√2= 5√30
Answer:
9
Step-by-step explanation:
