B-I hole this helps like if I’m right
.8 (88%)+.2x=90%
70.4%+.2x=90%
subtract 70.4% from 90% to get 19.6%
make the .2x into 2 and the 19.6 into 196
divide 196 by 2 to come up with the answer of 98%.
you will need a 98% to have a 90% for the final grade
It might me x=7 check my answer have not did geometry recently
Step-by-step explanation:
Divide the percentage by 100. E.g 74%=64/100
Then simplify the newly made fraction,
Find the common factors,
E.g 64/100
Both can be divided by 2
32\50
Repeat simplifying step...
16\25
Till there are no more common factors
and that's the final answer...
<em>Hope you understand, if not leave a comment and I'm ready to help, please mark BRAINLIEST.</em>
Answer:
the length of b is 7.56 centimeters.
Step-by-step explanation: