Answer:
5.71
Step-by-step explanation:
-1.52 + x = 4.19
Add 1.52 to both sides.
x = 5.71
Ok so we know that the student scored 86%, but missed 33 problems. That means those 33 problems were worth 14% of the total mark, as the would've scored 100% if they scored those as well.
This means that one percent is equivalent to

Which is about 2.357 questions.
Therefore all the questions (which is 100%) is

Which is 235.71 questions, rounded up to 236 questions.
So there were 236 problems in the test
Hope this helped
Answer:
Step-by-step explanation:
I = PTR/100
Given from the question:
I = $168
R = 7%
T = 8
P = ?
Substituting into the formula , we have
168 = P X 8 X 7 / 100
168 X 100 = 56P
16800 = 56P
Therefore
P = 16800/5
P = 300
Therefore the original amount in the account is $ 300
An inequality I believe so:
p should be larger than 7.0 but less than 7.8 for a normal pH balance.
Only one answer is between 7.0 and 7.8 therefore 7.3 is the answer.
Hope this helps!