Not sure for (b)
Step-by-step explanation:
(a)55+80+x=180 (angles inside the triangle)
135+×=+180
x=180-135
x=45
Answer:
There is a total 50 questions.
Step-by-step explanation:
Let x = total questions in the exam
Since 82% of the test was scored correctly, that means 18% of the student's exam was scored incorrectly.
With this information we can write:
(Given that the student made 9 mistakes)
(divide 18% on both sides)

∴ There was a total of 50 questions in the examination.
The formula for yearly compound interest is A(1 + r)^t
Where is A = 1000, r = 8%, t = 20

The answer is $4660.96
Answer:28.8 ounces
Step-by-step explanation:20% -36 =22.8