Let's start by seeing what percentage is incorrect.
100-85=15
So, 15% is incorrect when answering 3 problems wrong. So let's divide 15 by 3.
15÷3=5
So, each problem is worth 5%, let's divide 100 by 5. The reason I'm doing thiis is to find how many questions are on the quiz, since if you got them all right, it's 100.
100÷5
20
There are 20 questions, let's make sure this is correct.
If she got 3 wrong, she got 17 right. Let's calculate her percentage and make sure it is the right one.
17÷20
.85×100
85%
So, there are 20 questions on the math quiz.
54^2=54x54
=(50+4)(50+4)
=50^2 + 2x50x4 + 4^2
=2500 + 400 + 16
=2916
Please Mark as brainliest
Answer:a
a
Step-by-step explanation:
i took the test
I would say the answer is d
Sorry if I’m wrong
2.5
,
21
8
,
3
√
25
,
π
,
√
19
2.5
,
21
8
,
25
3
,
π
,
19
