Answer:
80-5x
Step-by-step explanation:
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.
Answer:
ive seen this before its not to teach what you think stay away from it
Answer:
C
Step-by-step explanation:
.........................
Answer:
7, 7.1, √51, 7.2
Step-by-step explanation:
√51 is 7.14
