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.
0=1. The answer is No Solution.
Answer:
7(y-4)
---------
6(y+4)
Step-by-step explanation:
5y-20 7y+35
------------ * ------------
3y+15 10y +40
Factor
5(y-4) 7(y+5)
-------- * -----------
3(y+5) 10(y+4)
Cancel like terms
(y-4) 7
-------- * -----------
3 2(y+4)
7(y-4)
---------
6(y+4)
Ok so for area you multiply the length by the width and for perimeter you just add them.. hope this helps!!
Answer:
27
Step-by-step explanation:
Divide the denominators first. 57/19 = 3
That means to get the denominator you had to multiply 3 to 19. What you do to the bottom must be done at the top.
9*3 = ?
27
