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Arturiano [62]
4 years ago
6

What is the value of y?

Mathematics
1 answer:
mel-nik [20]4 years ago
4 0
I hope this helps! The answer is 9. I solved this by using “sin” to find y.

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deanna gets 3 problema incorrect on her math quiz. her score is 85%. how many questions are on the quiz
never [62]
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.
8 0
4 years ago
Read 2 more answers
I really need hep with this question <br> (5x-7)-5(7x-12)+7=0
tatyana61 [14]

Answer:

x = 2

Step-by-step explanation:

<h2>Simplifying expressions:</h2>

                5x - 7 - 5(7x - 12) + 7 = 0

Distribute (-5) to each term of (7x - 12)

   5x - 7 + 7x*(-5) + (-12)*(-5) + 7 = 0

                5x - 7 - 35x + 60 + 7 = 0

                 5x - 35x - 7 + 60 +7 = 0

Combine like terms.

                                 -30x + 60 = 0

Subtract 60 from both sides

                                        -30x   = -60

Divide both sides by (-30)

                                             x   = (-60)/(-30)

                                               x = 2

8 0
2 years ago
Read 2 more answers
Which expression is equivalent to One-fifth (150 x minus 80 y + 50 minus 50 x minus 25 y + 20)?
inna [77]

Answer:

The answer to your question is  20x + 21y + 14        

Step-by-step explanation:

Data

Expression             1/5 (150x - 80y + 50 - 50x - 25y + 20)

Process

1.- Multiply 1/5 by each term

                                     150/5x - 80/5y + 50/5 - 50/5x - 25/5y + 20/5

2.- Simplify

                                      30x - 16y + 10 - 10x - 5y + 4

3.- Simplify like terms

                                      (30x - 10x) + (-16y - 5y) + (10 + 4)

4.- Result

                                        20x + 21y + 14                                        

3 0
4 years ago
Read 2 more answers
At the bookstore, 40 copies of a popular paperback book fit perfectly on a 5-foot shelf. How many copies of this book would fit
Ierofanga [76]

Answer:

64 books

Step-by-step explanation:

The first step is to find the number of books that will fit in the shelve per foot

= 40/5

= 8

Therefore the number of books that will fit perfectly in 8-foot shelf can be calculated as follows

= 8×8

= 64

Hence 64 books would fit in 8-foot shelf

5 0
3 years ago
The cost of milk is given by the function c=0.25w+0.40. what is the cost of 20 milks
Citrus2011 [14]

Answer:

5.40

Step-by-step explanation:

Assuming w is the cost of one milk, let w =20

c = .25 (20) +.40

c = 5+.4

c =5.4

5 0
3 years ago
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