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NeX [460]
3 years ago
13

Solve the equation 1/2y - 21/4 = 35/4 for y. Identify the sequence of operations used to solve the equation.

Mathematics
2 answers:
DerKrebs [107]3 years ago
7 0

Answer:

y = 1/28

Step-by-step explanation:

Given the expression:

½y - 21/4 = 35/4

We'll have to Multiply through with the LCM which is (2y * 4 = 8y)

(8y) ½y - (8y) 21/4 = (8y) 35/4

4 - 2y * 21 = 2y * 35

4 - 42y = 70y

4 = 70y + 42y

4 = 112y

Divide through by 112 to make y the subject.

y = 4 / 112

y = 1 / 28

Hoochie [10]3 years ago
5 0

Answer: y = 28

Step-by-step explanation:

Add both sides by 21/4 to cancel out the 21/4 on the left side. 1/2y = 56/4

You can rewrite the fraction 56/4 as 28/2 by dividing the numerator and denominator by 2. 1/2y = 28/2

Multiply both sides by 2 and you get y = 28

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Answer:

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Step-by-step explanation:

Recall that the sine and cosine are completed functions.

This means that:  \sin(x)=\cos(90-x)

\sin(20\degree)=\cos(90-20)

\sin(20\degree)=\cos(70\degree)

Recall that: sine ratio is opposite/hypotenuse

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This implies that:

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Step-by-step explanation:

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2 years ago
Brandie lives on the twelfth floor of her apartment building. She walks down 2 flights to visit a friend, then up 3 flights to d
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Answer:

-1

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2 years ago
Katy's favorite rides at the amusement park are the roller coasters and water slide. The wait time for the roller coaster is 25
ioda

Answer:

She went on the slide 8 times and on the roller coaster 4 times

Step-by-step explanation:

We convert each statements to a mathematical equation.

Firstly, let's represent the number of times she went on the coaster with R and the number of times on the slide with S. We know quite well she went on 12 rides. Hence the summation of both number of times yield 12.

Mathematically, R + S = 12. ........(i)

Now we also know her total wait time was 3hours. Since an hour equals 60 minutes, her total wait time would equal 180 minutes.

To get a mathematical representation for the wait time, we multiply the number of roller coaster rides by 25 and that of the slides by 10.

Mathematically, 25R + 10S = 180 .......(ii)

Here we now have two equations that we can solve simultaneously.

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S = 8

S = 8 , and R = 12 - S = 12 - 8 = 4

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3 years ago
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