2 Hours Until Class. Please Help Me Complete These Equations?

Question

I hit these two like a brick wall. I have never seen these before. I am so screwed! Please explain!

EXPRESS THE RESULT AS A MIXED NUMBER

3 3/4 + 1/5

__________

5/8

^^ I can't write the question exactly as it looks on paper because this software wont let me. But basically those two mixed numbers with a line under it and the 5/8's in the centre.

QUESTION 2

DETERMINE THE MISSING VALUE ROUNDED PROPERLY TO TWO DECIMAL PLACES:

x/22 = 20/4

?? I AM SCREWED !!

Answer 1

15/4+1/5

------------

5/8

150/40+8/40

------------------

25/40

158/40

---------

25/40

158   40

-----  ------

40     25

6320

------

1000

6 32/100

6 8/25

158/25

x     20

----   ----

22    4

4x=440

------------

4     4

x=110

Answer 2

Answer #1) 6 8/25 ( I did the calculation on paper)

Answer #2)

x/22 = 20/4

x/22=5

x=5*22

x= 110

To write in two decimal places the answer should be written as

x= 110.00

Answer 3

HA HA HA HA HA HA!!  You are gonna flunk.  You are gonna flunk.  Try studying instead of mooching.

Answer 4

Start by simplifying the top

3 3/4 is 15/4 so you have 15/4 + 1/5

To add the fractions, you need to have the denominators (bottoms) the same.  Both 4 and 5 divide evenly into 20, so a common denominator is 20.  Multiply the top and bottom of the first fraction by 5

75/20 + 1/5

Multiply the top and bottom of the second fraction by 4

75/20+4/20

Add them together

79/20

Now, you're dividing by 5/8 To divide fractions, just multiply by the reciprocal

79/20 divided by 5/8 = 79/20 * 8/5

To multiply fractions, just multiply the tops and multiply the bottoms

632/100

That's 6 and 32/100, you need to get 32/100 into lowest form.  Divide top and bottom of the fraction by 4

6 8/25

2.

Here, you will cross-multiply and solve. To cross-multiply, take the top left times the bottom right and make it equal to the top right times the bottom left.

x/22=20/4 becomes

x*4=20*22

4x=440

x=110

_/

Answer 5

For the first one simplify the top first so you would have:

3  19/20

-------------

5/8

Then make the top an improper fraction so u can divide:

79/20

---------

5/8

Then divide and make sure to flip the bottom so u can multiply

79/20 *  8/5

Do cross cancellation and your answer in improper fraction is 158/20

Mixed number:  6  8/25

Second Problem you want to Cross Multiply first so you get:

4x=440

Divide both sides by 4:

x=110

I hope this helped.

Answer 6

3 3/4 + 1/5 = 15/4 + 1/5 = 75/20 + 4/20 = 79/20

(79/20) / (5/8) = [(79) * (8)] / [(20) * (5)] = 632/100 = 158/25

158/25 = 6 8/25

Answer: 6 8/25

x/22 = 20/4

x = 22 · 5

x = 110.00

Answer: 110.00

Answer 7

[3 3/4 + 1/5]/[5/8]

= [3 15/20 + 4/20]/[5/8]

= [(75+4)/20](8/5)

= 158/25

x/22 = 20/4

x = 22(20/4) = 110