Question 1
Solve.

4/7 = x+3/21

A) x=9
B) x=15
C) x= 33 3/4
D) x=91

-
Would it be A??
-
I really need to pass this test! (procrastinated the whole break and now in a big hurry to raise my grade).

Question

Question 1
Solve.

4/7 = x+3/21

A) x=9
B) x=15
C) x= 33 3/4
D) x=91

-
Would it be A??
-
I really need to pass this test! (procrastinated the whole break and now in a big hurry to raise my grade).

bohotness · Answer

n 4/7 = x+3/21 // - x+3/21

4/7-x-(3/21) = 0

4/7-x-1/7 = 0

3/7-x = 0 // - 3/7

-x = -3/7 // * -1

bohotness · Answer

4/7 = 21/x-3 
multiply each side by x-3 

(x-3) * 4/7 = 21 

distribute 
(4x-12)/7 =21 

4x - 12 = 147 
4x = 159 
x = 159/4 or 39.75 

another way, flip each fraction over 

7/4 = (x-3)/21 
147/4 = x-3 
147 / 4 = x - (12/4) 
159/4 = x

anonymous · Answer

So the answer would be C? Sorry i am so tired. You are a big help.

bohotness · Answer

i mean its okay

anonymous · Answer

Im confused because 39.75 isn't one of the options ?

bohotness · Answer

4/7 = 12/21
12/21 = x + 3/21

bohotness · Answer

sorry about the other post this one might make it easy for you to pick

anonymous · Answer

Okay and what about this one. I just really need to get a good score.

What is 24% of 75?

       A) 15
       B) 16.5
       C) 18
       D) 22.5

bohotness · Answer

which one do you think is the answer?

anonymous · Answer

D) 22.5 for #2 right???
And for #1 I'm going with B is that correct?

bohotness · Answer

1 is a and 2 try again

bohotness · Answer

you close on 2

anonymous · Answer

18 for 2?

bohotness · Answer

yes

bohotness · Answer

do you have any more questions?

anonymous · Answer

and #3 is 
36% of what number is 180?
Is the answer 500??

bohotness · Answer

no try again lower its not in the 100s

anonymous · Answer

But there are no lower options?? :/

 #4 :
David drove 168 miles on 7 gallons of gasoline. What equation can be used to find how far can he can travel on a full tank of 16 gallons? Would it be 7/168 = 16/x ?

bohotness · Answer

3 Let the number be: x :

36%ofx=180

Or :

36100×x=180

anonymous · Answer

500
       515
       540
       550

These are the only options for #3. Which would it be???

bohotness · Answer

what is the opion for 3?

anonymous · Answer

I went with 500.. but you said no?
So is it 515, 540, or 550?

anonymous · Answer

I divided 180 by 0.36 and got 500. ?

bohotness · Answer

3 the anwser is 64.8

bohotness · Answer

i mean on 3 your answer is 64.8

anonymous · Answer

Thats what i thought! but theres no option for that i don't know what to do lol

anonymous · Answer

Ok whatever ill just skip that one and we can move on to number 4?

anonymous · Answer

thanks so much for the help by the way :) !

bohotness · Answer

and 4 is b

bohotness · Answer

7/168=16/x

anonymous · Answer

Ok thanks but i didn't give options for #4?