Can someone help me with a couple of questions? (math)

- anonymous

Can someone help me with a couple of questions? (math)

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- anonymous

@nignog9000

- anonymous

heres the first one
Marlin s marble jar had 36 red marbles and 64 blue marbles . what was the ratio of red marbles to blue marbles in the jar?
A. 1 : 2 B. 9 :16 C. 2:3 D.3:4

- anonymous

36/64

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## More answers

- anonymous

divide? ?

- anonymous

yes.

- anonymous

0.5625

- anonymous

36/64=9/16
B is the answer.

- anonymous

ok thx can u help me with a couple of more

- anonymous

A truck rental company had 32 vehicles on its lot. The company had 20 pickup trucks and the rest were cargo vans.
What was the ratio of pickup trucks to cargo vans on the lot
A. 3 to 5 B.5 to 8 C.5 to 3 D.8 to 3

- anonymous

20/12=5/3

- UsukiDoll

@amirreza1870 is on the right track so far :)

- anonymous

Which ratio correctly compares 120 cm to 80 mm
A. 3 to 20 B.3 to 2 C.15 to 1 D.150 to 1

- anonymous

1200/80=120/8=15
c is correct.

- anonymous

Wendy paid $1.20 to make 18 copies at the store. At this rate how much would she pay for 27 copies? A. $1.29 B.$1.47 C.$1.50 D. $1.80 -I was thinking B or C ?!

- anonymous

1.2/18=x/27
x=(27*1.2)/18
x=1.8
D is true

- anonymous

Which value is equivalent to 15.2 %written as a decimal?
A. 0.0152 B. 0.152 C.15.2 D.1520.0

- anonymous

15.2/100=0.152
B is true

- anonymous

Which fraction is equivalent to 68%?
A.17/50 B.17/25 C. 34/25 D.680/100 -sorry theres a little bit more of QS

- UsukiDoll

hmm... let's try reducing 68/100

- UsukiDoll

68 divided by 4
---------------
100 divided by 4

- UsukiDoll

should give us 17/25

- anonymous

The cab ride from the airport was $20.00. Lee ann's father tipped the cab driver 15%.
What was the total costs of the cab ride?
A.$3.00 B.$20.15 C.$23.00 D$35.00

- anonymous

I was thinking c cause 15% is $3 I believe

- UsukiDoll

let's convert the percentage into decimal
15/100 = 0.15
0.15 x 20.00 = 3
$20.00+3 =23
yes it is C. You are good at this :)

- anonymous

75% of a number is 120. What is 40% of the number?
A.36
B.64
C.138
D.225

- UsukiDoll

:/ I'm stuck . It's been forever since I had that question

- anonymous

lol so u don't know it?

- UsukiDoll

no sorry

- UsukiDoll

this problem doesn't appear ever again in higher level math. It's all proofs.

- anonymous

Bentio read 14 books in 3 months, which was 35% of the number of books he had signed up for during school year
How many books did benitio sign up to read ?
A.40
B.42
C.56
D.105
-ok

- anonymous

so ur not gong to help me now ?!

- anonymous

@LynFran can u help me maybe with a few more?

- anonymous

can u do this one ? ^

- anonymous

@NICK702222

- welshfella

by proportion the number of books he signed for = 14 / 0.35

- welshfella

(35% = 0.35)

- welshfella

just gran your calculator and work out 14 divided by 0.35

- welshfella

* grab!

- anonymous

could u help me with ths one up top bout the books and before that.......@LynFran

- UsukiDoll

-_-. I actually got the previous question.. must be my sleep depriving mode

- anonymous

lol it happens

- UsukiDoll

75% of a number is 120. What is 40% of the number?
A.36
B.64
C.138
D.225
we are told that 75% of a number is 120. So we have to figure that part out first

- UsukiDoll

0.75 x 120 = 90
so now we have 90 we need 40% of 90
converting from percent to decimal
40/100 = 0.40
0.40 x 90 = 36

- anonymous

40 books

- UsukiDoll

as for
Bentio read 14 books in 3 months, which was 35% of the number of books he had signed up for during school year
How many books did benitio sign up to read ?
A.40
B.42
C.56
D.105
someone already gave out a clue which was 14/0.35
that's 40

- anonymous

ok theres 6 more QS..do u mind helping

- UsukiDoll

I could try... I haven't been sleeping well in weeks.

- welshfella

@NICK702222 - please dont just give the answer to the question. Guide the questioner to the answer - read Code of Conduct. The poster learns nothing if you just give the answer

- LynFran

for this question what was ur answer 75% of a number is 120. What is 40% of the number?
A.36
B.64
C.138
D.225

- LynFran

@Ddaddysgirl13

- LynFran

36 is incorrect let me explain

- UsukiDoll

told you it's sleep issues and I haven't done these in ages. >_<

- UsukiDoll

so when I was rechecking, I had this odd number that didn't fit, so there must be another method.

- LynFran

\[\frac{ 75 }{ 100}*160=120\] so we use 160 and find 40% of it \[\frac{ 40 }{ 100 }*160=64\]

- UsukiDoll

where did you get 160?

- UsukiDoll

oh x.x misread the question
75% of a number is 120.
0.75 x n = 120

- UsukiDoll

then divide 0.75 for 160

- LynFran

\[\frac{ 100 }{ 75 }*120=160\]

- UsukiDoll

then 160 x 0.40 = 64

- UsukiDoll

accidentally overlooked the "a number" part. x(

- anonymous

The orginial price of a watch is $109. It was on sale for $100.28.what was the discount rate...this has no answers

- UsukiDoll

try...
original price - sale price
to figure out the difference

- UsukiDoll

I found the discount rate, but what I did... well I don't recommend it.. it's trial and error.

- LynFran

@UsukiDoll method is correct what answer u get? @Ddaddysgirl13

- UsukiDoll

really?

- UsukiDoll

I used logic a bit to get my rate XD

- anonymous

what is the answer?

- UsukiDoll

the original price is 109 and the sale price is 100.28
what is 109-100.28 ?

- UsukiDoll

then we can figure out whether or not our discount rate is big or small.

- LynFran

@Ddaddysgirl13 do u understand?

- UsukiDoll

*should be big or small. omg I'm messing up at typing XD

- LynFran

ok since you inbox me saying yes do u have any more problems to work here?

- anonymous

A desks costs $139.00. if the sales tax is 7%,how much tax would be on this desk
- cause i inboxed doesn't mean you have to be like that, my computer acts stupid cause when i type it wont let me again after i post stuff its easier to message sometimes

- LynFran

ok my bad sorry

- LynFran

what is 7/100*139

- UsukiDoll

first we have to have 7% in decimal form
7/100 = 0.07
then multiply 0.07 by 139

- anonymous

9.73

- UsukiDoll

yes!

- UsukiDoll

almost $10 in tax.. D: That's a plate lunch

- UsukiDoll

so 4 more questions now?

- LynFran

the 9.73 would be the amount of tax on the desk ok

- anonymous

hey its izabellla ummm my password I kinda forgot it oops

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