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

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

Mathematics
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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
36/64

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divide? ?
yes.
0.5625
36/64=9/16 B is the answer.
ok thx can u help me with a couple of more
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
20/12=5/3
@amirreza1870 is on the right track so far :)
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
1200/80=120/8=15 c is correct.
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 ?!
1.2/18=x/27 x=(27*1.2)/18 x=1.8 D is true
Which value is equivalent to 15.2 %written as a decimal? A. 0.0152 B. 0.152 C.15.2 D.1520.0
15.2/100=0.152 B is true
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
hmm... let's try reducing 68/100
68 divided by 4 --------------- 100 divided by 4
should give us 17/25
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
I was thinking c cause 15% is $3 I believe
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 :)
75% of a number is 120. What is 40% of the number? A.36 B.64 C.138 D.225
:/ I'm stuck . It's been forever since I had that question
lol so u don't know it?
no sorry
this problem doesn't appear ever again in higher level math. It's all proofs.
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
so ur not gong to help me now ?!
@LynFran can u help me maybe with a few more?
can u do this one ? ^
by proportion the number of books he signed for = 14 / 0.35
(35% = 0.35)
just gran your calculator and work out 14 divided by 0.35
* grab!
could u help me with ths one up top bout the books and before that.......@LynFran
-_-. I actually got the previous question.. must be my sleep depriving mode
lol it happens
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
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
40 books
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
ok theres 6 more QS..do u mind helping
I could try... I haven't been sleeping well in weeks.
@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
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
36 is incorrect let me explain
told you it's sleep issues and I haven't done these in ages. >_<
so when I was rechecking, I had this odd number that didn't fit, so there must be another method.
\[\frac{ 75 }{ 100}*160=120\] so we use 160 and find 40% of it \[\frac{ 40 }{ 100 }*160=64\]
where did you get 160?
oh x.x misread the question 75% of a number is 120. 0.75 x n = 120
then divide 0.75 for 160
\[\frac{ 100 }{ 75 }*120=160\]
then 160 x 0.40 = 64
accidentally overlooked the "a number" part. x(
The orginial price of a watch is $109. It was on sale for $100.28.what was the discount rate...this has no answers
try... original price - sale price to figure out the difference
I found the discount rate, but what I did... well I don't recommend it.. it's trial and error.
@UsukiDoll method is correct what answer u get? @Ddaddysgirl13
really?
I used logic a bit to get my rate XD
what is the answer?
the original price is 109 and the sale price is 100.28 what is 109-100.28 ?
then we can figure out whether or not our discount rate is big or small.
@Ddaddysgirl13 do u understand?
*should be big or small. omg I'm messing up at typing XD
ok since you inbox me saying yes do u have any more problems to work here?
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
ok my bad sorry
what is 7/100*139
first we have to have 7% in decimal form 7/100 = 0.07 then multiply 0.07 by 139
9.73
yes!
almost $10 in tax.. D: That's a plate lunch
so 4 more questions now?
the 9.73 would be the amount of tax on the desk ok
hey its izabellla ummm my password I kinda forgot it oops

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