Algebra Test Help

[Unfortunate 10+ year member]

i'm taking this test right now but i'm too lazy to figure out the word problems so if any of you geniuses are bored throw me some answers.

DONE. mrs. boyd has a desk full of quarters and nickels. if she has a total of 25 coins with a total face value of $4.45, how many of the coins are nickels.

a) 9 nickels

b) 16 "

c) 11 "

d) 21 "

helen weller invested $15,000 in an account that pays 10% simple interest. how much additional money must be invested in an account that pays 13% simple interest so that the total interest is equal to the interest on the two investments at the rate of 11%?

a. $11,000

b. $15,000

c. $7,500

d. $12,000

Tim and judy mix two kinds of feed for pedigreed dogs. they wish to make 21 pounds of feed worth $0.42 per pound by mixing one kind worth $0.28 per pound with another worth $0.78 per pound. how many pounds of the cheaper kind should they use in the mix? round to the nearest whole pound if necessary.

a. 6pounds

b. 11 "

c. 15 "

d. 17 "

 

a contractor mixtes concrete from bags of premix for small jobs. how many bags with 4% cement should he mix with 14 bags of 14% cenment ot produce a mix containing 11% cement?

 

a. 25 bags

b. 6 bags

c. 8 bags

d. 20 bags

how man yliteres of a 20% alcohol solution must be mixed with 90 liters of a 50% solution to get a 40$ solution??

a. 4.5 liters

b. 135 liters

c. 45 liters

d. 13.5 liters

 

lisa biked at 10mph for a time but got a flat tire. she then walked at 2mph. she traveled a total of 28miles. had she biked the whole time, she would have gone 60miles. how man hours did she walk?

a. 5hr

b. 3 hr

c. 2 hr

d. 4 hr

marty leaves the airport in his private plane and flies due east at 186mph. Two hours later, a jet leaves the same airport and flies due east at 434 mph. When wil the jet ovetake marty's plane?

a. 1.5 hours after the jet leave sthe airport

b. 0.43 hours after the jet leaves the airport

c. 3.5 hours after the "

d. 2.33 "

THNXXXX

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[99grandprixGT 5,000+ posts]

9 nickels 16 quarters

 

[BrandonB 10+ year member]

9 nickels seconded

9 nickels=45 cents, leaves $4.00, which is evenly divided by 25

 

[Tone415 10+ year member]

i'm taking this test right now but i'm too lazy to figure out the word problems so if any of you geniuses are bored throw me some answers.
mrs. boyd has a desk full of quarters and nickels. if she has a total of 25 coins with a total face value of $4.45, how many of the coins are nickels.

a) 9 nickels

b) 16 "

c) 11 "

d) 21 "

helen weller invested $15,000 in an account that pays 10% simple interest. how much additional money must be invested in an account that pays 13% simple interest so that the total interest is equal to the interest on the two investments at the rate of 11%?

a. $11,000 b. $15,000 c. $7,500 d. $12,000

Ur 21 and u were too lazy to do that?

 

[Unfortunate 10+ year member]

Ur 21 and u were too lazy to do that?

i mean i worked out the whole test and these are the last 6 questions. plus they're word problems i hate working them out.

good looking out on the answers for those who gave some!

 

[Unfortunate 10+ year member]

one more question added to OP

 

[Unfortunate 10+ year member]

bump

 

[schrummy 10+ year member]

for the one about dog food....how much profit are they looking to get?

 

[Unfortunate 10+ year member]

for the one about dog food....how much profit are they looking to get?

not sure, all the info i got is what i type up there.

 

[Supergumby5000 5,000+ posts]

not sure, all the info i got is what i type up there.

you typed it wrong, i bet its 0.78, not 0.078

 

[Unfortunate 10+ year member]

you typed it wrong, i bet its 0.78, not 0.078

shit, you're right i meant to type $0.78

 

[treadburner 10+ year member]

dog food = 15

 

[treadburner 10+ year member]

concrete= 6

 

[Matt2105 10+ year member]

i'm taking this test right now but i'm too lazy to figure out the word problems so if any of you geniuses are bored throw me some answers.

lisa biked at 10mph for a time but got a flat tire. she then walked at 2mph. she traveled a total of 28miles. had she biked the whole time, she would have gone 60miles. how man hours did she walk?

a. 5hr

b. 3 hr

c. 2 hr

d. 4 hr

THNXXXX

D.

She walked 4 hours which is 8 miles. That leaves 2 hours of biking@10 mph for 20 miles.

Had she biked the whole time it would have been 60 miles. 60 miles divided by 10 mph = 6 hours.

D.

 

[treadburner 10+ year member]

45 liters of alcohol solution