Can Someone answer this pleaseee Matthew has a jar of 368 nickels and dimes he has been collecting. The total value of the coins is $28.40.Which system of linear equations and solution can be used to represent the number of nickels and dimes Matthew has in his collection?

A. n + d = 368 0.05n + 0.1d=28.4 168 nickels and 200 dimes
B. n + d = 368 0.01n + 0.05d=28.4 200 nickels and 168 dimes
C. n + d = 368 0.05n + 0.1d=28.4 200 nickels and 168 dimes
D. n + d = 368 0.1n + 0.05d=28.4 168 nickels and 200 dimes

from the given, you already have the number of nickels which is 368 so the missing is how many dimes are in the jar that has $28.40...

so what I will do here, if it was me,

(368 x .05) + (?? x .10) = $28.40

being said...

.05 is the value of a nickel

.10 is the value of a dime

368 x .05 is $18.40

thats how much is the nickels cost

then subtract it to the total money Matthew have

$28.40 - $18.40 = $10

meaning there is $10 amount of dimes in the jar...

$10 / .10 = 100

so yea...

there is 368 nickels and 100 dimes combined in Matthew's jar to total of $28.40

Step-by-step explanation:

i hope this helps

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

answer: what is the question you're trying to ask?

step-by-step explanation: