Question

help pleaseeeeee!!!

Bobby is bringing his collection of dimes and quarters to the bank to deposit into his savings account. If d represents the number of dimes in Bobby’s collection, q represents the number of quarters, and the collection is worth $63.75, which of the following equations models the value of Bobby’s collection?
A.
63.75 = d + q
B.
63.75 = 25d + 10q
C.
63.75 = 10d + 25q
D.
63.75 = 0.10d + 0.25q

Answer 1

@ladiesman217

Answer 2

I think that its D. 0.10d+0.25q because the others are more than 63.75 in total.

Answer 3

@phi help

Answer 4

First, try to understand the main idea.

if you had 1 quarter how many dollars do you have ?

Answer 5

75cent

Answer 6

1 quarter is 25 cents

Answer 7

can you say how many dollars 1 quarter is ?

Answer 8

it will be a decimal

Answer 9

so thw answer would be B

Answer 10

1 quarter is $0.25

Answer 11

if you have 2 quarters, how many dollars do you have ?

Answer 12

oh so its D then

Answer 13

if you have 2 quarters, how many dollars do you have ?

Answer 14

0.50

Answer 15

how did you figure that out ?

Answer 16

lol i add it

Answer 17

0.25+0.25 = 0.50

if you have 3 quarters it would be
0.25+0.25 +0.25 = 0.75

notice that instead of adding the same number 3 times, we can MULTIPLY
3* 0.25= 0.75

how much is 4 quarters worth (using multiplying)

Answer 18

1.00 or 0.00390625

Answer 19

just 1.00
if you added: 0.25+0.25++0.25+0.25= 1.00
if you multiply
you get 4*0.25= 1.00

Answer 20

If you had 8 quarters you would have 8*0.25 = 2.00

if you had 10 quarters you would have 10*0.25= 2.50

Answer 21

63.75 = 0.10d + 0.25q

Answer 22

now the new idea: if you have q quarters (q is some number that we don't know)
how much is q quarters worth ?

Answer 23

0.25

Answer 24

I meant how much is q quarters worth

Answer 25

1.00

Answer 26

q might not be 4. You have to use the rule: multiply

Answer 27

You write down q times 0.25 (we can't simplify to a single number because we don't know what q is)

Answer 28

we follow the rule:
1 quarter = 1*0.25
2 quarters = 2*0.25
3 quarters = 3*0.25
q quarters = q*0.25

same idea with q as with 1, 2 or 3

Answer 29

okay

Answer 30

dimes are 10 cents which is 0.10 dollars

if you have d dimes (d is some number), they are worth d*0.10 dollars

if you have q quarters and d dimes, you have
0.10d + 0.25q dollars

Answer 31

thanks