Question

Does any knows how to do this

Answer 1

d + q = 40
0.10d + 0.25q = 7.75

Answer 2

Let the no of quarters be x

THEN , the no of dimes WILL BE 38-x

0.25x + 0.10 ( 38-x) = 6.95

0.25x + 3.80 - 0.10x = 6.95

0.15x = 3.15

x = 21

ANSWER 21 quarters +17 dimes

i got flvs too -,- its annoying

Answer 3

lol
and that was incorrect

Answer 4

This problem is a system of two equations. You know two facts:
1.) There is a combination of dimes and quarters which totals 38 coins
2.) The combination of these coins results in $6.95

Putting both of these facts into equation form results in
1.) D + Q = 38
2.) D($0.10) + Q($0.25) = ($6.95)

To solve this, we'll be using the method of substitution. Equation 1.) is equivalent to D = 38 - Q. We'll substitute this value into equation 2.)

2.) (38-Q)($0.10) + Q($0.25) = ($6.95)
Expanding this becomes:
38($0.10) - Q($0.10) + Q($0.25) = ($6.95)
($3.80) - Q($0.10) + Q($0.25) = ($6.95)
- Q($0.10) + Q($0.25) = ($3.15)
Grouping like terms:
Q(-$0.10 + $0.25) = ($3.15)
Q($0.15) = ($3.15)
Q = ($3.15)/($0.15)
Q = 21

After we've solved for Q, we can substitute this value back into 1.) to get D
D = 38 - Q
D = 38 - 21
D = 17

Jenna has 17 dimes.
how could it be incorrect o.O

Answer 5

because it's different numbers
read carefully
and giving answers is not allowed on this site btw

Answer 6

ive gotten answers all the time -,- so if you want to mark it as abuse please do so -,-

Answer 7

d + q = 40
0.10d + 0.25q = 7.75

d = 40 - q

0.10(40-q) + 0.25q = 7.75 solve for q

Answer 8

is this a test that ur working on or something?

Answer 9

No a practice application
it just says mystery test but i can do it over and over again but i just seems to get the working wrong

Answer 10

oh okay then

P = 2w + 2L

L = 1 + W

so P = 2w + 2(1+w)
P = 14

14 = 2w + 2(1+w) solve for w

Answer 11

so if i get \[14=2w+2+2w\]

Answer 12

am confused here on this part do i add all

Answer 13

you can add 2w + 2w = 4w
so you get 14 = 4w + 2 then subtract 2 from both sides
-2 -2
4w = 12 divide both sides by 4

Answer 14

3

Answer 15

correct :)

Answer 16

where did you find 2w

Answer 17

perimeter formula = 2(width) + 2(length)

length = 1 + width

perimeter = 2(width) + 2(1+width)

Answer 18

x + y = 275
x = 55 + y

Answer 19

i dnt understand

Answer 20

that's the system of equations that you can solve for x from

y = x - 55

x + x - 55 = 275 solve for x

Answer 21

still don't get it

Answer 22

am sorry

Answer 23

x + x - 55 = 275 solve for x
add like terms x + x = 2x
2x - 55 = 275 add 55 to both sides
+55 +55

Answer 24

answer is 165

Answer 25

that's what I got

Answer 26

ok hope its right

Answer 27

its right

Answer 28

^
you're welcome

Answer 29

i have two more are u wwilling to help me please

Answer 30

sure
btw there's a pretty blue button to the right that says "Best Response"
*cough*

Answer 31

lol i was gonna press that

Answer 32

t + r = 10
3.75t + 3.50r = 36.25

Answer 33

ok dnt know where am suppose to start i see letters

Answer 34

lol xD
try to solve for t

r = 10 - t

3.75t + 3.50(10-t) = 36.25 solve for t

Answer 35

am sorry but how do i subtract = t

Answer 36

like you would subtract any number...
3.75t - 3.5t = 0.25t

Answer 37

after i subtract do i divide

Answer 38

get the 35 to the other side
then divide

Answer 39

i didnt get 35

Answer 40

how'd you got that

Answer 41

do i divide 0.25 by 35

Answer 42

sorry I gtg
3.75t + 3.50(10-t) = 36.25
3.75 + 35 - 3.5t = 36.25
0.25t = 1.25 divide both sides by 0.25

Answer 43

ok
thank you

Answer 44

it's 5