Answer:
0.1d + 0.25q = 320
d + q + 4 = 2d ⇒ q + 4 = d (we can replace d in the above equation)
0.1(q + 4) + 0.25q = 320
0.1q + 0.4 + 0.25q = 320
0.35q = 319.6
q = 319.6 / 0.35 = 913.14 ≈ 913
0.25 x 913 = $228.25
0.10 x 917 = $91.70
total $319.95
there is not answer that will result in exactly $320
if Kelly has 914 quarters and 918 dimes = (914 x $0.25) + (918 x 0.10) = $320.30.
15 more than half -12 = 9 or -6 + 15 = 9
1. A
2. D
3. C
4. 5n
5. 24 ?
6. 80
7. 5
they may not be right i honestly dont know but hopefully it helps just a little :’)
Step-by-step explanation:
4x+9y=28
-4x-y=-28
8y=0
divide both side by 8
y=0
solve for X in equation 1
4(X)-9(0)=28
4x-0=28
4x =28
divide both side by 4
4x/4=28/4
X= 7
y=0,x=7