Answer:
x = 12
y = 9
12 coins of dimes
9 coins of quartes
Step-by-step explanation:
x ---> coins of dimes
y ---> coins of quartes
x + y = 21
0.1x + 0.25y = 3.45 * 100
x + y = 21 L1
10x + 25y = 345 L2
x = 21 - y
Reemplace in L2
10(21 - y) + 25y = 345
210 - 10y + 25y = 345
15y = 345 - 210
15y = 135
y = 9
x = 21 - y
x = 21 - 9
x = 12
Answer:
97in³
Step-by-step explanation:
L = 5.5, W = 2, H = 5
2(h × W) + 2(h × L) + 2(W × L)
= 2(5*2) + 2(5*5.5) + 2(2*5.5)
= 2(10) + 2(27.5) + 2(11)
= 20 + 55 + 22
= 97in³
Answer:
D. x = 12
Step-by-step explanation:
Answer:
7.99 or D
Step-by-step explanation:
It is simple addition.
