6 inches. explanation: if 2 in= 1 mile then multiple 2 by 3 (# of miles) & you get 6
Answer:
63:147
Step-by-step explanation:
Because 3*21= 63 and 7*21= 147
X --- <span>first number
y --- </span><span>second number
x + y = 2x - 15
x - y = 2y - 5
x - 2x + y = -15
x - y - 2y = - 5
-x + y = -15
x - 3y = - 5
-----------------
-2y = -20 /:(-2)
y = 10
</span>x - 3y = - 5 ⇒ x = - 5 + 3y = - 5 + 3 · 10 = - 5 + 30 = 25
Ans.:
x = 25
y = 10
The answer is b as in the tank loses 2 liters of water every hour so 2x1 is one hour etc.
