Question #ddb76
2 Answers
Nov 29, 2017
C, 5 cents
Explanation:
Let B stand for Bat and b stand for ball
If the total cost for the bat and ball is $1.1, an equation could be:
Since the Bat costs $1 more than the ball, the equation for Bat could be b + 1
Now put that equation into B, so
Solve for b
Subtract 1 on both sides
Divide both sides by 2
The ball therefore costs 0.05, which is 5 cents.
Nov 29, 2017
A common puzzler... Not obvious because the prices are inter-related, and not just additive.
[C] 5 cents
Explanation:
Bat + Ball = 1.10
Bat = Ball + 1.00 Substitute into the first one:
Ball + 1.00 + Ball = 1.10
2Ball = 0.10
Ball = 0.05 (5 cents)
Then Bat = Ball + 1.00 = 1.05
CHECK:
Bat + Ball = 1.10
1.05 + 0.05 = 1.10 Correct!