B. Kayla walks 23 4/5 miles in 7 days, the reason is because there are 7 days in a week and it says, "Kayla walks 3 2/5miles each day! (KEY WORK. EACH DAY) so since there is only 7 days in a week than the answer is B. If I am wrong please correct me. Hopefully this helps!
The answer is <span>B) 41</span>
Step 1: Find x and y
Step 2: Calculate 5x + 7y
Step 1.
2x + 3y = 17
3x + 4y = 24
_________
Multiple the first equation by 3, and the second one by -2:
3 * 2x + 3 * 3y = 3 * 17
(-2) * 3x + (-2) * 4y = (-2) * 24
_________
6x + 9y = 51
-6x - 8y = - 48
_________
Sum up these two equations:
6x + 9y + (-6x - 8y) = 51 + (-48)
6x + 9y - 6x - 8y = 51 - 48
_________
6x can be canceled:
9y - 8y = 3
y = 3
Now, replace y in one of the equtions:
3x + 4y = 24
3x + 4*3 = 24
3x + 12 = 24
3x = 24 - 12
3x = 12
x = 12/3 = 4
Step 2:
Now that we know that x = 4 and y = 3, we can calculate <span>5x +7y:
5x + 7y = 5 * 4 + 7 * 3 = 20 + 21 = 41</span>
How much more
needed=100%
saved=60%
more=100%-60%=40%
find 40% of 120
40% of 120=0.4 times 120=48
answer is $48
1 gallon = 16 cups
How many cups is equal to 2.5 gallons?
2.5 gallons * 16cups/gallon = 2.5 * 16 cups = 40 cups
There are 40 cups in a 2.5 gallon.
$300 cause it’s lower than 350$