Answer:
A) 49x^2-36 km
Step-by-step explanation:
Remember that speed is equal to distance divided by time. Therefore, if you multiply time with speed, then you get the distance traveled.
So, we will do (7x+6) kph multiplied by (7x-6) hours to get 49x^2-36 km.
Pick out the like terms. 6x^2 (which equals 36x), 11x, 2x^2 (which equals 4x), -17x.
36+11+4= 51, -17= 34x
-3+-4= -7
The simplified expression would be 34x+-7.
(This could be wrong though, I'm sorry if it is ^^)
Answer:
$455.84
Step-by-step explanation:
Simplify 2.8y + 6 + 0.2y to 3y + 6
subtract 3y from both sides
simplify 5y - 15 - 3y to 2y - 15
add 15 to both sides
simplify 6 + 15 to 21
divide both sides by 2
switch sides
Answer: y = 21/2
*in decimal form this would be 10.5
So, 6/7*56/1
56*6/7
336/7
the answer is 48
