Answer:
9
Step-by-step explanation:
(52−24)⋅12 ÷ (30+2⋅3) = 28⋅12 ÷ (30+6)
= 336 ÷ 36
= 9.333333333 = 9
If we represent Tobin's speed as x, we can write her opponent's speed as
x-2 (since Tobin is 2 more than them). In addition, since it's in miles per hour, and 45 minutes is 3/4 of an hour, we can say that 3/4ths of her speed in miles per hour is how long the race is, so (3/4)(x-2)=distance of race. In addition, since it only took Tobin 30 minutes, and 30 minutes is half an hour, x/2 (half of her miles per hour) is the length of the race, so (3/4)(x-2)=(1/2)x. Expanding it, we get 3x/4-6/4=x/2. Subtracting x/2 (or 2x/4) from both sides, we get x/4-6/4=0 and by adding 6/4 to both sides we get x/4=6/4. Multiplying 4 to both sides, we get that x=6=Tobin's speed in miles per hour
Answer:
x = -15
Step-by-step explanation:
Subtract x on both sides
x + 5 = -10
Subtract 5 on both sides
x = -15
Check work:
2(-15) + 5 = -15 - 10
-30 + 5 = -25
-25 = -25
The answer is A.) 3x-7y and -7y+3x
This is due to "3x" implies the value is positive, or "+3x", and -7y remains -7y.
So, we have 3x-7y and -7y+3x.
I hope this helps!
