ok so to start combine like terms in the problems meaning you combine the numbers that have the same variable like 7x and 3x etc.
I believe the second one : drawing a number from a hat, not replacing it, and then drawing a second number
Answer:
-10 and -5
Step-by-step explanation:
Add -10 and -5 and you get -15, multiply the two and you'll get positive 50, because multiplying two negative numbers gives you a positive number, in this case 50.
Answer:
83.91 kilograms
Step-by-step explanation:
Answer:
Step-by-step explanation:
d = 200 miles
B rate = x
A Rate = x + 20
Each has traveled two hours
The total distance each travels after two hours is 200 miles (they pass each other).
d = r * t
2*x + 2*(x + 20) = 200 Remove the brackets
2x + 2x + 40 = 200 Combine like terms
4x + 40 = 200 Subtract 40 from each side
4x = 200 - 40
4x = 160 Divide by 4
x = 160/4
x = 40
There B's rate is 40 miles / hour
A's rate is 40 + 20 = 60 miles / hour
