Answer:
38.5
Step-by-step explanation:
Lets say, first number = x
Second number = 3x+7
Total = 49
(x)+(3x+7)= 49
4x+7 = 49
4x = 42
x = 42/4
x= 10.5
x= 10.5
3x+7 = 3(10.5)+7 = 38.5
Hope this helps!!
Take the cos-1 of both sides to get 3x=30 then divide by 3 to get ×=10
30,000 divided by 30 is 1,000
Answer:
$15
Step-by-step explanation:
Can't help you with the drop down, as we need to know the info for Station A to be able to compare it with Station B, however, the cost for charging a car at Station B for 4 hours is:
use f(x) = 3x + 3 as the value of x = 4 falls in this function's interval
So f(4) = (3 x 4) + 3 = 15
So it will cost $15 for a car to charge for 4 hours at Station B.
Put 2 over 1 then multiply straight across
