Answer:
f(x)=7
Step-by-step explanation:
Plug in x=2 to the equation.
f(x)=5(2)-3
f(x)=10-3
f(x)=7
The multiplicative inverse of -1/3 is -3.
The product of a number and it’s multiplicative inverse equals 1.
So... -1/3 x -3/1 = 1
A negative times a negative equals a positive.
I hope this helped!
Answer: y>0
Step-by-step explanation:
Let's look at the graph. If we do the vertical line test, we can figure out that YES, it is a function, so option b and c are already out of the picture.
Now, to find the domain, look at the graph and shade it back to the x-axis. The domain includes every number greater than 3, so the domain is x>3.
To find the range, take a look at the graph and shade it back to the y-axis. The range includes every real number greater than 0, so the range is y>0
This means that d is the answer.
I really hope this helps!
Best wishes :)
X=first train speed
y=second train speed
sum of speeds is 725.2
x+y=725.2
x is 10.8 more than y
x=10.8+y
subsitute 10.8+y for x
10.8+y+y=725.2
10.8+2y=725.2
minus 10.8 from both sides
2y=714.4
divide both sides by 2
y=357.2
x=10.8+y
x=10.8+375.2
x=386
the speed of first train is 386mph
second train is 357.2mph
