Answer:
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y=3x-17
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Step-by-step explanation:
y=mx+b is the formula
m=slope, b=y-intercept.
Slope is given, 3
So y=3x+b
A point is also given, (3,-8) x=3,y=-8
-8=3(3) + b
-8=9+b
-17=b
So the equation is :
y=3x-17
Hope this helps, let me know if you have any questions!
Answer:
Step-by-step explanation:
One - third = 1/3
then:
one third of a number = a*1/3 = a/3
Then the equation that represents this sentence is:
2 + a/3 = 8
process:
a/3 = 8 - 2
a/3 = 6
a = 6*3
a = 18
Check:
2 + 18/3 = 8
2 + 6 = 8
You must travel at 42 mph for 4 hours
<em><u>Solution:</u></em>
Time varies inversely as rate of motion
Let "t" be the time required
Let "r" be the rate of motion
Then, we get

Where, "k" is the constant of proportionality
<em><u>You travel 3 hours at a rate of 56 mph</u></em>
Substitute t = 3 and r = 56 in eqn 1

<em><u>Find the rate you must travel for 4 hours</u></em>
r = ? and t = 4
Substitute t = 4 and k = 168 in eqn 1

Thus you must travel at 42 mph for 4 hours
It would be your first choice, y= 3/5x i believe