So an equation of any line is y=mx+b.
We know that the m, or slope, equals 3.
y=3x+b
Now we find the b, or the y-intercept, by substituting the x and y values into their places.
4=3*1+b
4=3+b
b=1
Now that we have the y-intercept, we just substitute the m and b into the equation and receive our final answer:
y=3x+1
Answer:
The original price of the sterio was $82.50
Answer:1. x<3
2.x>3
Step-by-step explanation:
Number 1.
Step 1: Add 9 to both sides.
7x−9+9<12+9
7x<21
Step 2: Divide both sides by 7.
7x
7
<
21
7
x<3
Number 2.
1x+8>11
Step 1: Simplify both sides of the inequality.
x+8>11
Step 2: Subtract 8 from both sides.
x+8−8>11−8
x>3
leave alike if this help please.
Size 40 is the cheapest, because the formula to find lowest price of unit is dividing the price by the unit. so 5.49/24≈ 0.23, 8.00/40=0.2, 15.99/64≈ 0.25
