The Solution:
Given:
Plan A:
Each text sent or received cost $0.10.
If x=number of texts sent or received in a month, the total cost is:
Plan B:
Users pay a fixed charge of $12 and an additional $0.02 for each text sent or received. So, we have the expression for the total charges as:
Part (a)
Writing the inequality that shows that to use plan A is cheaper than using plan B, we have:
Part (b)
Solving the inequality in part (a) above, we have:
Dividing both sides by 0.08, we have:
Therefore, the correct answer is [option 2]
Answer:
y=5x+10
Step-by-step explanation:
y-11=5(x+2)
y-11=5x+10
+11 +11
y=5x+21
The answer should be D. I believe so
Bring the x’s to one side and the numbers to the other, as if it were an equal sign, not an inequality.
4x+10 > 2x+5
4x-2x > 5-10
2x > 5
X > 2.5
In the case where u have to multiply by a negative number, change the direction of the inequality sign.
Eg.
-2x > 4
2x < -4
X < -2
Graph of y = -3/2x - 7 has a slope of -3/2.
For perpendicular lines the product of the slopes is -1.
m1m2 = -1
-3/2m2 = -1
m2 = -1/(-3/2) = 2/3
The required equation,
y - (-2) = 2/3(x - 3)
y + 2 = 2/3x - 2
y = 2/3x - 4
