Answer:
Step-by-step explanation:
x-4y=2
4y=x-2
y=1/4 x-1/2
slope=1/4
4x+y=8
y=-4x+8
its slope=-4
product of slopes=1/4×(-4)=-1
so lines are perpendicular.
Answer:
y = 2 (x + 3)² − 4
Step-by-step explanation:
y = 2x² + 12x + 14
First, factor the leading coefficient from the first two terms:
y = 2 (x² + 6x) + 14
Complete the square. Take half of 6, square it, then add and subtract.
(6/2)² = 3² = 9
y = 2 (x² + 6x + 9 − 9) + 14
Simplify:
y = 2 (x² + 6x + 9) − 2(9) + 14
y = 2 (x² + 6x + 9) − 18 + 14
y = 2 (x² + 6x + 9) − 4
Factor the perfect square.
y = 2 (x + 3)² − 4
Draw a graph that joins the points (100, 120) and (50, 95) and has a slope = 2
Draw a graph that joins the points (120, 100) and (95, 50) and has a slope = 2
Draw a graph that joins the points (120, 100) and (95, 50) and has a slope = 0.50
Answer:
The correct answer is A. Draw a graph that joins the points (100, 120) and (50, 95) and has a slope = 0.50
Step-by-step explanation:
1. Let's review the information given to us for solving the question:
Total of megabytes of date used = x
Total monthly charges = y
x₁ = 50 Megabytes, x₂ = 100 Megabytes
y₁ = US$ 95, y₂ = US$ 120
2. Let's find out the best description of the steps to draw the graph and the slope.
Slope = (y₂ - y₁)/ (x ₂- x₁)
Slope = 120 - 95/ 100 - 50
Slope = 25/50 = 1/2 = 0.50
Remember that the coordinates of the points in the line are written this way:
(x, y) ⇒ (Total of megabytes of date used, Total monthly charges)
The correct answer is A. Draw a graph that joins the points (100, 120) and (50, 95) and has a slope = 0.50
Answer:
a
Step-by-step explanation:
100% on test
If the volume and the height are known, then we can find the base area of a rectangle prism by these steps:
Find the area of two sides (Length*Height)*2 sides
Find the area of adjacent sides (Width*Height)*2 sides
Find the area of ends (Length*Width)*2 ends
Add the three areas together to find the surface area
We know that,
Surface Area of Rectangular Prisms :
A rectangular prism has 2 ends and 4 sides. Opposite sides have the same area. The surface area is the sum of the areas of all six sides.
Here, we have,
to find the surface area of Rectangular Prisms:
Find the area of two sides (Length*Height)*2 sides
Find the area of adjacent sides (Width*Height)*2 sides
Find the area of ends (Length*Width)*2 ends
Add the three areas together to find the surface area
Example:
The surface area of a rectangular prism 5 cm long, 3 cm. wide and 2 cm. high = 5*2*2 + 3*2*2 + 5*3*2 = 20 + 12 + 30 = 62 cm^2.
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