4 years ago

Screenshot with answers included A circle has a radius of 1 cm.

1 answer:

6 0

Area = $\pi r^{2}$
area = $\pi$ x 1 x 1 = $\pi$

Circumference = $2\pi r$
Circumference = 2 x $\pi$ x1
Circumference = 2 $\pi$

The circumference is greater than the area

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Perpendicular to y=2x+9 and has the point (4,-1)

Wewaii [24]

Answer: y = $-\frac{1}{2}$ x + 1

Step-by-step explanation:

First, we will find the slope. The slope of perpendicular lines are negative reciprocals.

In this case, the first slope is 2. The negative of 2 is -2, and the reciprocal of -2 is $-\frac{1}{2}$ .

Now, we will plug in this new slope, the point given, and solve for the b, or the y-intercept.

y = mx + b

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-1 = -2 + b

1 = b

Lastly, we will write our equation.

y = mx + b

y = $-\frac{1}{2}$ x + 1

The line is y = $-\frac{1}{2}$ x + 1, or y = 1 - $\frac{x}{2}$ .

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Step-by-step explanation:

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Find the surface area of a rectangular prism measuring 5 m by 8 m by 9 m.

olganol [36]

The formula of the surface area of the rectangular prism is equal:
$A=2(wl+wh+lh)$
where:
l - length
w - width
h - height
We have:
l = 5m
w = 8m
h = 9m
Substitute:
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3 years ago