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3 years ago

Help a friend in need

Mathematics

1 answer:

mafiozo [28]3 years ago

7 0

a) 4.71ft

b) 3.53ft^2

Step-by-step explanation:

Perimeter is 1/2 the circumference

1/2 Circumference = 2*pi*radius

Radius = 1/2 Diameter

Radius = 3/2 = 1.5ft

Circumference = 2*pi*1.5ft = 9.42

1/2 Circumference = 4.71

4.71ft is the perimeter.

The area is 1/2 that of a full circle

A = pi*r^2

A = 3.14*1.5*1.5

A = 7.065ft^2

1/2 A = 3.53ft^2

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Answer:

$\frac{20}{3}$

Step-by-step explanation:

we have : lines 2 x + 4 y = 0 and 2 x + y = 10

Let ,

2 x + 4 y = 0............. (1)

2 x + y = 10...............(2)

solve these equations for x and y

Now subtract (2) from (1) ,we get

3y=-10

⇒y = $\frac{-10}{3}$

Put the value of y in (1) , we get

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3 years ago

Suppose Tommy walks from his home at (0, 0) to the mall at (0, 7), and then walks to a movie theater at (5, 7). After leaving th

BaLLatris [955]

For this case, what we must do is find the distance between each ordered pair.
For this, we use the formula of distance between points.
We have then:
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For (0, 0) and (0, 7):
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For (0, 7) and (5, 7):
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$d2=\sqrt{(5)^2+(0)^2}$
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For (5, 7) and (5, 0):
$d3=\sqrt{(5-5)^2+(7-0)^2}$
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$d1 + d2 + d3 = 7 + 5 + 7

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Answer:
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Answer:

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