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balu736 [363]
3 years ago
11

Practice with area

Mathematics
1 answer:
joja [24]3 years ago
4 0

Answer:

  1453 cm²

Step-by-step explanation:

The area of a regular polygon is given in terms of its perimeter and apothem by ...

  A = (1/2)Pa

  A = (1/2)(145.3 cm)(20 cm) = 1453 cm²

The area of the pentagon is 1453 square centimeters.

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DaniilM [7]

Answer:

1.6 hrs remaining, or 3.12 km/h

Step-by-step explanation:

7 0
2 years ago
(3,1) and (w,9); slope = -8/3<br> W= ?
alexandr1967 [171]

Answer:

w=0

Step-by-step explanation:

We know a point (3,1) and the slope (-8/3), so we can use point-slope form, which is y-y1=m(x-x1)

For reference, y1 is the y in the point, m is the slope, and x1 is the x in the point

So we subsitute it

y-1=-8/3(x-3)

do distributive prop.

y-1=-8/3x+8

add 1 to both sides

y=-8/3x+9

This is the equation of the line.

Now to find w, which is the x value.

The point will pass through line, so we can susbtitute the point into the equation.

9=-8/3x+9

subtract 9 from both sides

0=-8/3x

multiply by -3/8 on both sides (the reciprocal of -8/3), we need to isolate x

0=x

x=w

therefore, w=0

Hope this helps!

5 0
3 years ago
Please help it’s urgent
CaHeK987 [17]

Answer:

answer is 134°

Step-by-step explanation:

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7 0
3 years ago
Second Time Asking This:
sattari [20]

128 ÷3=42.66

it doesn't say if they have to pay the money back but if they do it's

128-35= 43

43÷3= 14.33

8 0
3 years ago
When the sum of 8 and a certain number is increased by 12, the result is the same as the product of 3 and the number. What is th
Roman55 [17]
ANSWER: The number is 10.
Hope this helps!!

I used the variable n as the number we needed to find. The equation was n + 8 + 12 = 3n

6 0
3 years ago
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