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Mkey [24]
2 years ago
12

I’m currently working on my quadrilaterals unit (specifically with trapezoids & kites) and I need major help on a lot of the

se problems.
Here’s one of them I need help solving (an answer would be preferable, but also an explanation.):

Mathematics
2 answers:
Natasha2012 [34]2 years ago
8 0

Check the picture below.

allochka39001 [22]2 years ago
5 0

Answer: 29.2

Step-by-step explanation:

The lengths of the two longer legs are both \sqrt{8^2 + 4^2}=\sqrt{80}

The lengths of the two shorter legs are both \sqrt{4^2+4^{2}}=\sqrt{32}

So P=2\sqrt{80}+2\sqrt{32} \approx 29.2

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the perimeter of a rectangle is 160ft. One fourth the length is the same as twice the width. Find the dimensions of the rectangl
Hitman42 [59]

Answer:

w = 80/9 ft.

L = 640/9 ft.

Step-by-step explanation:

L = length    w = width

2w = L/4  so 8w = L

160 = 2L + 2w

160 = 2(8w) + 2w

160 = 16w+2w

160 = 18w

80/9 = w

5 0
3 years ago
9. Given: line c ll line d
ozzi

Answer:

x=38°

y=25°

z=117°

Step-by-step explanation:

Since line d is a line we can say that m<z=180 degrees -(38 degrees +25 degrees)

m<z=117°

Since line c ll line d

We can say that m<y=25°(Alternate interior angles)

We can say that m<x=38°(Alternate interior angles)

x=38°

y=25°

z=117°

3 0
3 years ago
It takes 120 newspapers to fill 8 recycling bins.
masya89 [10]

Answer: 15

Step-by-step explanation:

15 newspapers in every recycling bin

3 0
2 years ago
Read 2 more answers
Determine the lateral area and the surface area of a right rectangular prism that has rectangular bases measuring 2" x 4" and a
morpeh [17]
So hmm notice the picture below

a rectangular prism, is just 6 rectangles stacked up to each other
so... to find the Surface Area, just get the area of each rectangle, notice is 3 pairs of similar rectangles, so, get their area and sum them up, that's the Surface Area of the rectangular prism

now, the Lateral Area, is just the area of the sides, laterals, so, that means, just get add up the areas of the rectangles upfront, on the back, and the ones on left and right sides, that's the Lateral Area of the rectangular prism.

8 0
3 years ago
The upper arm length of females over 20 years old in a country is approximately Normal with mean 35.8 centimeters (cm) and stand
lana [24]

Answer:

a) The range of lengths from 28.3 cm to 43.3 cm covers almost all (99.7%) of this distribution.

b) 16% of women over 20 have upper arm lengths less than 33.3 cm.

Step-by-step explanation:

The Empirical Rule(68-95-99.7 Rule) states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 35.8 cm

Standard deviation = 2.5 cm

(a) What range of lengths covers almost all (99.7%) of this distribution?

This range is from 3 standard deviations below the mean to three standard deviations above the mean.

So from 35.8 - 3*2.5 = 28.3 cm to 35.8 + 3*2.5 = 43.3 cm

The range of lengths from 28.3 cm to 43.3 cm covers almost all (99.7%) of this distribution.

(b) What percent of women over 20 have upper arm lengths less than 33.3 cm?

68% of the women over 20 have upper arm length between 33.3 cm and 38.3 cm. The other 32% have upper arm length lower than 33.3 cm or higher than 38.3. The distribution is symmetric, so 16% of the have upper arm length lower than 33.3 cm and 16% have upper arm length higher than 38.3 cm

So 16% of women over 20 have upper arm lengths less than 33.3 cm.

4 0
3 years ago
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