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Ugo [173]
3 years ago
8

NEED DONE FAST GIVING 40 POINTS

Mathematics
1 answer:
dlinn [17]3 years ago
7 0

To solve this problem you must apply the proccedure shown below:

1. The perimeter of a rectangle can be calculated with the following formula:

Perimeter=2Width+2Length

2. The width is:

Tan\alpha=opposite/adjacent\\Tan(72)=12/W\\ W=(12)(Tan(72))\\ W=3.89 in

3. Now, you must substitute the values into the formula for calculate the perimeter:

Perimeter=2(3.89in)+2(12in)\\ Perimeter=31.78in

Therefore, the answer is: 31.78 in

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What is the surface area of this rectangular pyramid?
Alexxx [7]

Answer:

304m^2

Step-by-step explanation:

First find the surface area of the base by multiplying the length by the width.

(12m) (8m)= 96m^2

Second, find the surface area of the front and back triangles using the formula <em>1/2 (base) (height)</em>. Use the length for the base.

1/2 (12m) (10m)= 60m^2

Next, find the surface area of the side triangles using the formula <em>1/2 (base) (height). </em>Use the width as the base.

1/2 (8m) (11m)= 44m^2

Last, add the surface area of each section. Make sure you add the area of each face.(we only solved for 1 of the front/ back triangles and 1 of the side triangles) To make it easier to understand I wrote out an equation to show how I added the surface areas.

base=a, front/ back triangles= b, side triangles=c

SA= a + 2b +2c  or SA= a +b +b +c +c

Using one of the equations above solve for the total surface area.

SA= (96m^2) + (60m^2) +(60m^2) +(44m^2) +(44m^2)

or

SA= (96m^2) + 2(60m^2) +2(44m^2)

SA=  (96m^2) +(120m^2) +(88m^2)

SA= 304m^2

7 0
3 years ago
Help help help help help help help help help
atroni [7]

Answer:

x=3√5

Step-by-step explanation:

This is a right angle triangle

So the equation is

2²+x²=7²

x=√7²-2²

x=3√5

8 0
2 years ago
Read 2 more answers
Jade normally leaves work at 5:00 pm, but she is leaving work 10 minutes late today. She decides to make up time by taking the t
77julia77 [94]

Answer:

It will be answer choice D.

Step-by-step explanation:

It'll take the half the usual time because she is taking a road that get's her there 2 times faster, but also add 10 because she was 10 minutes late.

5 0
3 years ago
Read 2 more answers
What is the justification for each step in solving the inequality?
Nuetrik [128]

75x+35≥7(11x+9)+4     Given

75x+35≥77x+63+4      Distributive Property

75x+35≥77x+67         Combine like terms

−2x+35≥67                 Subtraction Property of Order

−2x≥32                       Subtraction Property of Order

x≤−16                          Division Property of Order

Please give brainliest!

4 0
3 years ago
Read 2 more answers
What is the value of 20+ 3(7+4)+5+267 +9)?
just olya [345]

Answer:

334

Step-by-step explanation:

20+3(7+4)+5+267+9

=20+(3)(11)+5+267+9

=20+33+5+267+9

=53+5+267+9

=58+267+9

=325+9

4 0
3 years ago
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