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3 years ago

Please please please answer this I have the answer I just need the work for it!!!!!

Mathematics

1 answer:

MrRa [10]3 years ago

3 0

Answer:

x=80

Step-by-step explanation:

First of all, you must find the length of the side to add with 36 to equal 100. This would give you 64. So once you do that, you can do pythagorean theorem to find the length of x. This would give you 64^2 + 48^2 = x^2. Once you have this equation, you square your terms to get; 4,096 + 2,304 = x^2. After you add them you will now have 6,400 = x^2. Once you have this, you will need to do the square root of both sides of the equation; sqrt(6400) = x. This gives you x = 80.

Hope this helps!

Brainliest?

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Answer:

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Step-by-step explanation:

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4 years ago

State the degree and leading coefficient of each polynomial in one variable -12-8x^2+5x-21x^7

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Answer:

The degree is 7 and the leading coefficient is -21.

Step-by-step explanation:

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3 years ago

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3 years ago

1. Find the surface area of a square pyramid with a base length of 24 cm and a height of 16 cm. A. 1056 cm2 B. 1536 cm2 C. 816 c

Deffense [45]

We have that

1. Find the surface area of a square pyramid with a base length of 24 cm and a height of 16 cm

[surface area]=[area of 4 triangles sides]+[area of square base]
[area of square base]=24*24--------> 576 cm²

[area of one triangles side]
l=slant height
l²=16²+12²-------> l²=400-----------> l=20 cm
[area of one triangles side]=24*20/2--------> 240 cm²
[area of 4 triangles sides]=4*240----------> 960 cm²
[surface area]=[960]+[576]--------> 1536 cm²

the answer part 1) is option B) 1536 cm²

2. Use 3.14 for π and round to the nearest tenth.
Find the surface area of the cylinder
radius=8 in
height= 8 in
[surface area]=2*[area of circular base]+[Perimeter of base]*h
[area of circular base]=pi*8²----> 200.96 in²
Perimeter=2*pi*8--------> 50.24 in
[surface area]=2*[200.96]+[50.24]*8-----------> 803.84 in²

the answer Part 2) is the option C) 803.8 in²

3. Find the volume of the cylinder.
[volume of the cylinder]=[area of circular base]*h
[volume of the cylinder]=[200.96]*8---------> 1607.68 in³

the answer Part 3) is the option A.) 1607.7 in.3

4.Find the volume of a rectangular prism with the following dimensions:
Length = 5 mm
Base = 7 mm
Height = 3 mm

[volume of a rectangular prism]=L*B*H

[volume of a rectangular prism]=5*7*3----------> 105 mm³

the answer part 4) is the option B.) 105 mm3

5.Find the volume of the given pyramid.
A large pyramid has a height of 7 yards, radius of 9 yards, and base of 7 yards.
this question is incorrect

the correct question is
5a) A large pyramid has a height of 7 yards and radius of 9 yards. (pyramid with circular base)
or
5b) A large pyramid has a height of 7 yards and base of 7 yards. (pyramid with square base)

we will solve the two cases

5a) A large pyramid has a height of 7 yards and radius of 9 yards. (pyramid with circular base)
[volume of the pyramid]=pi*r²*h/3---------> pi*9²*7/3---------> 593.46 yd³

the answer Part 5a) is 593.46 yd³

5b) A large pyramid has a height of 7 yards and base of 7 yards. (pyramid with square base)

[volume of the pyramid]=b²*h/3---------> 7²*7/3---------> 114.33 yd³

the answer Part 5b) is 114.33 yd³

6.Find the volume of a square pyramid with a base length of 9 cm and a height of 4 cm.

[volume of a square pyramid]=b²*h/3---------> 9²*4/3-------> 108 cm³

the answer Part 6) is the option B.)108 cm³

4 0

3 years ago

Jeff is traveling from his home in Salem at a constant rate of 50 mph. He has already traveled 20 miles. His sister Jennifer is

leonid [27]

Answer

Find out the how long will it take Jennifer to catch Jeff.

To prove

Formula

$Speed = \frac{Distance}{Time}$

let us assume that the distance be denoted by d .

let us assume that the time be denoted by t .

As given

Jeff is traveling from his home in Salem at a constant rate of 50 mph.

He has already traveled 20 miles .

As put the values in the formula

$50 = \frac{d + 20}{t}$

50t - 20 = d

(As jeff already travelled 20 miles distance.)

As given

His sister Jennifer is making the same trip but at a constant rate of 60 mph and has only traveled 5 miles.

than put the value in the formula

$60 = \frac{d +5}{t}$

than the equation becomes

60t -5 = d

Than the two equation becomes

50t - 20 = d and 60t -5 = d

compare both the equation

50t - 20 = 60t -5

50t - 60t = 20 -5

- 10t = 15

$t = \frac{-15}{10}$

t = -1.5

(As time cannot be negative.)

t = 1.5 hours

1.5 hours will it take Jennifer to catch Jeff.

Option (A) is correct .

6 0

3 years ago