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Rufina [12.5K]
3 years ago
12

A rectangle has sides 2x + 3 and x - 4. what is the perimeter of the rectangle

Mathematics
1 answer:
amid [387]3 years ago
8 0
Write 2x+3(to the power of 2)+x-4(to the power of 2). Then do the equations and you should get 4x+9+2x+16. Combine like terms and that's your answer. I know it might be weird that it's not like 72 or something, but it's math haha. Your answer should be 6x+25! Make sure you understand this before just writing all of this down. Also, don't be afraid to ask your teacher. They are there to help!
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Solve for x.

c=8x+60

Flip the equation.

8x+60=c

Add -60 to both sides.

8x+60+−60=c+−60

8x=c−60

Divide both sides by 8.

8x/8=c−60/8

x=1/8c + −15/2

3 0
3 years ago
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What the surface area of the regular square pyramid?is (Figure is not drawn to scale.)7 cm9 cm A) 120.5 cmo B) 144 cm C) 207 cm
Sindrei [870]
The answer is C. 207 cm. The formula to find the area of a triangle is 1/2 base times height. So the base is 9cm and the height is 7cm. Multiply them and you get 63, but you have to divide by 2 because the formula so you get 31.5 cm. Multiply that by 4 because there are four triangles. So you get 126 cm. Then to find the area of the square, you do s times s. Side times side so 9 times 9 is 81. Add the 81 and 126 together and your answer is 207. hope i helped ya!!
6 0
3 years ago
PLEASE HELP!
shepuryov [24]
Well there is no picture but I think your answer should be <span><span>38/360 </span>∗100π </span>expressed as a decimal number..
D: 28.97 ft squared I believe is the answer
7 0
3 years ago
In class of 40 students, 19 play tennis, 20 play netball and 8 play both. A student is randomly chosen from the class. Determine
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Answer:

4/5 or 0.8 or 80%

Step-by-step explanation:

8 0
3 years ago
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Happy Tuesday peeps brainliest and 5 star rating!!!!!!!!!!!!!!!!!
Scorpion4ik [409]
V=150.8
V=3.14*36*h/3
V=113.04*4/3
V=452.16/3
V=150.72
7 0
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