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2 years ago

Plz help get the right answer

Mathematics

2 answers:

Serhud [2]2 years ago

8 0

2x-8 and -(10x^2+x+3)

Contact [7]2 years ago

7 0

Answer:

7x^(2)+4x-11

Step-by-step explanation:

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What is the surface area in square millimeters of the triangular pyramid?

alukav5142 [94]

Answer:

31 mm² is the surface area.

Step-by-step explanation:

We know that:

Surface area of triangle = 3(1/2 x 4 x 4) + (1/2 x 4 x 3.5)

Work:

3(1/2 x 4 x 4) + (1/2 x 4 x 3.5) mm²
=> 3(2 x 4) + (2 x 3.5) mm²
=> 24 + 7 mm²
=> 31 mm²

Hence, 31 mm² is the surface area.

Hoped this helped.

$BrainiacUser1357$

4 0

1 year ago

How do you calculate the perimeter of a circle

sasho [114]

Answer:

Perimeter= πd or Perimeter= 2πr

Step-by-step explanation:

d= diameter

r = radius

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2 years ago

A and b are natural numbers. The diameter of cell a is 2.3 , and the diameter of cell b is 2.3 .

Pani-rosa [81]

After clarification we see the respective diameters are

$A = 2.3 \times 10^{-a}$

$B = 2.3 \times 10^{-b}$

We're asked about the ratio

$A:B = 2.3 \times 10^{-a} : 2.3 \times 10^{-b} = 10^{-a} : 10^{-b} = 10^b : 10^a = 10^{b-a} : 1$

Now we can go through the choices.

A. If a = 4 and b = 6, then cell a is 100 times greater than cell b.

$A:B=10^{6-4}:1 = 100:1$

It would be more proper to say the diameter of cell A is 100 times the diameter of cell B, but yes, this is TRUE.

B. If a = 4 and b = 6, then cell b is 100 times greater than cell a.

FALSE. 10 to the minus 4 is 100 times bigger than 10 to the minus 6, so a is bigger.

C. If a = 4 and b = 6, then cell a is 2 times greater than cell b.

FALSE. We already calculated its 100 times bigger.

D. If a = 4 and b = 6, then cell b is 2 times greater than cell a.

FALSE.

8 0

3 years ago

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Apples are on sale for $3.12 per kilogram is the total cost of apples proportional to the total mass?

zloy xaker [14]

Answer:

yes

Step-by-step explanation:

(there really isn't much else to say, it's quite simple)

5 0

2 years ago

Linda watched a video. The introduction is 2 minutes, and the video is 7 minutes. What percentage of the video is the introducti

kolezko [41]

Answer:

22.222222%

Step-by-step explanation:

all together the entire video is 9 min and 2 of those are the intro so 2/9 and that as a percent is the answer

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2 years ago

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