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3 years ago

Is -7 an integer or a irrational number ?

Mathematics

1 answer:

Goshia [24]3 years ago

5 0

Answer:

Integer

Step-by-step explanation:

Integer :a number which is not a fraction; a whole number that can be Positive or negative

Hope this helps.. Good Luck

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What is the Volume of the square pyramid? (Round to the nearest tenth as needed)

goldenfox [79]

Answer:

5229 mm³

Step-by-step explanation:

Volume of square pyramid

$\sf \boxed{Volume \ of \ the \ square \ pyramid = \dfrac{1}{3}*b^2*H}$

b = base length = 25 mm

H = height

We have to find 'H' using Pythagorean theorem,

slant height (hypotenuse) = 28 mm

leg₁ = base length ÷ 2 = 25÷2 = 12.5

leg₂ = H

H² + (12.5)² = 28²

H² = 784 - 156.25

= 627.75

$\sf H = \sqrt{627.75}$

H = 25.01 mm

$\sf \text{Volume of square pyramid =$\dfrac{1}{3}*25*25*25.1$ }$

= 5229 mm³

$\sf \boxed{\text{Volume of square pyramid = \dfrac{1}{3}*25*25*28}}$

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2 years ago

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The function f is defined by f(x) = 2x²-1.<br> Find f (2x).

umka21 [38]

Answer: $f(2x)=8x^2-1$

Step-by-step explanation:

All that is required here is to substitute x = 2x into the right side in the same way that is done for a numeric value.

$f(2x) = 2(2x)^2-1\\f(2x) = 2(4)x^2-1\\f(2x) = 8x^2-1\\$

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3 years ago

I really need help for these pleaseee!!!

Naddik [55]

Answer:

pat

Step-by-step explanation:

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3 years ago

HELP WILL GIVE BRAINLIEST!!!!

iris [78.8K]

Answer:

2 x 20^2

Step-by-step explanation:

I did it on paper and looked it up to make sure

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3 years ago

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PLEASE HELP ME ( I ADDED A PHOTO)

Nostrana [21]

Answer:

Which one do you need help with

Step-by-step explanation:

Im not just taking points I will still help you in the comments.

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3 years ago

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