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3 years ago

If (0.2)x = 2 and log 2 = 0.3010, then the value of x to the nearest tenth is:

Mathematics

1 answer:

MaRussiya [10]3 years ago

6 0

The answer is C i know for a fact

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What is the solution of StartRoot x + 12 EndRoot = x?

Ber [7]

Answer:

x = 4 or x = -3

Step-by-step explanation:

$\sqrt{x+12}=x$

Take square both the sides,

$(\sqrt{x+12})^{2}=x^{2}\\\\x+12=x^{2}$

x² - x - 12 = 0

x² - 4x + 3x - 3*4 =0

x*(x - 4) + 3*(x - 4)= 0

(x- 4 )(x+3) =0

x -4 =0 or x + 3 = 0

x = 4 or x = -3

4 0

3 years ago

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Which statements are true? (look at picture)

Makovka662 [10]

Answer:

D is true, E is true, F is true

Step-by-step explanation:

Hello,

n is an odd number it means that n = 2a+1 where a is integer

$n^2-1=(2a+1)^2-1=4a^2+4a+1-1=4a(a+1)$

this is not an odd number

$n(n-1)=(2a+1)2a$

this is not an odd number

$(n-1)^2=(2a+1-1)^2=4a^2$

this is not an odd number

$n^2+2=(2a+1)^2+2=4a^2+4a+1+2=4a^2+4a+3= 2(2a^2+2a+1)+1$

so this is an odd number

$n(n-2)=(2a+1)(2a-1)=4a^2-1=4a^2-2+1=2(2a^2-1)+1$

so this is an odd number

$(n-2)^2=(2a+1-2)^2=(2a-1)^2=4a^2-4a+1 = 2(2a^2-2a)+1$

this is an odd number

hope this helps

7 0

3 years ago

Find the surface area of a square pyramid with a length of 5 cm and a slant height of 8cm.

Tems11 [23]

Area of the square base = 5^2 = 25 cm^2
Area of one of the triangular side = 1/2 * 5 * 8 = 20 cm^2 and there are 4 sides
So the surface area of while pyramid = 4 * 20 + 25 = 105 cm^2

Volume of the cone = (1/3) pi r^2 h
= (1/3) pi * 5^2 * 8
= 209.44 ft^2

8 0

3 years ago

A prism is completely filled with 3996 cubes that have edge lengths of 13 in.

irina [24]

The answer is 148, what grade are you in that’s really easy unless you didn’t pay attention. , anyways keep up

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2 years ago

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Convert the repeating decimal to a fraction. 0.324 =

Andreas93 [3]

repeating decimal to a fraction. 0.324 = 324/999

hope it helps

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3 years ago

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