3 years ago

Solve for x. x2 = 64

Mathematics

2 answers:

Fed [463]3 years ago

5 0

Answer:

32 × 2 = 64

Step-by-step explanation:

x is being multiplied by 2 so it would be half of 64.

Marat540 [252]3 years ago

3 0

Answer:

x = ± 8

Step-by-step explanation:

Given

x² = 64 ( take the square root of both sides )

x = ± $\sqrt{64}$ = ± 8 ← note plus or minus

[ since 8² = 64 and (- 8)² = 64 ]

You might be interested in

Anna tossed 3 coins in the air. What is the probability that exactly 2 of the coins show heads? Look back at all of the possible

hram777 [196]

2/3 would be heads because it’s out of 3 coins

5 0

2 years ago

What is 14/74 in simplest form

charle [14.2K]

14/74 in the simplest form is 7/37

5 0

3 years ago

Triangle DEF has vertices D(0,4), E(10,4), and F(5,9) Prove that the triangle is isosceles and a right triangle.

LUCKY_DIMON [66]

Answer:

darling, could you send a picture of the problem?

Step-by-step explanation:

8 0

3 years ago

If you spend 600 rupees per month, that is the amount of loan in 6 months. If he spends 440 rupees per month, he repays the loan

Marta_Voda [28]

Answer:

hjskkdoododkdkdndndndndndndndnsn sorry I needed points to ask a question

8 0

3 years ago

Find the variance of the following data. Round your answer to one decimal place. x 1 2 3 4 5 P(X=x) 0.3 0.2 0.2 0.1 0.2

Reptile [31]

The variance of a distribution is the square of the standard deviation

The variance of the data is 2.2

<h3>How to calculate the variance</h3>

Start by calculating the expected value using:

$E(x) = \sum x* P(x)$

So, we have:

$E(x) = 1 * 0.3 + 2* 0.2 +3 * 0.2 + 4 * 0.1 + 5 * 0.2$

This gives

$E(x) = 2.7$

Next, calculate E(x^2) using:

$E(x^2) = \sum x^2* P(x)$

So, we have:

$E(x^2) = 1^2 * 0.3 + 2^2* 0.2 +3^2 * 0.2 + 4^2 * 0.1 + 5^2 * 0.2$

$E(x^2) = 9.5$

The variance is then calculated as:

$Var(x) = E(x^2) - (E(x))^2$

So, we have:

$Var(x) = 9.5 - 2.7^2$

$Var(x) = 2.21$

Approximate

$Var(x) = 2.2$

Hence, the variance of the data is 2.2