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3 years ago

Twice a number is 10. What is the number? equation: n =

1 answer:

8 0

2n = 10
n = 5 (Divide both sides by 2)

Sorry if there wasn't enough working but it's a fairly simple equation, comment if you'd like more info on the formation of it.

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What's the value of x ?

Helen [10]

the formula for the Pythagorean theorem is a squared plus b squared is equals to c squared we don't have our a so it will be 8 * 8 =64which is 64 is equals to 10 * 10 which is 100 - 64 is equals to 36 then you square root do square roots the 36 which is 6

5 0

4 years ago

Right answer gets brainlist

jok3333 [9.3K]

Answer:

there ain't nun to answer here

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

A person recently read that 84% of cat owners are women. How large a sample should the researcher take if she wishes to be 90% c

Lana71 [14]

Answer:

405

Step-by-step explanation:

To find sample size, use the following equation, where n = sample size, za/2 = the critical value, p = probability of success, q = probability of failure, and E = margin of error.

$n=\frac{(z_{\frac{\alpha }{2} })^{2} *p*q }{E^2}$

The values that are given are p = 0.84 and E = 0.03.

You can solve for the critical value which is equal to the z-score of (1 - confidence level)/2. Use the calculator function of invNorm to find the z-score. The value will given with a negative sign, but you can ignore that.

(1 - 0.9) = 0.1/2 = 0.05

invNorm(0.05, 0, 1) = 1.645

You can also solve for q which is 1 - p. For this problem q = 1 - 0.84 = 0.16

Plug the values into the equation and solve for n.

$n =\frac{(1.645)^2*0.84*0.16}{(0.03)^2}\\n= 404.0997333$

Round up to the next number, giving you 405.

6 0

3 years ago

What it means by that

denpristay [2]

Example A means

For every #of felt pieces you multiply that by the cost of one piece of felt to see how much you spent

Example
Felts cost $3 a piece
You get 7 pieces

7 x 3= 21

You spent $21 on felt

3 0

3 years ago

Which of the following is not a solution of the equation y=3x−4 ?

lisabon 2012 [21]

Answer:

(-1, -1) is not a solution to the system

Step-by-step explanation:

Y = 3x - 4. Substitute the points for x and y

2 = 3(2) - 4

2 = 2 solution

y = 3x - 4

-4 = 3(0) - 4

-4 = -4 solution

y = 3x - 4

8 = 3(4) - 4

8 = 8 solution

y = 3x - 4

-1 = 3(-1) - 4

-1 = -7 not solution

6 0

3 years ago