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4 years ago

I need help with this problem. This is confusing with this formula.

Mathematics

1 answer:

zaharov [31]4 years ago

7 0

Answer:

v = 40 . . . ft/sec

Step-by-step explanation:

Put the value 25 where h is in the formula and do the arithmetic.

V = √(64·25) = (√64)(√25) = 8·5

V = 40 . . . . feet per second

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2 hundreds equal how many tens? <br><br> Lets see if ya'll know the answer cause i do

tekilochka [14]

Answer:

200 is equal to 20 tens I guess lol

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3 years ago

Read 2 more answers

Pls help or explain steps

Tems11 [23]

Solving for a variable means to rewrite the equation so that the desired variable is alone on one side. So, we have to "move" all the other variables/constants in order to make this happen. We are allowed to add/subtract the same quantity from both sides, or to multiply/divide both sides by any non-zero number.

Let's start with the first example: we are given

11. $d=rt$

the variable $r$ is not alone on the right hand side because it is multiplied by $t$ . We can reverse this by dividing both sides by $t$ : the equation becomes

$\dfrac{d}{t}=\dfrac{rt}{t}=r$

So, we have written the equation as $r=\frac{d}{t}$ , which means that $r$ now sits alone on one side of the equation, and thus we have solved the equation for $r$ !

Similarly, we do all the others:

12. $f=v+at$

Subtract $at$ from both sides to get

$f-at=v$

13. $Ax+By=C$

Subtract $By$ from both sides to get

$Ax=C-By$

Now divide both sides by $A$ to get

$x = \dfrac{C-By}{A}$

14. $A=\frac{1}{2}Pl$

Multiply both sides by 2:

$2A=Pl$

Divide both sides by $P$ :

$\dfrac{2A}{P}=l$

4 0

3 years ago

Read 2 more answers

NEED HELP WILL MARK BRAINLIEST

dimulka [17.4K]

Answer:

its b, hope this helps.

5 0

3 years ago

We are interested in determining whether or not the variances of the sales at two small grocery stores are equal. A sample of 21

katen-ka-za [31]

Answer:

$F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996$

Step-by-step explanation:

Data given and notation

$n_A = 21$ represent the sampe size for A

$n_B =16$ represent the sample size for B

$s_A = 28.284$ represent the sample deviation for A

$s_B = 20$ represent the sample deviation for B

$\alpha$ represent the significance level provided

F test is a statistical test that uses a F Statistic to compare two population variances, with the sample deviations s1 and s2. The F statistic is always positive number since the variance it's always higher than 0. The statistic is given by:

$F=\frac{s^2_1}{s^2_2}$

Solution to the problem

System of hypothesis

We want to test if we have the same variation, so the system of hypothesis are:

H0: $\sigma^2_A = \sigma^2_B$

H1: $\sigma^2_A \neq \sigma^2_B$

Calculate the statistic

Now we can calculate the statistic like this:

$F=\frac{s^2_A}{s^2_B}=\frac{28.284^2}{20^2}=1.99996$

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4 years ago

Find the circumference of the circle. Use 3.14 for it. Round to the nearest hundredth,

lilavasa [31]

Answer:

9.43 in i think

Step-by-step explanation:

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3 years ago

I need help with this problem. This is confusing with this formula.​

I need help with this problem. This is confusing with this formula.