All categories

3 years ago

Please help meeeeeeeeeeeeëeeeeeeeeeeeeeeeeèeeeeeeeeeeeeêeeeeeeeeeeeeęeeeeeeeeeeeeeeeeeeeeeeeeeeeéeeeeeeeeeeeeêeeeeeee

Mathematics

2 answers:

Anna007 [38]3 years ago

8 0

Hello!

to find b, let's subtract the squares of the hypotenuse and leg a to find b. We will then find the square root of our answer.

169-144=25

√25=5

Therefore, b=5

I hope this helps!

Lady_Fox [76]3 years ago

5 0

The pythogrean theorem is a^2+b^2=c^2

"a" and "b" are the legs, and "c" is the hypotenuse.

so 12^2+b^2=13^2

144+b^2=169, subract 144 from both sides.

b^2 = 25, take the square root from both sides.

Hence b=5

You might be interested in

A number is 8 more than 32. Find the number. Let n = number. write the equation

Butoxors [25]

<span>Let n = number

n = 32 + 8
n = 40</span>

7 0

3 years ago

Drummers march in two patterns for one song. One pattern has

Dafna11 [192]

Answer:

Suppose we have a total of 16 drummers.

for the first pattern we have 2 drummers in each row, this means that we have a total of 16/2 = 8 rows.

Now, for the second pattern, we have 4 times as many in each row, so we have 4*2 = 8 drummers in each row, then we have 16/8 = 2 rows.

You can see that in each pattern we have the same number of drummers, but a different number of rows.

Now, we only can do this if the total number of drummers is a multiple of 8 (because in the second part we want 8 drummers in each row, so if we want that the numbers of rows to be a whole number, then we must have that the total number of drummers is a multiple of 8)

7 0

3 years ago

A. submarine is at the surface of the ocean preparing to dive .it submerges and dives to -972 feet. then.it has ascends 308 feet

lisabon 2012 [21]

The submarine is at -664 feet

5 0

3 years ago

a normal distribution with a mean of 25 minutes with a population standard deviation of 5 minutes. The store manager sampled 100

sergiy2304 [10]

Answer:

$z=\frac{24.25-25}{\frac{5}{\sqrt{100}}}=-1.5$

The p value for this case would be given with this probability:

$p_v =P(z$

For this case since the p value is higher than the significance level of 0.01 we have enough evidence to fail to reject the null hypothesis and we don't have enough evidence to conclude that the true mean is significantly less than 25 min.

Step-by-step explanation:

Information given

$\bar X=242.5$ represent the sample mean

$\sigma=5$ represent the population deviation

$n=100$ sample size

$\mu_o =25$ represent the value to check

$\alpha=0.01$ represent the significance level

z would represent the statistic

$p_v$ represent the p value

Hypotheis to test

We want to verify if the true mean is less than 25 min, the system of hypothesis would be:

Null hypothesis: $\mu \geq 25$

Alternative hypothesis: $\mu < 25$

The statistic would be given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

And replacing the info given we got:

$z=\frac{24.25-25}{\frac{5}{\sqrt{100}}}=-1.5$

The p value for this case would be given with this probability:

$p_v =P(z$

4 0

3 years ago

A group of friends were working on a student film that had a budget of $640. They spent all their budget on equipment and props.

iris [78.8K]

136
Step-by-step explanation:
Amount spend on props and equipment = 800
Percentage of amount spend on equipment = 83%
So,
Percentage of amount spend on props =
Therefore,
Amount spend on props

5 0

3 years ago