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ExtremeBDS [4]
3 years ago
9

Anyone know how to do this with a explanation ?

Mathematics
1 answer:
storchak [24]3 years ago
8 0

Answer:

30 degrees

Step-by-step explanation:

Since we know that all triangles equal 180 degrees, we can add the 2 given angles and subtract that from 180 to find the remaining angle.

90+60=150

180-150=30 degrees

You might be interested in
An online clothing company decides to investigate whether offering their customers a coupon upon completion of their first purch
Mila [183]

Answer:

(C) No, the probability of making a second purchase is not equal to the probability of making a second purchase given that a coupon was sent.

Step-by-step explanation:

Let A = the customer makes a second purchase within 30 days and let B = customer is sent a coupon. Events A and B are independent if P(A) = P(A | B).

P(A) = P(the customer makes a second purchase within 30 days) = \frac{50}{100} = 0.5  

100

50

​  =0.5

P(A | B) = P(the customer makes a second purchase within 30 days | customer is sent a coupon) = \frac{34}{60} = 0.567  

60

34

​  =0.567

Because P(A) ≠ P(A | B) making a second purchase is not independent of being sent a coupon.

5 0
3 years ago
Find the value of x and find the unknown angle measures.
Alborosie

Answer:

m-A=25

m-b=65

m-c=50

Step-by-step explanation:

Find the value of x

we know that

The sum of the interior angles in any triangle must be equal to 180 degrees

so

In the triangle ABC

substitute the given values

Solve for x

step 2

Find the measure of angle B

we know that

substitute the value of x

step 3

Find the measure of angle C

we know that

substitute the value of x

6 0
3 years ago
The mean gross annual incomes of certified welders are normally distributed with the mean of $20,000 and a standard deviation of
masya89 [10]

Answer:

Z=±1.65

Step-by-step explanation:

Some previous concepts

The p-value is the probability of obtaining the observed results of a test, assuming that the null hypothesis is correct.

A z-test for one mean "is a hypothesis test that attempts to make a claim about the population mean(μ)".

The null hypothesis attempts "to show that no variation exists between variables or that a single variable is no different than its mean"

The alternative hypothesis "is the hypothesis used in hypothesis testing that is contrary to the null hypothesis"

System of hypothesis

Null hypothesis: \mu=20000

Alternative hypothesis: \mu \neq 20000

If the random variable is distributed like this: X \sim N(\mu=20000,\sigma=2000)

The significance level provided is \alpha=0.1 and the value of \alpha/2= 0.05.

Since we are conducting a bilateral test, then we have two critical values. We need to find two quantiles that accumulates 0.05 of the area on the tails of the normal standard distribution. And in order to find it we can use the following excel codes:

"=NORM.INV(0.05,0,1)" , "=NORM.INV(1-0.05,0,1)"

And we got this:

z_{\alpha/2}=-1.65 and z_{1-\alpha/2}=1.65

So the correct answer for this case is:

Z=±1.65

8 0
3 years ago
In college math class of 50 student are 23 are boys 27 are girls on the final exam 15 boys and 14 girls made an A. What is the p
Mila [183]

Answer:

The probability of choosing an A student is 58% (0.58 or 29/50)

Step-by-step explanation:

The fact that 23 students are boys and 27 are girls is irrelevant to the question so we can ignore that.

There are 50 students in all and out of these students 15 boys and 14 girls made an A.

We can first add 15+14 which equals 29. So 29 students out of 50 made in A on the exam.

29/50 equals 0.58 or 58%.

3 0
3 years ago
Could you help please i dont get it
Akimi4 [234]
Answer should be 39.69 because they all payed 13.23, right? so you add 13.23 together 3 times and get ur answer
6 0
3 years ago
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