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Sliva [168]
2 years ago
10

In ΔPQR, ∠P and ∠Q are complementary angles. If sin Q = 3/5, then what is cos P + cos q

Mathematics
1 answer:
antiseptic1488 [7]2 years ago
3 0

Answer:7/5

Step-by-step explanation:

You might be interested in
Suppose the scores on an exam are normally distributed with a mean μ = 75 points, and standard deviation σ = 8 points.
Artyom0805 [142]

Answer:

P(X>69)=P(\frac{X-\mu}{\sigma}>\frac{69-\mu}{\sigma})=P(Z>\frac{69-75}{8})=P(Z>-0.75)

And we can find this probability on this way:

P(Z>-0.75)=1-P(Z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problm

Let X the random variable that represent the scores on an exam of a population, and for this case we know the distribution for X is given by:

X \sim N(75,8)  

Where \mu=75 and \sigma=8

We are interested on this probability

P(X>69)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X>69)=P(\frac{X-\mu}{\sigma}>\frac{69-\mu}{\sigma})=P(Z>\frac{69-75}{8})=P(Z>-0.75)

And we can find this probability on this way:

P(Z>-0.75)=1-P(Z

4 0
3 years ago
7 ones 6 tenths = _____________ tenths<br><br> PLS HELP!!!
dimaraw [331]

Answer:

7.6?

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Place the steps to solve 2(x + 3) - 5x &gt; 18 in order.
lakkis [162]

Answer:

-4

Step-by-step explanation:

That's the answer above

8 0
2 years ago
Is 4x^2+y=8 a linear equation
Rainbow [258]

Answer:

No, linear function graphs always have the x raised to the first power

5 0
3 years ago
1. Using the figure below, what is the measure of angle ABE?
kow [346]

Answer:

The angle of ∠ABE is 40°.

Step-by-step explanation:

Given that ∠ABE and ∠CBD are opposite vertical angles so they have the same measure of angles.

Because ∠ABE and ∠CBD are vertical angles, ∠ABE = ∠CBD = 40°.

please mark me brainliest :)

6 0
2 years ago
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