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spin [16.1K]
3 years ago
14

Can someone help? Not great with geometry and I don't get this

Mathematics
1 answer:
Pie3 years ago
7 0

Answer: Angle OZP= 62 Angle PZQ=63

(4r+2)+(5r-12)=125

9r-10=125

9r=135

r=15

Angle OZP Angle PZQ

4(15)+2 5(15)-12

62 63

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A rational number whose square root is a whole number. True or False
Marta_Voda [28]

Answer:

Step-by-step explanation:

FALSE

6 0
3 years ago
What is the value of x in the equation 0.7x – 1.4 = –3.5?<br> –7<br> –3<br> 3<br> 7
Lynna [10]
-3

1. Add -1.4 to each side.
2. Divide by 0.7 on each side.

Hope this helps
4 0
3 years ago
Read 2 more answers
Rachael got a 550 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are normally distributed and have m
valina [46]

Answer:

Z=-2

This value means that the score of Rachel 550 it's 2 deviations below the mean of the population \mu=600

Step-by-step explanation:

1) 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".  

\mu=600 represent the population mean for the Graduate Record Exam (GRE)

\sigma=25 represent the population standard deviation for Graduate Record Exam (GRE)

2) Solution to the problem

Let X the random variable that represent the Graduate Record Exam (GRE) of a population, and for this case we know the distribution for X is given by:

X \sim N(600,25)  

Where \mu=600 and \sigma=25

We want to find the z score for a score of 550. And in order to do this we need to apply the formula for the z score given by:

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

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

z=\frac{550-600}{25}=-2

So the answer for our case would be Z=-2

This value means that the score of Rachel 550 it's 2 deviations below the mean of the population \mu=600

7 0
3 years ago
-4.25 ⋅ (3/10 + 1/5)
elixir [45]

Answer: -0.85

Step-by-step explanation:

3/10 + 1/5 = 1/2

1/2 x -4.25 = -0.85

3 0
1 year ago
Translate the phrase "in 3 years" into algebraic terms
Semenov [28]

Answer:

In three years can be into algebraic terms as:  3 + x. Where 'x' comes to be today's age.

For example, my age in three years will be:

If I'm 24 years right now, My age in three years = 3 + x ⇒ My age in three years = 3 + 24 = 27.

3 0
3 years ago
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