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Gwar [14]
4 years ago
8

For circle P , find QN if LM = ON = 7. A. 3.5 B. 7.5 C. 14 D. 21

Mathematics
1 answer:
lianna [129]4 years ago
6 0

Answer:

A

Step-by-step explanation:

You are just going to have to divide the 7 which gives you 3.5

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<img src="https://tex.z-dn.net/?f=4%20%2B%20y%20%3D%209.5" id="TexFormula1" title="4 + y = 9.5" alt="4 + y = 9.5" align="absmidd
s2008m [1.1K]

4 + y = 9.5

subtract 4 from both sides :

4 + y - 4 = 9.5 - 4

y = 5.5

8 0
3 years ago
What is the formula of (2x+3y)²​
zhannawk [14.2K]

Answer:

4x²+12xy+9y²

(2x+3y)²

=(2x+3y)*(2x+3y)

2x *2x , 2x *3y , 3y* 2x ,3y* 3y

=4x²+12xy+9y²

6 0
2 years ago
A pediatrician wishes to study how the average weight Y (in kilograms) of children changes during the first year of life. He plo
leonid [27]

Answer:

Answer is option a ) 0.53

Step-by-step explanation:

slope = r*\frac{s_y}{s_x}

Given that a pediatrician wishes to study how the average weight Y (in kilograms) of children changes during the first year of life. He plots these averages versus the age X (in months) and decides to fit a least-squares regression line to the data with X as the explanatory variable and Y as the response variable.

He finds  the following quantities:

r = correlation between X and Y= 0.84

x = mean of the values of X = 5.69

y = mean of the values of Y = 6.26

S_x = standard deviation of the values of X = 3.23

s_y = standard deviation of the values of Y = 2.04

Using the formula for slope given above substitute to get

slope = 0.84*\frac{2.04}{3.23} \\=0.5305

round off to 0.53

Answer is option a ) 0.53

3 0
3 years ago
Suppose 6 pints of a 28% alcohol solution is mixed with 4 pints of a 90% alcohol solution. What is the concentration of alcohol
Lisa [10]

Answer:

52.8%

Step-by-step explanation:

The amount of alcohol is:

0.28 (6 pints) + 0.90 (4 pints) = 5.28 pints

So the concentration is:

5.28 pints / 10 pints × 100% = 52.8%.

6 0
3 years ago
If the spinner lands on green 10 times out of 60 spins,which statement true
IrinaVladis [17]

Answer:

  • The spinner lands on green 5 times less than expected

Step-by-step explanation:

Since not provided, it is assumed that the spinner has 4 colors.

Probability of green is one out of four = 1/4

<u>Probability of green out of 60 spins:</u>

  • 1/4*60 = 15 times

As spinner lands on green 10 times, then it is 5 times less than expected.

<u>Answer:</u>

  • The spinner lands on green 5 times less than expected
7 0
3 years ago
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