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Pani-rosa [81]
3 years ago
12

1. Which system of equations has no solutions?

Mathematics
1 answer:
nevsk [136]3 years ago
4 0

Answer:

C.

Step-by-step explanation:

-a + b = -2

b = a + 3

-a + a + 3 = -2

3 = -2 (incorrect).....no solutions.....because these lines are parallel

You might be interested in
/viewform?hr submission=Chclk4feKBIQ.
Gennadij [26K]

Answer:

c) .22

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this question:

\sigma = 2.5, n = 500

Then

M = z*\frac{\sigma}{\sqrt{n}}

M = 1.96*\frac{2.5}{\sqrt{500}}

M = 0.22

5 0
3 years ago
Race car driver Mario won 3 races and earn 75 points for each win. During the fourth race, he had dedications of 55 points, 104
svet-max [94.6K]

Answer:

he has 472 points now.

Step-by-step explanation:

5 0
3 years ago
Which phrase best describes the translation from the graph y = (x + 2)2 to the graph of y = x2 + 3?
Mashutka [201]

1. Consider the transformation that maps the graph of the function y=(x+2)^2 into the graph of the function y=x^2. This transmormation has a rule:

(x,y)→(x+2,y)

that is translation 2 units to the right.

2. Consider the transformation that maps the graph of the function y=x^2 into the graph of the function y=x^2+3. This transformation has a rule:

(x,y)→(x,y+3)

that is translation 3 units up.

Answer: correct choice is C.

7 0
3 years ago
Read 2 more answers
What is 7/200 as a decimal
Hitman42 [59]
(7 / 2 ) / 100 

3.5 / 100 

0.035 

So your answer is 0.035
8 0
3 years ago
What is the value of x? Enter your answer in the box. <br><br> x= ___cm
gogolik [260]

Answer:

x=5

Step-by-step explanation:

40/x=32/4

160=32x

160/32=32x/32

5=x


Hope this helps sweetie! ;)

3 0
4 years ago
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