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Nataly [62]
3 years ago
6

How do you find the y-intercept(b) from the graph? It doesn’t show all values.

Mathematics
1 answer:
Umnica [9.8K]3 years ago
5 0

Answer:

the answer is 42.

Step-by-step explanation:

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What is the total cost of a $12.49 item with a sales tax of 5%?
Ivan

Answer: $13.11

Step-by-step explanation:

hope this helps!

4 0
3 years ago
Convert 123 cm to dam
kondaur [170]
123 centimeters into dekameters
0.123
10 centimeters = 1 decimeter
100 decimeters = 1 dekameter
Therefore, 100 centimeters = 10 decimeters = 0.1
23 centimeters = 2.3 decimeters = 0.023
0.1 + 0.023 = 0.123 dam
8 0
3 years ago
4.22 x 1o^6 + 2.25 x 10^5 + 2.8 x 10^6
denpristay [2]
7245000...hope that helps
8 0
3 years ago
A true/false test has 40 questions. Suppose a passing grade is 30 or more correct answers. Test the claim that a student knows m
Angelina_Jolie [31]

Answer:

z≈3.16

p≈0.001

we reject the null hypothesis and conclude that the student knows more than half of the answers and is not just guessing in 0.05 significance level.

Step-by-step explanation:

As a result of step 2, we can assume normal distribution for the null hypothesis

<em>step 3:</em>

z statistic is computed as follows:

z=\frac{X-M}{\frac{\sqrt{p*(1-p)} }{\sqrt{N} } } where

  • X is the proportion of correct answers in the test (\frac{30}{40})
  • M is the expected proportion of correct answers according to the null hypothesis (0.5)
  • p is the probability of correct answer (0.5)
  • N is the total number of questions in the test (40)

z=\frac{0.75-0.50}{\frac{\sqrt{0.5*(0.5)} }{\sqrt{40} } } ≈ 3.16

And corresponding p value for the z-statistic is p≈0.001.

Since p<0.05, we reject the null hypothesis and conclude that the student knows more than half of the answers and is not just guessing in 0.05 significance level.

7 0
3 years ago
Doris says 0 is not a rational number is she correct?
Sedaia [141]
As far as I know 0 IS a rational number. The only ones that are not rational are negative numbers. :) Though I could be wrong.....
7 0
3 years ago
Read 2 more answers
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