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Viktor [21]
1 year ago
11

Please help me with this math question

Mathematics
2 answers:
Arturiano [62]1 year ago
5 0

Answer:

145

Step-by-step explanation:

168-23 = 145

    i hope this helps :)

katen-ka-za [31]1 year ago
5 0

Answer:

145

Step-by-step explanation:

168-23 = 145

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George has 64 baseball cards. He gives 28 of them to his brother. Which method shows away to find 64 - 28?
dmitriy555 [2]

Answer:

i'm confused is it asking what 64-28 is

Step-by-step explanation:


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lorenzo has a checkbook balance of $118.00. he writes two checks, one for $ 9.00 and one for $84.25.He then deposits $95.00. fin
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$118.00 - $9.00 - $84.25 + $95.00 is the correct order
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write an addition equation. the equation must have a 1-, a2-, and a 3-digit added and use all of these digit. 662288000
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Employees from A and company B receive annual bonuses. What information would you need to test the claim that the difference in
lyudmila [28]

Answer:

1. The required information are

The average annual bonuses, \bar {x}_1 received by employees from company A

The average annual bonuses, \bar {x}_2 received by employees from company B

The standard deviation, σ₁, of the average annual bonuses for employees from company A

The standard deviation, σ₂, of the average annual bonuses for employees from company A

The number of employees in company A, n₁

The number of employees in company B, n₂

2. The null hypothesis is H₀: \bar {x}_1 - \bar {x}_2 ≤ 100

The alternative hypothesis is Hₐ: \bar {x}_1 - \bar {x}_2 > 100

Step-by-step explanation:

1. The required information are

The average annual bonuses, \bar {x}_1 received by employees from company A

The average annual bonuses, \bar {x}_2 received by employees from company B

The standard deviation, σ₁, of the average annual bonuses for employees from company A

The standard deviation, σ₂, of the average annual bonuses for employees from company A

The number of employees in company A, n₁

The number of employees in company B, n₂

2. The null hypothesis is H₀: \bar {x}_1 - \bar {x}_2 ≤ 100

The alternative hypothesis is Hₐ: \bar {x}_1 - \bar {x}_2 > 100

The z value for the hypothesis testing of the difference between two means is given as follows;

z=\dfrac{(\bar{x}_{1}-\bar{x}_{2})}{\sqrt{\frac{\sigma_{1}^{2} }{n_{1}}-\frac{\sigma _{2}^{2}}{n_{2}}}}

At 0.5 level of significance, the critical z_\alpha = ± 0

The rejection region is z > z_\alpha and z < -z_\alpha

Therefore, the value of z obtained from the relation above more than or less than 0, we reject the null hypothesis, and we fail to reject the alternative hypothesis.

7 0
3 years ago
A section of a boardwalk is made using 15 boards. Each board is 9 1/4 inches wide. The total width of the section is 144 inches.
svlad2 [7]
The space between each board is 15.56 144/9.25=15.56
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