1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zolol [24]
2 years ago
10

What number makes the expressions equivalent?

Mathematics
1 answer:
Gelneren [198K]2 years ago
5 0

Answer:

b

Step-by-step explanation:

You might be interested in
Two 5-year girls, Alyse and Jocelyn, have been training to run a 1-mile race. Alyse's 1 mile time A is approximately Normally di
tatyana61 [14]

Answer:

1.7 × 10⁻⁴

Step-by-step explanation:

The question relates to a two sample z-test for the comparison between the means of the two samples  

The null hypothesis is H₀:  μ₁ ≤ μ₂

The alternative hypothesis is Hₐ: μ₁ > μ₂

z=\dfrac{(\bar{x}_1-\bar{x}_2)-(\mu_{1}-\mu _{2} )}{\sqrt{\dfrac{\sigma_{1}^{2} }{n_{1}}-\dfrac{\sigma _{2}^{2}}{n_{2}}}}

Where;

\bar {x}_1 = 13.5

\bar {x}_2 = 12

σ₁ = 2.5

σ₂ = 1.5

We set our α level at 0.05

Therefore, our critical z = ± 1.96

For n₁ = n₂ = 23, we have;

z=\dfrac{(13.5-12)-(0)}{\sqrt{\dfrac{2.5^{2} }{23}-\dfrac{1.5^{2}}{23}}} = 3.5969

We reject the null hypothesis at α = 0.05, as our z-value, 3.5969 is larger than the critical z, 1.96 or mathematically, since 3.5969 > 1.96

Therefore, there is enough statistical evidence to suggest that Alyse time is larger than Jocelyn in a 1 mile race on a randomly select day and the probability that Alyse has a larger time than Jocelyn is 0.99983

Therefore;

The probability that Alyse has a smaller time than Jocelyn is 1 - 0.99983 = 0.00017 = 1.7 × 10⁻⁴.

8 0
3 years ago
Need Help with these problems can so,e some explain and give me the answers.​
kotegsom [21]

Answer:

there you go all the answers

4 0
3 years ago
Need help on these problems plz its for a grade
irina [24]

Answer:

C. 390 Cubic units

5 * 6 * 13 = 390 cubic units

4 0
2 years ago
Read 2 more answers
Calculate the force when the pressure is 18 N/M squared and the area is 4 M squared.
Doss [256]
The force is 72 Newton
8 0
3 years ago
Which measure is a measure of center?
jok3333 [9.3K]
The Measures of Centrality are:
Mode, Median and Mean

From your list of answers therefore, it is the "mode".
6 0
3 years ago
Read 2 more answers
Other questions:
  • A roulette wheel has 38 slots total, 36 of which are numbered 1 through 36, and 2 green slots labeled "0" and "00." For any spin
    8·1 answer
  • The Leukemia and Lymphoma Society sponsors a 5K race to raise money. It receives $55 per race entry and $10,000 in donations, bu
    12·1 answer
  • How do you work out 9/10 divided by 6/7??
    13·1 answer
  • Rationalize the denominator of square root of negative 9 over open parentheses 4 minus 7 i close parentheses minus open parenthe
    15·1 answer
  • Can someone help me out with this question !!!
    6·1 answer
  • What is 60% of 80 ??​
    9·2 answers
  • Answer the 2 questions.
    10·1 answer
  • Write an equation of the line that passes through the given points.
    14·1 answer
  • How much 60% sugar syrup should be mixed with 4 gallons of water to obtain 20% syrup?<br><br> QUICK
    10·1 answer
  • 5. If I multiply a number by 3 and then subtract 4, the result is the same as twice the number. Find this number. ​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!