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4 years ago

Using pemdas please

Mathematics

2 answers:

LiRa [457]4 years ago

4 0

Answer:

13.5

Step-by-step explanation:

4+81/6-4

=4+13.5-4

=17.5-4

=13.5

crimeas [40]4 years ago

4 0

Step-by-step explanation:

Go in order from top to bottom if there is not one of the letters /steps in your problem skip it and move on to the next letter/ step

P- parentheses, (...)

E- Exponents, the 2 over the 9 is an exponent

M- Multiple, X

D- Divide, ÷

A- Add, +

S- Subtract, -

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The local public transport authority is conducting research into commuter behaviour. A previous census indicated that the mean c

kondor19780726 [428]

Answer:

$H_0:\mu = 45$ and $H_a:\mu < 45$

$T = 34.88$

The null hypothesis is not rejected

Step-by-step explanation:

Given

Random sample of 50 commuter times

Solving (a): The null and alternate hypothesis

From the question, a previous census shows that:

$\mu =45$ and $\sigma= 9.1$

This is the null hypothesis i.e.

$H_0:\mu = 45$

Reading further, a new test was to show whether the average has decreased.

This is the alternate hypothesis, and it is represented as:

$H_a:\mu < 45$

Solving (b) and (c): The test statistic (T).

This is calculated using:

$T = \frac{\mu}{\sigma/\sqrt n}$

In this case:

$n = 50$ $\mu =45$ and $\sigma= 9.1$

So:

$T = \frac{45}{9.1/\sqrt{50}}$

$T = \frac{45}{9.1/7.07}$

$T = \frac{45}{1.29}$

$T = 34.88$

Solving (c): Accept or reject null hypothesis

$\alpha = 0.05$

First calculate the degrees of freedom (df)

$df = n - 1 = 50 - 1$

$d f = 49$

From the t distribution table,

At: $d f = 49$ , $\alpha = 0.05$ and $T = 34.88$

the t score is:

$p = 1.676$

$p > 0.05$

<em>So, the null hypothesis is not rejected</em>

7 0

3 years ago

Gabrielle is 12 years younger than mikhail. the sum of their ages is 48. what is mikhail’s age?

KATRIN_1 [288]

Answer:

Mikhail is 36

Step-by-step explanation:

Take 48 and Subtract 12. That is your answer.

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-1, maybe or maybe not this is my first time doing this

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3 years ago

If Sandy's cookie recipe calls for 1/3 cup of brown sugar and she increases it to 2/9, how much brown sugar does she use?

expeople1 [14]

If you divide 9/2 you receive 4.5. Tho when you divide 1/3 you get .33333 (repeated), so now you know that both the fractions do not correlate. Now the 'multiples' of 1/3 are 2/ 6, 3/9, 4/12, 5/15, 6/18, 7/21 and so on. If you do the 'multiples' of 2/9 you get 4/18, 6/27. The common factors are 4/18 and 6/18. So know you know that Sandy is using 2/18 (or 1/9) cups more of sugar.

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3 years ago

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Round 681,858 to the nearest hundred thousand

jeka94

Answer:

700,000

Step-by-step explanation:

So really, in this question, all you care about is the 10,000ths place

The 10,000ths place in this number is 8. Since 8 is greater that four, round up to 700,000

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3 years ago

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