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2 years ago

Distribute 5(2x-4y+8z)

Mathematics

1 answer:

Cloud [144]2 years ago

6 0

Answer: Hello! After being distributed, your answer should be 10x-20y+40z, hope this helps!

Step-by-step explanation: First multiply 5 and 2x and get 10x, then multiply 5 and 4y and get 20y, and lastly, multiply 5 an 8z and get 40z!

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Read the situations in the table below. Then drag a graph and equation to represent

Natali [406]

Answer:

Step-by-step explanation:

"Tamara runs 5 miles each week"

Let Tamara runs 'x' weeks then equation that represents the total distance covered by Tamara will be,

1). y = 5x

2). Here 'y' is directly proportional to the number of weeks 'x'.

3). And the graph when plotted will start from 0. Therefore, graph (1) will be the graph for the given equation.

"Tamara runs 5 minutes more than she walks each day."

1). If Tamara walks 'x' minutes daily and she runs for y minutes then relation between x and y will be,

y = x + 5

2). y and x are non proportional.

3). Graph will have y-intercept = 5

7 0

3 years ago

Results from previous studies showed 76% of all high school seniors from a certain city plan to attend college after graduation.

Degger [83]

Answer:

Yes, this indicate that the percentage has increased from that of previous studies.

Step-by-step explanation:

We are given that Results from previous studies showed 76% of all high school seniors from a certain city plan to attend college after graduation.

A random sample of 200 high school seniors from this city reveals that 162 plan to attend college.

Let p = % of all high school seniors from a certain city who plan to attend college after graduation

SO, Null Hypothesis, $H_0$ : p $\leq$ 76% {means that the percentage has not increased from that of previous studies}

Alternate Hypothesis, $H_a$ : p > 76% {means that the percentage has increased from that of previous studies}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of high school seniors from this city who

plan to attend college = $\frac{162}{200}$ = 0.81

n = sample of high school seniors = 200

So, test statistics = $\frac{0.81-0.76}{{\sqrt{\frac{0.81(1-0.81)}{200} } } } }$

= 1.8025

Now at 5% significance level, the z table gives critical value of 1.6449 for right-tailed test. Since our test statistics is more than the critical value of z so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region.

Therefore, we conclude that the percentage has increased from that of previous studies.

4 0

3 years ago

CANT seem to find the answer

melisa1 [442]

Answer:

A) Point C

B) Point E

Step-by-step explanation:

There are 3 vowels in the word square, and there are six total letters in the word square.

Square

There is a half chance of picking a letter that is a vowel in the word "square". (Three is half of six.)

Point C would be the most accurate spot for question 'a'.

The word square does not have a 'T'. It is certain that a letter that is not 'T' would be picked.

Point E would be the most accurate spot for question 'b'.

8 0

3 years ago

Read 2 more answers

If you dont give fake answers, next qeustion will be more points

aleksandr82 [10.1K]

Whats the question

?

6 0

3 years ago

Read 2 more answers

who walks at a faster rate: someone who walks 60 feet in 10 seconds or someone who takes 5 seconds to walk 25 feet?

Natasha2012 [34]

Answer:

Someone who walks 60 feet in 10 seconds

Step-by-step explanation:

It takes someone else 5 seconds to walk 25 feet.

25 feet x 2 is 50 feet.

5 seconds x 2 is 10 seconds.

That means that person is walking 50 feet per second, and 50<60.

I hope this helps!

4 0

3 years ago