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3 years ago

Part-time weekly earnings ($) by college students.

Mathematics

1 answer:

alexira [117]3 years ago

5 0

Answer:

There is a significant linear correlation between the two variables.

Step-by-step explanation:

Given that part time weekly earnings are

x y

10 93

15 171

20 204

20 156

35 261

Correlation 0.9199

H0: r=correlatin =0

Ha: r ≠0

(two tailed test)

r difference = 0.9199

t = $r*\sqrt{(n-2)/(1-r^2)} \\=4.063$

p value < 0.0001

Since p <0.05 we reject null hypothesis

There is a significant linear correlation between the two variables.

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Simplify the expression below -3(10x + 4y) + 6(6x − 2y)

Sindrei [870]

You need to expand the brackets before you can simplify, so:
-3 × 10x = -30x
-3 × 4y = -12y

6 × 6x = 36x
6 × -2y = -12y

So now you have (-30x - 12y) + (36x - 12y)
-30x + 36x = 6x
-12y + -12y = -24y
So your answer is 6x - 24y. I hope this helps!

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4 years ago

If the area of the circle is 206.1 m², find the radius. Round your answer to the nearest

densk [106]

Answer:

D) 8.1 m

Step-by-step explanation:

Area of a circle is pi r^2

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3 years ago

Which of the following<br> represents 8!<br> A. 8<br> B. 8+7+6+5+4+3+2+1<br> C. 8*7*6*5*4*3*2*1

kakasveta [241]

Answer:

A is right answer. 8 represent is 8

Step-by-step explanation:

bye.

4 0

3 years ago

Please help me on this it’s due

olya-2409 [2.1K]

<h3>Answer: 5 cakes</h3>

================================================

Explanation:

Let's start off converting the mixed number 12 & 1/4 to an improper fraction.

$a \frac{b}{c} = \frac{a*c+b}{c}\\\\12 \frac{1}{4} = \frac{12*4+1}{4}\\\\12 \frac{1}{4} = \frac{49}{4}\\\\$

Do the same for the other mixed number 2 & 1/3.

$a \frac{b}{c} = \frac{a*c+b}{c}\\\\2 \frac{1}{3} = \frac{2*3+1}{3}\\\\2 \frac{1}{3} = \frac{7}{3}\\\\$

-----------------------

From here, we divide the two fractions. I converted them to improper fractions to make the division process easier.

$\frac{49}{4} \div \frac{7}{3} = \frac{49}{4} \times \frac{3}{7}\\\\\frac{49}{4} \div \frac{7}{3} = \frac{49\times 3}{4\times 7}\\\\\frac{49}{4} \div \frac{7}{3} = \frac{7\times 7\times 3}{4\times 7}\\\\\frac{49}{4} \div \frac{7}{3} = \frac{7\times 3}{4}\\\\\frac{49}{4} \div \frac{7}{3} = \frac{21}{4}\\\\$