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3 years ago

PLZ HELP! ASAP!!! I WILL GIVE BRAINLIEST

Mathematics

1 answer:

Ira Lisetskai [31]3 years ago

8 0

Answer:

see explanation

Step-by-step explanation:

Using cross- products, that is

$\frac{a}{b}$ = $\frac{c}{d}$ then ad = bc

Given the ratios

$\frac{4}{14}$ and $\frac{6}{21}$

Then equating and using cross- products

If both sides equate then the ratios are equivalent

$\frac{4}{14}$ = $\frac{6}{21}$ , then

4 × 21 = 6 × 14 ⇒ 84 = 84

Both sides are equal thus the ratios are equivalent

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3y + 2 + 2y + 5 =x + y + 2y – 4 =

aalyn [17]

Answer:

This is your answer ☺️. If I'm right so,

Please mark me as brainliest. thanks!!!

7 0

3 years ago

A coffee seller makes a salary of 3,500 dollars per month plus $12 commission for every $100 of coffee he sells. a case of coffe

Butoxors [25]

Answer:

Step-by-step explanation:

The total salary was $3650.

The base salary is $3500.

$3650 - $3500 = $150

He made $150 in commission.

He makes $12 commission for every $100 he sells.

$150/$12 = 12.5

He sold 12.5 amounts of $100.

Each $100 corresponds to 4 cases.

12.5 × 4 = 50

He sold 50 cases of coffee.

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3 years ago

An investment analyst takes a random sample of 100 aggressive equity funds and calculates the average beta as 1.7. The sample be

I am Lyosha [343]

Answer:

B) 1.622 to 1.778 includes the mean of the population beta.

Step-by-step explanation:

We have the standard deviation for the sample, so the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom,which is the sample size subtracted by 1. So

df = 100 - 1 = 99

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 99 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 1.9842

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 1.9842\frac{0.4}{\sqrt{100}} = 0.078$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 1.7 - 0.078 = 1.622.

The upper end of the interval is the sample mean added to M. So it is 1.7 + 0.078 = 1.778.

Thus the correct answer is given by option B.

8 0

3 years ago

Find the circumference of a circle whose diameter is 16 mm

Zarrin [17]

I hope this helps you

circumference =2pi.r

circumference =2.pi.16

circumference =32pi

6 0

4 years ago

Read 2 more answers

Which expression is a cubic polynomial? A. 3 x squared minus 1 B. x cubed minus 1 C. x squared minus x plus 3 D. 3 x squared min

SCORPION-xisa [38]

x^3-1

Step-by-step explanation:

because a cubic polynomial would have a cubic exponent to make it a cubic polynomial

4 0

3 years ago