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3 years ago

How would you do this, I really struggled with this last year.

Mathematics

1 answer:

Deffense [45]3 years ago

5 0

If you're multiplying a whole number by a fraction, then multiply the whole number by the numerator, then divide that number by the denominator.

So in the case of 15 x (5/6), multiply the 15 by 5 (75) and then divide by 6 to get 75/6 (as an unsimplified answer).

In the case of 3 x (3/6), you again multiply the whole number by the numerator (3x3=9) and divide by the denominator (9/6) to get 9/6 or 3/2 when simplified.

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A city with a population of 700,000 has been growing at a rate of 2% per year. If this rate continues, what would the population

Mars2501 [29]

Answer:

450,900

Step-by-step explanation:

3 0

2 years ago

A gardener is planting two types of trees:

denpristay [2]

It takes 12 years for both trees to be of same height

Solution:

Assume the year that it would take to these trees have the same height is : x (years)

Type A is 7 feet tall and grows at a rate of 23 inches per year:

Convert 7 feet to inches

We know that,

1 foot = 12 inch

7 feet = 12 x 7 inch = 84 inch

Thus, type A is 84 inches tall and grows at a rate of 23 inches per year

We can frame a equation as:

Type A = 84 + 23(number of years)

Type A = 84 + 23x ---------- eqn 1

Type B is 5 feet tall and grows at a rate of 25 inches per year

Convert 5 feet to inches

5 feet = 5 x 12 inches = 60 inches

Thus, type B is 60 inches tall and grows at a rate of 25 inches per year

We can frame a equation as:

Type B = 60 + 25(number of years)

Type B = 60 + 25x --------- eqn 2

For both the trees to be of same height, eqn 1 must be equal to eqn 2

84 + 23x = 60 + 25x

25x - 23x = 84 - 60

2x = 24

x = 12

Thus it takes 12 years for both trees to be of same height

7 0

3 years ago

What do -2(3x-10y+8) equals

lesantik [10]

Answer:

= - 6 x + 20 y - 16

Step-by-step explanation:

step one . multiply the parenthesis by -2

step two . multiply whats left

step three . DONE

Hope this helped. I'd love for you to mark brainliest if you dont mind ❤️ Let me know if you need anything else.

6 0

3 years ago

Read 2 more answers

240 miles in 6 hours as a unit rate

Damm [24]

The unit rate of 240 miles in 6 hours would be 40 miles per hour.

3 0

3 years ago

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Which of the following is a benefit of increasing the sample size when trying to estimate the mean from a sample average?

andrezito [222]

Answer:

Step-by-step explanation:

The larger the sample size, the lower the standard deviation. The standard deviation shows how the data is spread from the mean. Therefore, benefit of increasing the sample size when trying to estimate the mean from a sample average are

a. A reduction in the bias of the estimate.

b. A reduction in the variability of the estimate.

The width of confidence interval is determined by the margin of error

Margin of error = z × s/√n

A smaller standard deviation and increased size would result to a narrower confidence interval. Therefore, increasing the sample size does not result to an increase in the width of the resulting confidence interval.

3 0

3 years ago