If f(x) varies directly with x and f(x) = 2 when x = 10, then what is the value of f(x) when x = 40?a.8
b.45
c.200
d.320

Answers

Answer 1
Answer:

Answer: a.8

Step-by-step explanation:

Given : If f(x) varies directly with x and f(x) = 2 when x = 10

We know  if two quantities (x and f(x)) are directly proportional then

(x_1)/(f(x_1))=(x_2)/(f(x_2))

Now, for the given problem we have ,

(10)/(2)=(40)/(f(40))\n\n\Rightarrow\ f(40)=(40*2)/(10)\n\n\Rightarrow\ f(40)=8

Hence, if  x = 40, then f(x)=8.

Answer 2
Answer: this is simple multiplication
do 2*4 and 10*4
so you get f(x)=8 and x=40

if you wanna do it by doing division do
2=10
f(x)=40
cross multiply then divide
so do 2*40 to get 80
then do 80/10 to get 8

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Can you help me please i don't understand

Answers

Answer:

Step-by-step explanation:

i think its 15

What are combinations of numbers and operations.

Answers

Complex numbers or Numerical Expressions. Maybe

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Sarah described the following situation:When fertilizer was added to one plant and nothing was added to another plant, there was a noticeable difference in the color of the leaves of the plants.

Which of the following best describes the situation?

A. This is an example of correlation but not causation.

B. This is an example of causation but not correlation.

C. This is an example of both correlation and causation.

D. This is an example of neither correlation nor causation.

Answers

When Sarah added the fertilizer and there was a noticeable difference, we can say that:

  • B. This is an example of causation but not correlation.

What is Causation?

Causation occurs when an effect is noticed because of a traceable item. The traceable item, in this case, is the fertilizer.

So when the fertilizer was added and a change in color was noticed, we can deduce that the difference was because of the fertilizer.

Therefore, option B is correct.

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Answer: B.) This is an example of causation but not correlation.

Step-by-step explanation: Causation is a cause and effect, because fertilizer was added to one plant, it's leaf color was improved.

Tomika plans to run 84miles in 4weeks.If she continues the pattern how many miles will she run in a year

Answers

Answer:

She will run a distance of 1095.78 miles per year.

Explanation:

 Number of days in a year = 365.25

 Number of days in a week = 7

 Number of weeks in a year = 365.25/7 = 52.18 weeks.

 Tomika plans to run 84 miles in 4 weeks.

 Distance run by Tomika in 1 week = 84/4 = 21 miles.

 Distance run by Tomika in 1 year = 21*52.18 = 1095.78 miles

 So she will run a distance of 1095.78 miles per year.

If Tomika continues the pattern, she will run approximately 1,092 miles in a year.

How to get the miles ran

There are 52 weeks in a year, so you can divide 52 by 4 to find out how many 4-week periods there are in a year:

Number of 4-week periods in a year = 52 weeks / 4 weeks/period = 13 periods

Now, multiply the miles she runs in each 4-week period (84 miles) by the number of 4-week periods in a year (13 periods):

Total miles in a year = 84 miles/period × 13 periods

Total miles in a year = 1,092 miles

So, if Tomika continues the pattern, she will run approximately 1,092 miles in a year.

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Round the following numbers tothe nearest five million.
22 500 000
27 500 000
67 490 000

Answers

Answer:

22,500,000 ⇒ 20,000,000

27,500,000 ⇒ 30,000,000

67,490,000 ⇒ 65,000,000

What is the value of the expression below when x
6 and y = 10?
10x - 5y

Answers

Answer: 10

Step-by-step explanation: Because 10times X when X=6 is 60 then 5 times Y when Y=10 makes it 50 then subtract the two numbers

60-50=10

Final answer:

The value of the expression 10x - 5y when x = 6 and y = 10 is 10.

Explanation:

The expression given is 10x - 5y. We are asked to determine the value of this expression when x = 6 and y = 10. To do this, we replace x and y in the expression with these given values:

10*6 - 5*10 = 60 - 50 = 10

So, when x = 6 and y = 10, the value of the expression 10x - 5y is 10.

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