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3 years ago

Do the rational numbers form a finite set?

Mathematics

1 answer:

zysi [14]3 years ago

6 0

Yea because the rationl numbers are diffrent form as a finite set

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In a school with 2,000 students, 250 are athletes. Of those athletes, 120 lift weights in addition to participating in their pri

raketka [301]

Answer:

Step-by-step explanation:

4 0

3 years ago

Consider the function represented by 9x+3y = 12 with x as the independent variable. How can this function be

Delicious77 [7]

Answer:

f(x) = -3x + 4

Step-by-step explanation:

Given function:

9x + 3y = 12

Putting this into slope-intercept form: y = mx + b

9x + 3y = 12
3y = -9x + 12
y = -3x + 4

Replacing y with f(x)

f(x) = -3x + 4

6 0

3 years ago

Grace and her brother Sid want to raise money to go to band camp. Their parents have agreed to help them earn up to $400 by payi

lukranit [14]

Answer:

25m + 10b = 400

Step-by-step explanation:

Total amount that can be earned = $ 400

Amount earned on mowing a lawn = $ 25

Amount earned per hour on babysitting = $10

Amount earned for mowing one lawn is $ 25, so amount earned for mowing m lawns will be $ 25m

Amount earned for one hour of babysitting is $ 10, so amount earned for babysitting for b hours will be $ 10b

Using the values from above, we can set up the equation as:

400 = 25m + 10b

25m + 10b = 400

This equation represents the number of lawns they can mow, m, and hours they can babysit, b, to earn $400.

Hope this helps have a good day

3 0

2 years ago

Solve a-d please i really dont understand

valkas [14]

So i think what you do is if you make a number line like this:

1...2...3...4...5...6...7...8

you have to find out how many numbers are in between 4 and 7, so I would be 3 because there are 3 numbers I between 4-7.

so

a) 3
b) 6
c) 14
d) 8

5 0

3 years ago

22. Use your model to determine when the volume of oil will get down to 500 gallons.

Helen [10]

Answer:

21. y = 75000·0.935^t

22. after 74.6 days

23. y = 27.8112·1.18832^t

24. 18.8% per month

25. 1748

Step-by-step explanation:

22. It is convenient to use the graphing calculator to solve this problem. The number of days is where the exponential curve has the value 500. It is about 74.55 days. (see the first attachment)

23. y = 27.8112·1.18832^t (see the second attachment)

24. The rate of change is the difference between the base of the exponential and 1, often expressed as a percentage. The time period is the units of t.

(1.18832 -1) × 100% ≈ 18.8% . . . . per month

25. Evaluating the function for t=24 gives y ≈ 1748.30425259 ≈ 1748.

_____

Comment on graphing calculator

A graphing calculator can make very short work of problems like these. It is worthwhile to get to know how to use one well.

8 0

3 years ago