MATHEMATICS MIDDLE SCHOOL

the price of a visit to the dentist is calculated according to the formula 50+100n where n is the number of cavities the dentist finds on your last visit to the dentist 2 cavities were found

Answers

Answer 1
Answer: The cost would be $250
Answer 2
Answer: You would plug the 2 into the place of the n. 50+100(2). the answer is 250.

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What was the average speed in km/h of a boat that moves 15.0 km across a lake in 45 min

Answers

Answer:

20 km/h

Step-by-step explanation:

MIDDLE SCHOOL

Find the area of the rectangle 5 1/4 cm and 2 5/6 cm​

Answers

Answer:

Step-by-step explanation:

Your have to turn to an improper fraction so it will be  

Then turn to an improper fraction so it will be

Now multiply ×=

MIDDLE SCHOOL

What is the value for f(x) = 42x - 100 when x= 2 ?

Answers

When replace x with 2 in the equation, you get -16

First thing you would do is rewrite the equation substituting x for 2. After that, you would multiply 42 by 2, which would give you 84. From then on, you would subtract 100 from 84, which means the answer would equal -16, therefore f(2) = 42(2)-100= -16

f(2)=42(2)-100

f(2)=84-100

f(2)=-16

Hope this helps! Have a great day! :)

MIDDLE SCHOOL

Help Please! (: Morgan and Leigh spend a certain amount of money from their money box each month to buy plants.

The table shows the relationship between the amount of money (y) remaining in Morgan's money box and the number of months (x):

Function 1
Number of Months (x) Amount Remaining (in $) (y)
1(x) 50(y)
2(x) 40(y)
3(x) 30(y)
4(x) 20(y)

The equation shows the relationship between the amount of money (y) remaining in Leigh’s money box and the number of months (x):

Function 2:
y = −9x + 60

Which statement explains which function shows a greater rate of change?

Function 1 shows a greater rate of change, because Morgan spends $10 each month and Leigh spends $9 each month.

Function 1 shows a greater rate of change, because Morgan spends $10 each month and Leigh spends $60 each month.

Function 2 shows a greater rate of change, because Morgan spends $10 each month and Leigh spends $60 each month.

Function 2 shows a greater rate of change, because Morgan spends $50 each month and Leigh spends −$9 each month.

Correct Answer with shown work will get brainliest (:

Answers

Answer:

Option A.

Step-by-step explanation:

If a line passes through two points and , then the rate of change is

From the given table it is clear that the Function 1 passes through the points (1,50) and (2,40). So, the rate of change of Function 1 is

Negative sign represents the money spent by Morgan.

The rate of change of Function 1 is -10. It means, Morgan spends $10 each month.

Slope intercept form of a function is

       .... (1)

where, m is slope and b is y-intercept.

The Function 2 is

       .... (2)

On comparing (1) and (2) we get

The rate of change of Function 2 is -9. It means, Leigh spends $9 each month.

Function 1 is decreasing at the rate of 10 and Function 2 is decreasing at the rate of 9. So, the Function 1 shows a greater rate of change.

Therefore, the correct option is A.

Answer:

Function 1 shows a greater rate of change, because Morgan spends $10 each month and Leigh spends $9 each month.

Step-by-step explanation:

The rate of change for function 1 is found using the formula for slope:

Using our points, we have

(40-50)/(2-1) = -10/1 = -10

The rate of change for function 2 is what our variable x is multiplied by; in this case, it is -9.

The rate of change in function 1 is greater because Morgan spends $10 each month while Leigh spends $9 each month.

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