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Illusion [34]
3 years ago
9

The average rate of change of f(x)=3x+9 is 9. true or false?

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
7 0
The rate of change is the slope.
f(x) is the same as y...
f(x) = 3x + 9.....y = 3x + 9....and in y = mx + b form, the rate of change(slope) can be found in the m position.

y = mx + b
y = 3x + 9....so the slope or rate of change is 3...not 9...so answer is false
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Read the problem in the box below. Make a list to help you find the correct
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Answer:

B

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4 0
3 years ago
In a group of 60 workers, the average (arithmetic mean) salary is $80 a day per worker. If some of the workers earn $75 a day an
Tomtit [17]
Let's let x = the number of workers making $75 per day
Then that would mean (60 - x) would be the number of workers who make $100 per day. 
Now the average salary, which needs to be 80, can be found by adding all the salaries of the 60 workers and dividing by 60.  The following equation can model this problem:
[75x + 100(60 - x)]/60 = 80  simplify the left side of the equation
(-25x + 6000)/60 = 80  multiply both sides by 60
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-25x = -1200  divide both sides by -25
x = 48  recall we set 'x' to equal the number of workers making $75 per day
And there you have it!  Hope this helps.. 

8 0
4 years ago
Read 2 more answers
I don't understand how to do this question, I need help<br><br> Find the value of x in each diagram
Korvikt [17]

Answer:

A. x = 8.

B. x = 31.

C. x = 32.

Step-by-step explanation:

Here. the sum of the 2 parallel sides of the trapezoid = 2 * length of the middle line segment.

MN + RS = 2PQ

32+ x = 2*20

x =  40 - 32

x = 8.

MN + RS = 2PQ

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2x =  62

x = 31

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5 0
3 years ago
Jacob has purchased a $129,000 home with a 30-year mortgage at 5.15%. He can make a monthly payment of $1000. If he were to make
Nookie1986 [14]

Answer: 188 months

Step-by-step explanation:

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Payment = $1000

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Since,

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Also,

rate = 5.15/1,200 = 0.004292

Number of Months = log (1 + [0.004292/(1,000/129000) -0.004292] / log(1+0.004292)

Number of Months = log ( 1 + 0.004292/ ((0.007752 -0.004292) / log (1.004292)

Number of Months = log ( 1 + (0.004292/0.00346))/ log (1.004292)

Number of Months = log (1 + 1.240) / log (1.004292)

Number of Months = log (2.240) / log (1.004292)

Number of Months = 0.3502 / 0.001860

Number of Months = 188.28 months

Approximation to whole month,

Number of months = 188 Months.

5 0
3 years ago
What is the algebraic expression for the product of 9 and a number t
musickatia [10]
9t
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6 0
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