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MA_775_DIABLO [31]
3 years ago
9

Given f(x)=2x^2+9x+k, and the remainder when f(x) is divided x+7 is 32, then what is the value of k?

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
6 0

Set up either long division or synthetic div.  I'd do the latter.

Your divisor for synth. div. should be -7.

                           __________  
Then              -7 /  2      9      k
                                    -14   +35
                          --------------------
                             2      -5      k+35                 Rem is 32; 
                                                                     Let 32 = k + 5 and solve for k:

                                                                           k = -3.

Let's check that.  Is k correct?

Then              -7 /  2      9      -3
                                    -14   +35
                          --------------------
                             2      -5      -3+35  = 32

Since the rem is 32, we are correct; k = -3.  
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3 years ago
Determine what type of model best fits the given situation: An Internet phone company presently provides service to 5,000 custom
ankoles [38]

The option c is correct. The linear representation model is best for this situation out of the exponential, quadratic model.

According to the statement

we have given that:

Monthly Rate = $20, Number of customers = 5000

If there is a decrease of $1 in the monthly rate, the number of customers increase by 500.

And we have to find that The type of model that best fits the given situation.

So, according to the linear representation model

Monthly Rate = $20, Number of customers = 5000

Let us decrease the monthly rate by $1.

Monthly Rate = $20 - $1  = $19, Number of customers = 5000 + 500 = 5500

Let us decrease the monthly rate by $1 more.

Monthly Rate = $19 - $1  = $18, Number of customers = 5500 + 500 = 6000

Here, we can see that there is a linear change in the number of customers whenever there is decrease in the monthly rate.

We have 2 pair of values here,

x = 20, y = 5000

x = 19, y = 5500

Let us write the equation in slope intercept form:

y = mx + c

And Slope of a function is

m = y₂ - y₁ / x₂ - x₁

Then

m = 5500 - 5000 / 19 - 20

m = -500

So, the equation become

y = -500x +c

And find the value of by putting the values.

So, c = 15000

And the equation become

y = -500x + 15000.

According to this linear model is perfect for this situation.

So, The linear representation model is best for this situation.

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7 0
1 year ago
What is the lateral area of the cone to the nearest whole number? The figure is not drawn to scale. Helppp which one is it
dezoksy [38]

It would be 49,009 because LA of a cone is height (50) times the radius (120) and that equals about 49,009.

6 0
4 years ago
Solve the inequality 4y + 3 > 24 + 14.
Degger [83]
Hi there!

Solving th' Inequality :-

4y + 3 > 24 + 14

=> 4y + 3 > 38

=> 4y > 38 - 3

=> 4y > 35

=> y > \dfrac {35}{4}

=> y > 8.75

Therefore, all real number y which are greater than 8.75 are the solutions of th' given Inequality.

Hence,
Solution of the following Inequality is : ( 8.75, ∞ )

~ Hope it helps!
7 0
3 years ago
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