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2 years ago

What are the zeros of the function? f(x)=x2+17x+72

1 answer:

4 0

In order to find zeroes of a function, we will probably want to use our quadratic formula.

-b±√b^2-4(a)(c)/2a

If we know our values, we can plug it in.

Our values:

A=1 (Since there is no number in front of x, it is an assumed 1)
B=17
C=72

Now, We can plug it into our formula.

BE SURE TO PUT PARENTHESIS AROUND ALL TERMS!

-(17)±√(17)^2-4(1)(72)/2(1)

Now we can type it into a calculator!

When we plug it into the formula. It gives us two real solutions (or zeroes) which are represented as:

-8 & -9.

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Can someone help me plz

melisa1 [442]

The answer is B,which is 454 to be exact

7 0

2 years ago

What is f(1) given f(x)=2|x|+3x

aksik [14]

F(x) = 2|x| + 3x

f(1) = 2|1| + 3(1)
f(1) = 2 + 3
f(1) = 5

3 0

2 years ago

For what value(s) of x does cos(x) = -1?

mixer [17]

Answer:

4. none of the above

Step-by-step explanation:

cos(x)=-1 is 180 where value x is.180

3 0

2 years ago

HELP ME PLEASE True or false: z=−5 is a solution to the inequality −2|z−3|<−20.

Dovator [93]

your question: 

True or false: z=−5 is a solution to the inequality −2|z−3|<−20.

answer: 

-2|z-3|<-20

-------. -----

-2 -2

|z-3|<10

equation 1: equation 2:

z-3<10. z-3>-10

z<13 z>-13

So false, z=-5 is not a solution to the inequality.

hope this helps, have a great day! :)

7 0

2 years ago

A radio arm saw has a circular cutting blade with a diameter of 10 inches and it spins at 2000rpm if there are 12 cutting teeth

FinnZ [79.3K]

Answer:

12565.11 teeth approximately cut cross the cutting surface per seconds.

Step-by-step explanation:

Since the diameter is 10inches, the circumference of the arm saw is 10π (circumference is πd where d is diameter).

The number of teeth on the cutting blade can be gotten by multiplying the diameter by 12 since we have 12 teeth per inch on the arm saw

Number of teeth on saw = 12 x 10π = 120π.

To get the number of teeth that cross the cutting surface in 2000rpm we multiple it by the total number of teeth in just one rpm.

So we have 2000 x 120π. But since we are asked to find it in revolution per seconds then 2000r/m = 2000r/60s ≈ 33.33

Therefore, we have

33.33 x 120π ≈ 12565.11 teeth

7 0

2 years ago

​ What are the zeros of the function?​ f(x)=x2+17x+72

What are the zeros of the function? f(x)=x2+17x+72