1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andrew [12]
1 year ago
12

Evaluate the expression when x=-5 X^2 + 6x-9

Mathematics
1 answer:
d1i1m1o1n [39]1 year ago
5 0

The value of the function f(x) = x² + 6x - 9 when x = -5 is  -14.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

An independent variable is a variable that does not depends on other variable while a dependent variable is a variable that depends on other variable.

Given that:

f(x) = x² + 6x - 9

When x = -5:

f(-5) = (-5)² + 6(-5) - 9 = -14

The value of the function f(x) = x² + 6x - 9 when x = -5 is  -14.

Find out more on equation at: brainly.com/question/2972832

#SPJ1

You might be interested in
Jamie is riding a Ferris wheel that takes fifteen seconds for each complete revolution. The diameter of the wheel is 10 meters a
Agata [3.3K]

Answer:

The answers to the question is

(a) Jamie is gaining altitude at 1.676 m/s

(b) Jamie rising most rapidly at t = 15 s

At a rate of 2.094 m/s.

Step-by-step explanation:

(a) The time to make one complete revolution = period T = 15 seconds

Here will be required to develop the periodic motion equation thus

One complete revolution = 2π,

therefore the  we have T = 2π/k = 15

Therefore k = 2π/15

The diameter = radius of the wheel = (diameter of wheel)/2 = 5

also we note that the center of the wheel is 6 m above ground

We write our equation in the form

y = 5*sin(\frac{2*\pi*t}{15} )+6

When Jamie is 9 meters above the ground and rising we have

9 = 5*sin(\frac{2*\pi*t}{15} )+6 or 3/5 = sin(\frac{2*\pi*t}{15} ) = 0.6

which gives sin⁻¹(0.6) = 0.643 =\frac{2*\pi*t}{15}

from where t = 1.536 s

Therefore Jamie is gaining altitude at

\frac{dy}{dt} = 5*\frac{\pi *2}{15} *cos(\frac{2\pi t}{15}) = 1.676 m/s.

(b) Jamie is rising most rapidly when   the velocity curve is at the highest point, that is where the slope is zero

Therefore we differentiate the equation for the velocity again to get

\frac{d^2y}{dx^2} = -5*(\frac{\pi *2}{15} )^2*sin(\frac{2\pi t}{15}) =0, π, 2π

Therefore -sin(\frac{2\pi t}{15} ) = 0 whereby t = 0 or

\frac{2\pi t}{15} = π and t =  7.5 s, at 2·π t = 15 s

Plugging the value of t into the velocity equation we have

\frac{dy}{dt} = 5*\frac{\pi *2}{15} *cos(\frac{2\pi t}{15}) = - 2/3π m/s which is decreasing

so we try at t = 15 s and we have \frac{dy}{dt} = 5*\frac{\pi *2}{15} *cos(\frac{2\pi *15}{15}) = \frac{2}{3} \pim/s

Hence Jamie is rising most rapidly at t = 15 s

The maximum rate of Jamie's rise is 2/3π m/s or 2.094 m/s.

7 0
3 years ago
(PLS ANWSER FAST) Kyle has a storage box in the shape of a rectangular prism. the box has a square base with sides that are 3 ft
Dennis_Churaev [7]

V = length x width x height

In this problem:

length = 3

width = 3

height = 6

V = 3 x 3 x 6

V = 54 ft^3

Hope this helps!! :)

7 0
3 years ago
What is the answer to 1.5 / 2.5 equals 3.5 / d
Kay [80]

Answer:

1.5/2.5 = 3.5/5.83recuring

Step-by-step explanation:


8 0
3 years ago
Evaluate the following expressions if ×=2,y=3 and Z=4. a.4×+×-3over ×+10 b.2y-5yover y+5. c.yz-×. d.9+y+zover y+2​
sammy [17]

Answer:

A= 7 11/12 or 7.916 or  95.12

B= 4 1/8 or 4.125 or 33/8

C=  12 4/5 or 12.8 or 64/5

6 0
3 years ago
Pringles is planning their sales force spending for the next year. Each of their sales people spends about 3400 hours annually a
LUCKY_DIMON [66]

Answer:

459 sales people.

Step-by-step explanation

Time per call (t) = 45 min = 0.75 h

Hours per sales person (H) = 3,400 hours

Number of customers (n) = 40,000 customers

Call frequency (f)= 52 calls per year

The total number of sales people (S) needed, is given by the total time spent on calls for the year, divided by the amount of hours each person spends on sale:

S=\frac{40,000*0.75*52}{3,400}\\ S=458.8

Rounding up to the next whole person, Pringles needs 459 sales people.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which expression is not equivalent to 8 times x times 2 times y
    6·2 answers
  • A(3-x)=-2x+B if x=2 How do I find A and B what are the answers
    12·1 answer
  • Solving multi-step<br>1.2+1.25g=8.62<br>g=​
    12·1 answer
  • 25 percent of 500 is how much?
    6·2 answers
  • If ƒ(x) = 2x2 + 3, then which of the following represent ƒ(x + 1)?
    15·2 answers
  • How do you convert minutes to seconds
    6·2 answers
  • Which number has a factor of 3 and a factor of 19
    8·1 answer
  • 2000÷4 gets you what I don't know​
    11·2 answers
  • What’s the answer to this problem?
    11·1 answer
  • so i have this question that says I was at a grocery store and my total is 35.25 but I get to the register and find out it is 25
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!