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
Novosadov [1.4K]
3 years ago
6

What is the value of Negative 9 r minus 7 when r = 2? -25 -18 11 45

Mathematics
1 answer:
andrezito [222]3 years ago
8 0

Answer:

11

Step-by-step explanation:please mark brainliest

You might be interested in
One x-intercept of the graph of the of the cubic function f(x) = x^3 – 2x^2 – 111x – 108 is –9.
katrin2010 [14]

Answer:

The zeros of the given function are -9,-1 and 12.

Step-by-step explanation:

The given function is

f(x)=x^3-2x^2-111x-108

It is given that the x-intercept of the graph is -9, therefore -9 is a zero of the function.

Since -9 is the zero of the function, therefore (x+9) is a factor of f(x). Use synthetics method or long division method to divide the function by (x+9).

f(x)=(x+9)(x^2-11x-12)=0

f(x)=(x+9)(x^2-12x+x-12)=0

f(x)=(x+9)(x(x-12)+(x-12))=0

f(x)=(x+9)(x-12)(x+1)=0

Use zero product property and quote each factor equal to 0.

x=-9,-1,12

Therefore zeros of the given function are -9,-1 and 12.

3 0
3 years ago
Dominic earns $18 an hour plus $25 an hour for every hour of overtime. Overtime hours are any hours more than 35 hours for the w
alexgriva [62]
Part A: (no overtime) E = 18x. Please note that x cannot exceed 35, thus E cannot exceed $630.

Part B: T = 25y + 18x where x = 35 hours. Thus, T = 25y + 630.

Part C: T = $730. 730 = 630 + 25y. Subtract 630 from both sides. 100 = 25y. Divide both sides by 25. y = 4. This is the number of overtime hours -- remember that Dominic has already worked 35 hours non-overtime. 35 + 4 = $730.
6 0
3 years ago
2x2 − 1 = 3x + 4 Which equation correctly applies the quadratic formula?
NNADVOKAT [17]

Standard form: ax^2 + bx + c = y

Steps to simplify:

2x^2 - 1 = 3x + 4

~Subtract (3x + 4) to both sides

2x^2 - 1 - 3x + 4 = 3x + 4 - 3x + 4

~Simplify

2x^2 - 3x - 5 = 0

(a = 2, b = -3, c = -5)

Now that we know what these values are, we can use the quadratic formula to solve.

x=\frac{-b-+\sqrt{b^2-4ac} }{2a} \\x = \frac{-(-3)-+\sqrt{-3^2-4(2)(-5)} }{2(2)}\\x= \frac{-3-+\sqrt{49} }{4} \\x=\frac{3-+7}{4} \\x = \frac{10}{4}~or~\frac{-4}{4}  \\x=\frac{5}{2}~or~-1

Answer: x = 5/2 or x = -1

Best of Luck!

5 0
3 years ago
A restaurant serves you a 16- fluid ounces glass of juice that is 30% ice. How many fluid ounces of juice do you actually get
Bas_tet [7]
30 percent of 16 is 4.8 so you actually get 4.8 fluid ounces of juice
6 0
3 years ago
The area of a circle is 9π <br> if and only if, its radius is 3.<br> true or false
lukranit [14]
True :) hope this helps
3 0
3 years ago
Other questions:
  • Simplify the following expression pleasee
    7·2 answers
  • !!!ASAP!!!Bisect angle rqp
    11·1 answer
  • 702 miles - 150 miles
    12·2 answers
  • Hey can you please help me posted picture of question
    6·2 answers
  • Tessa had $35. She bought a book for $7 and a magazine for $5. Which expression correctly shows the total money Tessa has left?
    7·1 answer
  • I need help on this mathematical equation B is the Midpoint of AC.
    6·2 answers
  • The standard unit for measuring mass is the
    14·1 answer
  • What is 60,000,000,000+800.000,000,000=?
    8·2 answers
  • Peyton is going to invest $440 and leave it in an account for 5 years. Assuming the
    13·1 answer
  • Hey y’all should follow it
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!