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
rodikova [14]
3 years ago
6

I have this weird question that has to do with linear equations (I think), and this is what it says. Let f(x) = 4x - 5 A. Find f

(3) B. Find x when f(x) = -21 Can somebody help me understand this ? ?
Mathematics
1 answer:
hjlf3 years ago
7 0
f(3)=4\cdot3-5=12-5=7\\\\
4x-5=-21\\
4x=-16\\
x=-4
You might be interested in
Which of the following is an informal proof of the given conjecture? Conjecture: All squares are similar
tester [92]
The 3rd one because of the laws and newton’s ways
7 0
3 years ago
A number is chosen at random from 1-50. find the probability of selecting composite numbers
Ganezh [65]
.68 or a 68% chance
8 0
3 years ago
Read 2 more answers
Drag each volume of a prism to match a rectangular prism
Hunter-Best [27]

The volume of the rectangular prism with the dimensions given are as follows:

v = 72 inches³

v = 36 inches³

v =  80 inches³

v = 54 inches³

<h3>Volume of a rectangular prism</h3>
  • v = lwh

where

l = length

w = width

h = height

Therefore,

a.  

  • v = 4 × 3 × 6 = 72 inches³

b.

  • v = 6 × 3 × 2 = 36 inches³

c.

  • v = 4 × 5 × 4 = 80 inches³

d.

  • v = 2 × 9 × 3 = 54 inches³

learn more on rectangular prism here: brainly.com/question/13512346

4 0
1 year ago
A bag contains 42 cups of dog food. Your dog eats 2 1/3 cups of dog food 1 point
Strike441 [17]

Answer:

It will last 18 days.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Write the statement for the problem in mathematical language. Use x for the tens digit and y for the unit digits in the two digi
Nutka1998 [239]

Answer:

  18

Step-by-step explanation:

A two-digit number (xy) will have the value 10x+y. The sum of its digits is x+y.

You want ...

  10x +y = 2(x +y)

  1 ≤ x ≤ 9

  0 ≤ y ≤ 9

The equation can be simplified to ...

  8x = y

The only single-digit values for x and y that satisfy the requirements are ...

  x = 1, y = 8

The two-digit number of interest is 18.

_____

<em>Check</em>

Its sum of digits is 1+8 = 9. 2×9 = 18.

_____

<em>Comment on the relationship in the problem</em>

Many of us learned our multiplication tables for 9s by remembering that the sum of digits of 9n was 9, and that the leading digit of the product was n-1.

8 0
3 years ago
Other questions:
  • A culture started with 6,000 bacteria. After 3 hours, it grew to 7,200 bacteria. Predict how many bacteria will be present after
    9·1 answer
  • Help me out here and show work please
    13·1 answer
  • Solve (5w+1)(5-w)=0 <br> (If there is more than one solution, separate them with commas)
    10·2 answers
  • Okay here you go people help.
    10·2 answers
  • Learning Task 1: Write and answer the following in your answer sheet
    6·1 answer
  • PLZZZZZZZZZZZZ PLZZZZZZZZZZZZ PLZZZZZZZZZZZZ PLZZZZZZZZZZZZ help
    6·2 answers
  • this isn’t a question but i just wanted to tell everyone you all are doing great. this year has been hard and everyone is workin
    7·2 answers
  • Can u give me the answer ​
    13·1 answer
  • Hey Guys!
    11·2 answers
  • 6:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!