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
sasho [114]
3 years ago
6

Given that f(x) = 2x − 5, find the value of x that makes f(x) = 15.

Mathematics
1 answer:
nexus9112 [7]3 years ago
8 0
2x-5=15
2x=20
x=10
the answer is B
You might be interested in
20. The H.M. between 2 and 8 is<br>(1 marks )​
e-lub [12.9K]

Answer as an improper fraction = 16/5

Answer as a mixed number = 3 & 1/5

Answer in decimal form = 3.2

All of those values represent the same thing, but written in a different way.

=============================================================

Explanation:

I'm assuming HM stands for Harmonic Mean in this case.

If so, then we apply the reciprocal operation to each value to get 1/2 and 1/8 (from 2 and 8 respectively).

Add up those fractions:

1/2 + 1/8 = 4/8 + 1/8 = 5/8

Now we'll divide n = 2 over that result. The n = 2 refers to the number of items in the original set.

n divide over (5/8) = 2*(8/5) = 16/5 which is the answer as an improper fraction

-----------

To convert to a mixed number, we can do the following:

16/5 = (15+1)/5

16/5 = 15/5 + 1/5

16/5 = 3 + 1/5

16/5 = 3 & 1/5

Or if you need the answer in decimal form, then using a calculator would get you 16/5 = 3.2

6 0
3 years ago
What is the value of this expression when a=4, b=-5, and c=-7?
nasty-shy [4]

Answer: C. 6 1/6

Step-by-step explanation:

2 * -5 * -7 = -10 * -7 = 70

70 + 4 = 74

3 * 4 = 12

74/12 = 6 1/6

4 0
3 years ago
Factor the expression completely:<br> x⁴ + 27x
il63 [147K]
I dont know if this is right but here u goo

7 0
3 years ago
Read 2 more answers
Which exponential function goes through the points (1, 8) and (4, 64)?
Mama L [17]
An exponential function can be expressed as:

y=ab^x  we have two points so we can solve

64/8=(ab^4)/(ab^1)

8=b^3

2=b, now we have:

y=a(2^x), using point (4,64)

64=a(2^4)

64=16a

4=a so

y=4(2^x)
6 0
3 years ago
HELP ME PLEASE WITH THIS QUESTION!!!!!!!!!!!
allochka39001 [22]
I think you have to divide
7 0
4 years ago
Other questions:
  • Chart in last question ​
    12·2 answers
  • What is a=h(b+c) (solve for b)
    14·1 answer
  • Twice the first number is eleven more than the sum of the other two numbers. The sum of twice the first number and three times t
    14·1 answer
  • A battery was charged. When the changing began, it was 23 percent full. After 30 minutes of charging, the battery was 89 percent
    10·1 answer
  • What is the surface area?
    10·2 answers
  • 3y=12x+6 in slope-intercept form
    9·1 answer
  • The length of a rectangle is 4cm longer than the width, and the perimeter is at least 48cm. What are the smallest possible dimen
    13·1 answer
  • Solve each inequality. Then graph the solution.
    8·2 answers
  • Solve the inequality for x. -13 &gt; 3x-7 Simplify your answer as much as possible. . D&lt; DD&gt;D OSD D2D 8 х a​
    8·1 answer
  • The triangles are congruent by SSS or HL.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!