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
natita [175]
3 years ago
12

Find xif f(x) = 2x + 7 and f(x) = -1.

Mathematics
2 answers:
Natali [406]3 years ago
8 0

Answer: -4

Step-by-step explanation:

Solve 2x+7=-1

2x. =-8

x. =-4

nevsk [136]3 years ago
7 0

Answer:

-4

Step-by-step explanation:

To find the value you have to substitute x for -1. because f(x) = -1.

-2x + 7 = -1

-7= -7

-2x =-8

÷-2

x=-4

Hope it helps!

You might be interested in
A cone has a volume of 5 cubic inches. What is the volume of a cylinder that the cone fits exactly inside of?
Naya [18.7K]
<span>Volume of Cone: 1/3 Bh where B is the area of the base 1/3 Bh = 5 Bh = 15 B = 15/h The cylinder has the same base area as the cone. Volume of Cylinder: V = B*h B = V/h and B = 15/h The height of the cone and the cylinder are the same. V/h = 15/h Volume of Cylinder = 15.</span>
4 0
3 years ago
I don't know to find the answer to 8. Can someone explain to me?
lapo4ka [179]
Perhaps the easiest way to find the midpoint between two given points is to average their coordinates: add them up and divide by 2.

A) The midpoint C' of AB is
.. (A +B)/2 = ((0, 0) +(m, n))/2 = ((0 +m)/2, (0 +n)/2) = (m/2, n/2) = C'
The midpoint B' is
.. (A +C)/2 = ((0, 0) +(p, 0))/2 = (p/2, 0) = B'
The midpoint A' is
.. (B +C)/2 = ((m, n) +(p, 0))/2 = ((m+p)/2, n/2) = A'

B) The slope of the line between (x1, y1) and (x2, y2) is given by
.. slope = (y2 -y1)/(x2 -x1)
Using the values for A and A', we have
.. slope = (n/2 -0)/((m+p)/2 -0) = n/(m+p)

C) We know the line goes through A = (0, 0), so we can write the point-slope form of the equation for AA' as
.. y -0 = (n/(m+p))*(x -0)
.. y = n*x/(m+p)

D) To show the point lies on the line, we can substitute its coordinates for x and y and see if we get something that looks true.
.. (x, y) = ((m+p)/3, n/3)
Putting these into our equation, we have
.. n/3 = n*((m+p)/3)/(m+p)
The expression on the right has factors of (m+p) that cancel*, so we end up with
.. n/3 = n/3 . . . . . . . true for any n

_____
* The only constraint is that (m+p) ≠ 0. Since m and p are both in the first quadrant, their sum must be non-zero and this constraint is satisfied.

The purpose of the exercise is to show that all three medians of a triangle intersect in a single point.
7 0
3 years ago
Polygon LMNP slides 5 units right and 4 units down on the coordinate plane. If the original measure of angle M was 50 degrees, w
sergeinik [125]
Add them all together
3 0
3 years ago
Read 2 more answers
Write the following integers in a decreasing order. 1. 0,7,-3,9,-132,36​
Elan Coil [88]
ANSWER:
36 > 9 > 7 > 0 > -3 > -132

Hope it helps u!
6 0
3 years ago
Read 2 more answers
Adam writes 18y to simplify an expression with three like terms. What could the expression be?
frosja888 [35]

Answer:

Step-by-step explanation:

5y + 6y + 7y = 18y......any numbers that add(or subtract) to equal 18, stick them before the y....

or it could be : 10y + 10y - 2y = 18y or 5y + 10y + 3y or 30y - 20y + 8y....I could go on forever...lol

8 0
3 years ago
Other questions:
  • Christine used 12 cubes to make this 3-step staircase. If she uses a total of 56 cubes to make a similar staircase, how many ste
    5·2 answers
  • The function f(t) = 2.5t + 50 describes the total cost of ordering shirts, which includes the price per shirt and the one-time s
    7·1 answer
  •  A nickle is tossed and a dice rolls a 4. Considering that these are independent events, find the probability of getting a head
    14·1 answer
  • Please help what is for 1/2 x 1 2/3
    13·2 answers
  • Kirk had 33 points in the game before getting
    5·2 answers
  • Find the slope of the line that passes through M(-6, 2) and N(-4, -2)
    14·1 answer
  • Which description matches the graph of the inequality y &gt; -X - 3?
    7·1 answer
  • Reggie makes $37,500 per year. He will receive an 8% raise. What will be his new salary?
    12·1 answer
  • Given side lengths 4 units, 8 units, and x units, determine the range in which x must lie in order for a triangle to exist.
    10·1 answer
  • A car can be rented for ​$95 per week plus ​$0.20 per mile. How many miles can be driven if you have at most ​$370 to spend for
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!