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Leokris [45]
3 years ago
15

Given f (x)= 2x^2+3+5, find f (-1)

Mathematics
2 answers:
Bogdan [553]3 years ago
7 0
2(-1)^2+3+5

2(1)+3+5

5 + 5

answer: 10
xxMikexx [17]3 years ago
7 0

Answer:

f(-1) = 10

Step-by-step explanation:

f(x) = 2x² + 3 + 5

f(-1) = 2(-1)² + 8

= 2×1 + 8

= 2 + 8

= 10

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Worth 60 points
alex41 [277]

Answer:

Line y = -x + 2 intersects line y = 3x + 1

Step-by-step explanation:

The solution to a system of equations is the point at which the two lines intersect.  To find this point, first equate the equations and solve for x:

\begin{aligned}y & = y\\-x + 2 & = 3x + 1\\-x+2+x & = 3x+1+x\\2 & = 4x + 1\\2-1 & =4x+1-1\\1 &=4x\\x & =\dfrac14\end{aligned}

Substitute the found value of x into one of the equations, and solve for y:

y=3\left(\dfrac14\right)+1=\dfrac74

Therefore, the solution to the system of equations (the point at which the two lines intersect) is:

\left(\dfrac14,\dfrac74\right)

So the description that best describes the solution to the system of equations is:

Line y = -x + 2 intersects line y = 3x + 1

3 0
2 years ago
Which of the following is NOT a solution of the inequality?
Llana [10]

Answer: d) 0

Step-by-step explanation:

     With the inequality given, y ≤ -1, solutions are -1 and all numbers less than -1. We will check all the options to see which is not a solution.

     a) -3 ✓

           -> This is not our answer. -3 is less than -1.

     b) -1 ✓

           -> This is not our answer. -1 is equal to -1.

     c) -6 ✓

           -> This is not our answer. -6 is less than -1.

     d) 0 ✗

           -> This is our answer! 0 is not less than -1.

3 0
2 years ago
Read 2 more answers
Find the slope and y-intercept of equation y= 10x + 18
pickupchik [31]

Answer:

slope is 10

y-intercept is 18

Step-by-step explanation:

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3 years ago
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The dance committee consisted of 8 students. The committee will select three officers at random. What is the probability that Ma
Sophie [7]
3/24
I’m guessing cause you times 3 by 8 to get 24 which is the amount of possibilities
3 0
3 years ago
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