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Paraphin [41]
2 years ago
13

Can someone help me with this?

Mathematics
2 answers:
faltersainse [42]2 years ago
7 0

Answer:

I think it's graph 2 hope that helps

Step2247 [10]2 years ago
6 0

Answer:

E. Graph E

Step-by-step explanation:

1: Find critical points of inequality.

  • One critical point is 0; we have to solve for the other.
  • \sqrt{x} = 2

Step 1: Square both sides.

  • x = 2^2
  • x = 4

Step 2: Check if solution is correct.

  • \sqrt{4} = 2
  • 2 = 2

2. Check the intervals between critical points.

  • x ≤ 0: doesn't work  
  • 0 ≤ x ≤ 4: does work
  • x ≥ 4: doesn't work

3. Now that we know the interval is 0 ≤ x ≤ 4, we look for the graph that matches this inequality.

  • Note: This inequality means that the values include 0, 4, and the values in between them
  • Given the information above, the correct answer is E because it includes 0, 4, and the numbers between.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

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Please help with math question
ELEN [110]

Answer:

y = 4x² -3x +5

Step-by-step explanation:

It can be helpful to plot the points on a graph. The curve through them opens upward, so you know <em>the first two answer choices are incorrect</em>.

<em>Looking at the location of the vertex</em>

The points (-1, 12) and (2, 15) have nearly the same y-value, so the vertex of the parabola will be nearly halfway between those points, at about ...

... x = (-1 +2)/2 = 1/2

Because the point at (2, 15) has a slightly higher y-value, you know it is farther from the vertex, so the vertex will be at an x-value that is less than 1/2.

For quadratic ...

... y = ax² +bx +c

the vertex is found at

... x = -b/(2a)

For the 3rd choice, this is x = -(-4)/(2·3) = 2/3. This is higher than 1/2, so we can eliminate this choice, too.

Only the 4th choice remains. (It passes the vertex location test: x = -(-3)/(2·4) = 3/8 < 1/2.)

_____

There are some other ways to solve this problem, too.

  1. try the given points in the given equations. The +5 as a constant of all of them tell you that all will work for x=0. Both of choices 3 and 4 work for x=-1, so we have to try x=2. Choice 3: 3·2² -4·2 +5 = 9, not 15. Choice 4: 4·2² -3·2 +5 = 15. So Choice 4 is the answer.
  2. write equations for a, b and solve them. a(-1)² +b(-1) +5=12; a(2)² +b(2)+5=15. or a-b=7, 2a+b=5 in standard form. Adding these gives 3a=12, so a=4 and Choice 4 is the answer.
  3. use a graphing calculator to write the quadratic regression formula from the three points. This result is shown in the attachment. The (a, b, c) = (4, -3, 5) correspond to Choice 4.

7 0
2 years ago
Which of the following equations have graphs that are parallel to the graph of the equation y=-3/2x+8?
AfilCa [17]
Parallel lines will have the same slope, but different y int
y = -3/2x + 8....slope = -3/2....y int = 8

(I) 3x + 2y = 10
    2y = -3x + 10
    y = -3/2x + 5....slope = -3/2, y int = 5....this IS parallel

(II) 2x - 3y = 9
     -3y = -2x + 9
     y = 2/3x - 3...slope = 2/3, y int = -3....is not parallel

(III) 6x + 4y = 28
       4y = -6x + 28
       y = -3/2x + 7...slope = -3/2, y int = 7....this IS parallel

(IV) 3x - 2y = 8
      -2y = -3x + 8
      y = 3/2x - 4...slope = 3/2...y int = -4...this is not parallel

solution is : I and III
6 0
2 years ago
Annie's parents have offered her two different allowance options for her 10 week summer vacationAnnie's mom offers Annie an allo
vfiekz [6]
<h3>Annie's mom's offer is better because Annie will have more money at the end of weeks.</h3>

HOPE IT HELPS

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5 0
2 years ago
Read 2 more answers
5(6.2+z) , z=3.8 help please :)
inna [77]

Answer:

the answer should be 50

Step-by-step explanation:


3 0
3 years ago
True or False: Surface area is the combined area for all of the surfaces of a 3D shape.
Lena [83]

Answer:

A.

Step-by-step explanation:

It's false

8 0
2 years ago
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