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Lelu [443]
3 years ago
15

Abe come is paying $400 a month to rent a house

Mathematics
1 answer:
tatyana61 [14]3 years ago
7 0
What? ......




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What are the zeros of the quadratic function f(x) = 2x2 + 8x – 3?
jenyasd209 [6]

Answer:

  x=-2-\sqrt{\dfrac{11}{2}}\ \text{and}\ x=-2+\sqrt{\dfrac{11}{2}}

Step-by-step explanation:

My favorite way to go at this is to look at a graph. It shows the vertex at (-2, -11). Since the leading coefficient is 2, this means the roots are ...

  -2\pm\sqrt{\dfrac{11}{2}}

where the 2 in the denominator of the radical is the leading coefficient.

__

You can also use other clues:

  • the axis of symmetry is -b/(2a) = -8/(2(2)) = -2, so answer choices C and D don't work
  • the single change in sign in the coefficients (+ + -) tells you there is one positive real root, so answer choice B doesn't work.

The first answer choice is the only one with values symmetrical about -2 and one of them positive.

__

You may be expected to use the quadratic formula:

  x=\dfrac{-b\pm\sqrt{b^-4ac}}{2a}=\dfrac{-8\pm\sqrt{8^2-4(2)(-3)}}{2(2)}\\\\=\dfrac{-8}{4}\pm\dfrac{\sqrt{88}}{4}=-2\pm\sqrt{\dfrac{11}{2}}

7 0
3 years ago
Describing the Vertical Line Test<br> Explain what the vertical line test is and how it is used.
Radda [10]

Answer:

Vertical line test is used to identify that the given graph is function or not

In this a vertical line is drawn at any part of the graph

If it cuts only one line then it is a function and it cuts more than one line then it is not a function

3 0
3 years ago
Read 2 more answers
Find the volume of the cylinder and cone, then add them together.
eduard

nao sei oque e desculpa tchau

5 0
3 years ago
You can walk 1 1/2 miles in 1/2 hour what is your average speed
evablogger [386]
Let’s turn the mixed number into a fraction
3/2 x 1/2
Multiply across
3/4
Hope this helps!
8 0
3 years ago
Read 2 more answers
I need help with geometry
Soloha48 [4]

Answer:

It 12

Step-by-step explanation:

This is because the scale factor between the triangles is 1.75, so I divide 21 by 1.75 and got 12

Hope this helped

4 0
3 years ago
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