The equation below describes a parabola. If a is positive, which way does the

Mathematics

2 answers:

Rzqust [24]1 year ago

8 0

B. Up

Because a positive ‘a’ value will make the parabola open upwards, and because the power is 2 (even) both sides will open up in a ‘U’ shape

natka813 [3]1 year ago

6 0

B. Up
Hope this helped :)

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What is the root?<br> <img src="https://tex.z-dn.net/?f=3-%20%5Csqrt%7Bx%7D%20%3D0%20" id="TexFormula1" title="3- \sqrt{x} =0 "

irga5000 [103]

To solve for x, add 3 to both sides, multiply both sides by -1, then take the square both sides.
$3- \sqrt{x} =0\\- \sqrt{x} =-3 \\ \sqrt{x} =3 \\ x=3^2=9$

4 0

2 years ago

What is the solution set of {x | x > -3} {x | x < 3}?

givi [52]

x > -3

x < 3

<em><u>-3 < x < 3</u></em>

question didn't mention about "x is real number, or positive, or negative etc".. so we can't say anything more

for example: x can be -2,-1,0,1,2

but if only positive, x can be = 1,2

" " negative, x can be = -1, -2

Hope this helps ^-^

7 0

2 years ago

Find an equation for the line that passes through the points (1, -1) and (-3, 1).

saul85 [17]

Answer:

Step-by-step explanation:

Equation of line is y = mx + c

where m is the slope

c is the y intercept

Slope of the line using points

(1, -1) and (-3, 1) is

$m = \frac{1 + 1}{ - 3 - 1} = - \frac{2}{4} = - \frac{1}{2}$

Equation of the line using point

( 1 , - 1) and slope - 1/2 is

$y + 1 = - \frac{1}{2} (x - 1) \\ y + 1 = - \frac{1}{2} x + \frac{1}{2} \\ y = - \frac{ 1}{2} x + \frac{1}{2} - 1 \\ y = - \frac{1}{2} x - \frac{1}{2}$