It’s D
(It’s making me write more words)
Answer:
Step-by-step explanation:
8x² + 2(x²-1) = 8x² + 2*x² - 2*1
= 8x² + 2x² -2
= 10x² -2
Like terms: 8x² , 2x²
Answer:
x =19.2
y=29.8
Step-by-step explanation:
We will use the law of sines to solve this problem
sinA sin B
----------- = -------------
a b
sin 55 sin 40
--------- = ---------------
24.5 x
Using cross products
x sin 55 = 24.5 sin 40
Divide by sin 55
x = 24.5 sin 40 / sin 55
x =19.22512011
To one decimal place
x =19.2
To find the angle opposite y, we know the three angles of a triangle add to 180
y = (180-40-55) = 85
sin 55 sin 85
--------- = ---------------
24.5 y
Using cross products
y sin 55 = 24.5 sin 85
Divide by sin 55
y = 24.5 sin 85 / sin 55
y =29.79516474
To one decimal place
y=29.8
The width is 3m because 3*7 is 21m^2. Also they said the length is 4 more than the width (3+4=7)
Answer:
axis of symmetry is
.
The ordered pair of the vertex is
.
Step-by-step explanation:
Your function is a quadratic.
Compare
to
.
You should see that
.
The x-coordinate of the vertex or the axis of symmetry since the axis symmetry goes through the vertex can be found by computing
.
So here we go!
The axis of symmetry is
.
When you write your axis of symmetry be sure to write it as an equation.
That is the axis of symmetry is
.
Now that was also the x-coordinate of your vertex. To find the corresponding y-coordinate of the vertex, plug your value for
into
.

Put into calculator:
when 
The ordered pair of the vertex is
.