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Luden [163]
3 years ago
12

What is the area of the following circle r=2

Mathematics
1 answer:
denpristay [2]3 years ago
8 0

Answer:

12.57

Step-by-step explanation:

\pi r^2\\\pi (2)^2\\=12.57

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Y=x^{2} +2x-8 determine the axis of symmetry, the vertex point and find the roots by factoring
Inessa [10]

Answer:

x = -1 <--- axis of symmetry

(-1, -9) <-- vertex

2, -4  (or, in my old precalc class we wrote our roots as (2,0) and (-4,0))   <--- roots

Step-by-step explanation:

a) Axis of symmetry equation is defined as

-b/2a = x  (i memorized this)

Quadratic equation form:

ax^2+bx+c

And our original equation:

x^2+2x-8

So..

-2/2 = - 1

So our axis of symmetry is at x = -1,

b) now vertex point can be found by plugging this value back into our original equation.

y = (-1)^2+2(-1)-8

y = 1 - 2 - 8

y = - 9

So our vertex is at (-1, -9)

c) Finally, lets factor

x^2+2x-8 = 0  (when finding the roots, set y = 0, because we are trying to find where we cross the x-axis)

x^2-2x+4x-8 = 0

x(x-2) + 4(x-2) = 0

(x-2)(x+4)=0

x = 2; x = -4 <--- Roots

4 0
3 years ago
Hellllp!!!!! i dont get this at all
77julia77 [94]
[(25-11)+(15-9)] / 5

First you take care of the numbers in the brackets & then parenthesis.

25-11=14 and 15-9=6

Now you add both of those numbers together.

14+6=20

Now you divide.

20/5
=4

4 0
3 years ago
Read 2 more answers
Which of the following is a nonlinear function
pogonyaev

Answer:

Linear functions are equations where the greatest power of the variable (typically x) is 1;

They are graphed as straight lines;

So, any function that has the following format:

f(x) = ax + b;

Nonlinear functions would be any equation that has a variable to a power greater than 1;

This could be a quadratic equation or an exponential equation

6 0
2 years ago
You begin with $100.00 at the beginning of the month. This amount is cut in half each day. How much will you have on day 7? Begi
Strike441 [17]
Day 1 - 100
Day 2 - 50
Day 3 - 25
Day 4 - 15
Day 5 - 10
Day 6 - 5
Day 7 - 2.5
6 0
3 years ago
Graph for 4x + 3y = -3
Serga [27]

Answer:

Your answer is: Slope = -\frac{4}{3} Y-intercept = (0,-1)

Graph the line using the slope and y-intercept, or two points.

Step-by-step explanation:

Graph Below : ↓

Hope this helped : )

6 0
2 years ago
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