Helppp me i neeed help

Mathematics

2 answers:

bearhunter [10]3 years ago

7 0

6 is your answer
Hope I helped

dexar [7]3 years ago

6 0

Total no. of buttons = 300 + 700 + 1000

+ 500 = 2500

Possibility for a person to pick a pink button = 300/2500 = (3/25)%

Amount of pink buttons she can expect her friends to pick = 50(3/25) = 6

She can expect to make 6 pink barrettes.

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Can someone please help me with this problem, it is really confusing

levacccp [35]

Answer =-0.7x +0

Find the gradient by y2-y1/x2-x1
-14 -7/ 20- -10
-21/30
-0.7
And plug in the coordinates to find the y intercept
7= -0.7 (-10) + c
C=0

4 0

3 years ago

the graph of the function f(x) = ax^2 + bx + c (where a, b, and c are real and non zero) has two x- intercepts. explain how to f

Dovator [93]

The vertex of the parabola is given by :

$\displaystyle{ ( \frac{-b}{2a}, f(\frac{-b}{2a}) )$ .

So, $\displaystyle{ \frac{-b}{2a}$ is the first coordinate of the vertex, which means it is also the point where the line of symmetry passes.

The line of symmetry divides the parabola into 2 symmetrical parts: the x-intercepts are also symmetrical to each other with respect to this line.

So, if one of the x-intercepts is $\displaystyle{ (\frac{-b}{2a}+3, 0)$ , that is 3 units to the right of the x-intercept, the other must be 3 units to the left. Thus, the second x-intercept is :

Answer: $\displaystyle{ (\frac{-b}{2a}-3, 0)$ ,