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Korvikt [17]
3 years ago
10

Help!!

Mathematics
1 answer:
Mkey [24]3 years ago
4 0
1.  this is a series of squares  Formula is an = n^2

2. Arithmetic series with common difference d = -2.

an = a1 + (n-1)d  = 3 -2(n-1)


Cant see the rule for Number 3

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when (2x - 3)^2 is subtracted from 5x^2, what is the result? And how can I show the answer? Thank you x
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5x^2 - (2x - 3)^2 = 
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5x^2 - (4x^2 - 12x + 9) =
5x^2 - 4x^2 + 12x - 9 =
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What is the value of x in the equation below?<br><br> 1/3(12x-24)=16
agasfer [191]
1/3(12x-24)=16
*3                  *3
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How to solve number 5.
BabaBlast [244]
Larger?...... I dunno
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2 years ago
A quadratic function is a function of the form y=ax^2+bx+c where a, b, and c are constants. Given any 3 points in the plane, the
pochemuha

Answer:

The quadratic function whose graph contains these points is y=-x^{2}-2x-2

Step-by-step explanation:

We know that a quadratic function is a function of the form y=ax^{2}+bx+c. The first step is use the 3 points given to write 3 equations to find the values of the constants <em>a</em>,<em>b</em>, and <em>c</em>.  

Substitute the points (0,-2), (-5,-17), and (3,-17) into the general form of a quadratic function.

-2=a*0^{2}+b*0+c\\c=-2

-17=a*-5^{2}+b*-5+c\\c=-25a+5b-17

-17=a*3^{2}+b*3+c\\ c=-9a-3b-17

We can solve these system of equations by substitution

  • Substitute c=-9a-3b-17

-9a-3b-17=25a+5b-17\\-9a-3b-17=-2

  • Isolate a for the first equation

-9a-3b-17=-25a+5b-17\\a=\frac{b}{2}

  • Substitute a=\frac{b}{2} into the second equation

-9\left(-\frac{b}{2}\right)-3b-17=-2

  • Find the value of b

-9\left(-\frac{4b}{17}\right)-3b-17=-2\\ b=-2

  • Find the value of a

a=\frac{b}{2}\\  a=-1

The solutions to the system of equations are:

b=-2,a=-1,c=-2

So the quadratic function whose graph contains these points is

y=-x^{2}-2x-2

As you can corroborate with the graph of this function.

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Your regular pay of $67, plus tips, came up to $182.50. How much was the tips?
OLga [1]
The tips were $115.50
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