MATHEMATICS HIGH SCHOOL

Pls help dew in 5 and pls no links or trolling.

Answers

Answer 1

Answer:

Answer:

She has to get a 5

Step-by-step explanation:

So basically you have the numbers 4, 4, and 3.

To get a mean is the average, so we need to balance out the 3.

To balance it out, we add a 5.

We would have to get 16 points for it to be a mean of 4, 4 + 4 + 3 + 5 = 16.

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Jimmy and 4 of his friends went out to eat. They decided to split the bill evenly. Each person paid $13. What was the bills total?

Answers

Answer:

$65

Step-by-step explanation:

5x13= 65

transform the quadratic function y=-2x^2-12x-10 into vertex form. find the vertex, x and y intercepts.

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$The\ vertex\ form\ of\ y=ax^2+bx+c:y=a(x-h)^2+k\n\nwhere\ h=(-b)/(2a)\ and\ k=f(h)=(-(b^2-4ac))/(4a)\n-----------------------------\n\ny=-2x^2-12x-10\n\na=-2;\ b=-12;\ c=-10\n\nh=(-(-12))/(2(-2))=(12)/(-4)=-3\n\nk=f(-3)=-2(-3)^2-12(-3)-10=-2\cdot9+36-10=-18+26=8\n\ntherefore:y=-2(x-(-3))^2+8\to\boxed{y=-2(x+3)^2+8}\leftarrow The\ vertex\ form$

$y-intercept\to f(0)=-2(0^2)-12(0)-10=\boxed{-10}\leftarrow y-intercept$

$x-intercept\ if\ y=0\n\n-2x^2-12x-10=0\ \ \ \ \ |divide\ both\ sides\ by\ (-2)\nx^2+6x+5=0\nx^2+x+5x+5=0\nx(x+1)+5(x+1)=0\n(x+1)(x+5)=0\iff x+1=0\ or\ x+5=0\n\n\boxed{x=-1\ or\ x=-5}\leftarrow x-intercept$

y=-2x^2-12x-10
to find the x value of the vertex find the axis of symmetry which is
-b/2a
=12/2(-2)
=-3
to find the y value of the vertex sub the axis of symmetry back into the original equation.
y=-2(-3)^2-12(-3)-10
y=8
vertex=(-3,8)
to put it into vertex form use y=a(x-h)^2 +k where h and k are the x and y values of the vertex respectively.

y=-2(x--3)^2 +8
y=-2(x+3)^2+8

to find the x intercept let y=0

-2x^2-12x-10=0
x^2+6x+5=0
use quad formula and you will get
x=-5 and -1

to find the y intercept let x=0

y= -2(0)^2-12(0)-10
y=-10

In a function you cannot have to of the same x values right?

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Yes, in a function you cannot have two different images for the same x.

Because if an x has more than one image, you couldn't tell what is the value of the image given that x.

Five more than “n” is equal to 9.

Answers

Answer:

whats the question?

Step-by-step explanation:

Answer:

n=4

Step-by-step explanation:

To write this equation, we know that five more than n equals 5. The word "more" implies we are adding. So we can write n+5=9 as our equation. We need to isolate the variable, so we get only n on one side. So we subtract 5 from each side to isolate. 9-5=4. So our new equation is n=4. This is also our answer!

I hope this has helped you!

What is the maximum number of turning points the function f(x)=7x^5+6x^3-4x^2+1 , can have

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The maximum number of turning points of the polynomial is the degree of the polynomial minus 1. In this case the degree is 5, so the maximum number of turning points is 5-1=4.

3 times the sum of the first and the third integer is equal to 30 more than 4 times the second integer

Answers

there should be many answer to this question.. like if the second number is 3 the first and third numbers can be 6,8/9,5/10,4/11,3/12,2/13,1

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