MATHEMATICS HIGH SCHOOL

HELP I NEED HELP ASAPLuke kicked a soccer ball into the air. The height, f(x), of the ball, in meters, after x seconds was modeled with the function f(x)=-4.5x^2+27x. How many seconds did it take for the soccer ball to hit the ground?

A. 40.5 seconds
B. 3 seconds
C. 6 seconds
D. 2.5 seconds

Answers

Answer 1
Answer:

Answer:

i think this is the answer

A. 40.5 secods

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Two times the sum of nine and a number is the opposite of 9.
Write an equation and solve.

Answers

The number is -27/2 if two times the sum of nine and a number is the opposite of 9 after applying the concept of the linear equation.

What is a linear equation?

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

It is given that:

Two times the sum of nine and a number is the opposite of 9.

Let the number be x:

2(x + 9) = -9

2x + 18 = -9

2x = - 9 - 18

2x =- 27

x = -27/2

Thus, the number is -27/2 if two times the sum of nine and a number is the opposite of 9 after applying the concept of the linear equation.

Learn more about the linear equation here:

brainly.com/question/11897796

#SPJ2

- - 2*-9x

This is because you have "two times" which is 2*

The sum of a number = x
 
Opposite of 9 = -9

Y'all I'm crying...help ​

Answers

Answer:

Below in bold.

Step-by-step explanation:

C1 = 180 - C2

= 180 -  (170-2x)

= 10 + 2x

So B3 = 10+2x (alternate angles).

and B2 = 90 - B3

= 90 - (10 + 2x)

= 80 - 2x.

Solve the following system of equations for x: 4x + y = 11 x + y = 2

Answers

Hello,

4x+y=11 (1)
x+y=2 (2)

(1)-(2)==>3x=9 ==>x=3 and y=2-3=-1
Sol={(3,-1)}

The bases of a circular cylinder are two ___ circles.

Answers

Well,

A cylinder is actually a special type of prism.  A prism is a 3-D figure made by taking a simple closed plane curve and translating it across space in a certain direction and for a given distance and then connecting the preimage and the image.  A cylinder is just a prism made with a circle.

We know from translations that the image is congruent to the preimage.  Thus, the bases of a (circular) cylinder are two congruent circles.
I'd say symmetric? Are there any options?

7|3y – 4|– 8 = 48
Please help!

Answers

Answer: y=4 or y= 4 over 3

Step-by-step explanation:

Answer:

y=4

Step-by-step explanation:

How to factorise this?!
4x-14xy

Answers

Find the highest common factor, which is 2X, therefore, this goes outside of the bracket. So inside goes 4x/2x= 2 & 14xy/2x= 7y2x(2-7y)When you multiply out of the brackets, everything should be equal
Take a factor of x out of the equation:
2x(2-7y)
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