Need Math help ASAP

Mathematics

1 answer:

Ber [7]3 years ago

4 0

Answer:

35 seconds

Step-by-step explanation:

At negative values he is inside the volcano, when he reaches 0 he will be at the top of the volcano

At 35 seconds, the elevation is 0, so he is at the top of the volcano

You might be interested in

Find the vertex of y=(x-3)^2

Elza [17]

The vertex form of parabola is,

$y=a(x-p)^2+q$

Where $(p,q)$ is vertex point.

In this case our parabola is given by,

$y=1(x-3)^2+0$

Hence the vertex is at $(3,0)$ .

Hope this helps.

3 0

4 years ago

An airplane is preparing to land at an airport. It is 41,300 feet above the ground and is descending at the rate of 3,100 feet p

MissTica

9514 1404 393

Answer:

after 7 minutes
19,600 feet

Step-by-step explanation:

Here's the "pencil and paper" solution:

The two altitude equations are ...

y = 41300 -3100x
y = 2800x

They can be solved by setting the expressions for y equal to each other.

2800x = 41300 -3100x

5900x = 41300

x = 41300/5900 = 7

y = 2800·7 = 19600

The planes will both be at 19,600 feet after 7 minutes.

_____

Attached are solutions from a graphing calculator, and from a calculator app that is able to solve systems of equations.

I find the graphing calculator the easiest to use. I can enter equations using a keyboard, and the solution is displayed in a form that can be copied and pasted.

The calculator app on my phone requires equation entry using a small on-screen keyboard, with multiple key hits required to access some functions. (y is obtained by hitting the x key twice, for example.)

The "pencil and paper" solution is not so difficult, but requires a certain amount of writing (or good short-term memory). The solutions for x and y require separate calculations, whereas the other methods give both x and y at the same time.