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3 years ago

6

What is the x and y intercept for this equation

1 answer:

Usimov [2.4K]3 years ago

6 0

What is the equation?

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Multiply (-3/4)(7/8)

Komok [63]

The answer is −0.857142857142857

7 0

3 years ago

Read 2 more answers

When you use deg. rad. and grad on a calculator, what does it mean?

Elanso [62]

Deg - degrees (mode in degrees)
rad - radians
grad -

these are all used to find angles, especially when doing trig

I am sorry but i am not exactly sure what grad means.

:)

6 0

2 years ago

Super Dave Osborne stands at the bottom of a canyon elevation 256 feet below sea level, he throws a piano up at a velocity of 3

fgiga [73]

Answer:

The piano was in the air for 18.34 seconds.

Step-by-step explanation:

The height of the piano after t seconds is given by the following equation:

$f(t) = -16t^{2} + 320t - 256$

Initially, the piano is below the ground level. At the first root of the equation, it will go into the air, and then some time after that it will fall down again, which is at the second root of the equation.

Roots of a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

$f(t) = -16t^{2} + 320t - 256$

So

$a = -16, b = 320, c = -256$

$\bigtriangleup = (320)^{2} - 4*(-16)*(-256) = 86016$

$t_{1} = \frac{-320 + \sqrt{86016}}{2*(-16)} = 0.8348$

$t_{2} = \frac{-320 - \sqrt{86016}}{2*(-16)} = 19.17$

Subtracting:

19.17 - 0.8348 = 18.34

The piano was in the air for 18.34 seconds.

6 0

3 years ago

7. Which of the following illustrates the commutative property of multiplication?

Zigmanuir [339]

X^2 + 5 = 5 + x^2 will give you the same answer. Also know as the commutative property. Answer is (3)

3 0

2 years ago

Write 11 1/5 in radical form

const2013 [10]

Answer: 11 1/7

hope this helps

7 0

2 years ago