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3 years ago

Having trouble answering these

Mathematics

1 answer:

tensa zangetsu [6.8K]3 years ago

7 0

Answer:

i can't see clearly

Step-by-step explanation:

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CAN SOMEONE PLEASE HELP!!!! determine the value of x. i’ll give you points if you answer!

salantis [7]

Answer:

2.4

Step-by-step explanation:

Look up 30-60-90 right triangle and use that formula. Since the angle in the middle is 90 degrees, it should work. The side of x would be double of the given side 1.2... this is what I would do

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3 years ago

What is the square root of -1?

NeX [460]

Answer:

Step-by-step explanation:

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This parabola has<br> x-intercepts

slega [8]

Answer:

see the explanation

Step-by-step explanation:

we have the quadratic equation

$y=-16x^{2} +32x-10$

This is a vertical parabola open downward

The vertex is a maximum

Find the x-intercepts of the quadratic equation

The x-intercepts are the values of x when the value of y is equal to zero

For y=0

$-16x^{2} +32x-10=0$

Solve the quadratic equation

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16x^{2} +32x-10=0$

$a=-16\\b=32\\c=-10$

substitute in the formula

$x=\frac{-32(+/-)\sqrt{32^{2}-4(-16)(-10)}} {2(-16)}$

$x=\frac{-32(+/-)\sqrt{384}} {-32}$

$x=\frac{-32(+/-)8\sqrt{6}}{-32}$

$x=\frac{-32(+)8\sqrt{6}}{-32}=\frac{32(-)8\sqrt{6}}{32}=0.39\ sec$

$x=\frac{-32(-)8\sqrt{6}}{-32}=\frac{32(+)8\sqrt{6}}{32}=1.61\ sec$

therefore

This parabola has two x-intercepts representing the times when the dolphin's height above water is zero feet

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2 years ago

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The area of a semicircle is A=1/2(3.14)r^2 solve for r

Inessa05 [86]

First divide bot sides of the formula by 1/2(3.14):-

2A / 3.14 = r^2

r = sqrt (2A/3.14)

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3 years ago

Find the measure of the indicated angle.

Nady [450]

Answer:

X=4

Step-by-step explanation:

30x+5=31x+1

x=4

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3 years ago