3 years ago

HELPPPPPPPP!!!!!!!!!!! Pleaseeeeeee!!!!!!!

Mathematics

2 answers:

kvv77 [185]3 years ago

6 0

Answer:

Step-by-step explanation:

Sorry if this is wrong.

zheka24 [161]3 years ago

6 0

I don’t know if it’s c or a :////

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What is the sum of x2-3x+7 and 3x2+5x-9

Ghella [55]

(x² - 3x + 7) + (3x² + 5x - 9)
(x² + 3x²) + (-3x + 5x) + (7 - 9)
4x² + 2x - 2

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3 years ago

Solve for f.<br> -f + 2 + 4f = 8 - 3f

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A circle has an arc of length 24π that is intercepted by a central angle of 80°. What is the radius of the circle?

bixtya [17]

I got radius= 54
arc/2pi r = degrees/360
then fill in what you know: 24pi/2pi r = 80/360
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3 years ago

Is it linear or not? 2x+5xy-3=0.

ArbitrLikvidat [17]

The linear equation in slope intercept form: y = mx + b.

We have:

$2x+5xy-3=0\qquad\text{subtract 2x from both sides}\\\\5xy-3=-2x\qquad\text{add 3 to both sides}\\\\5xy=-2x+3\qquad\text{divide both sides by}\ 5x\neq0\\\\y=\dfrac{-2x+3}{5x}$

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3 years ago

What is the volume of the cone?

Radda [10]

Data:
r (radius) = 6 cm
h (height) = 12 cm
V (volume)= ?

Formula:
$V = \frac{ \pi * r^2 * h}{3}$

Solving:
$V = \frac{ \pi * r^2 * h}{3}$
$V = \frac{ \pi * 6^2 * 12}{3}$
$V = \frac{ \pi *36*12}{3}$
$V = \frac{432 \pi }{3}$
$\boxed{\boxed{V = 144 \pi cm^3}}\end{array}}\qquad\quad\checkmark$

Answer:
<span>D 144 pi cm^3</span>

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3 years ago