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3 years ago

Help me with this please !!!! I will give you 50 POINTS!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Mumz [18]3 years ago

5 0

Answer:

Option A

Step-by-step explanation:

Option A

f(x) = -3(x + 7)(x + 4),

Remember that to solve for the x-intercepts we equate y to 0,

-3(x + 7)(x + 4) = 0

Using the zero product property,

x + 7 = 0, x + 4 = 0

x = - 7, x = -4

x -intercepts: (- 7, 0) & (- 4, 0)

Hence proved.

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The table shows the values of a function f(x).

Inessa [10]

Answer:

-4

Step-by-step explanation:

The average rate of change of a function f(x) between two points x = a and x=b is given by,

$f(x)=\frac{f(b)-f(a)}{b-a}$

This can be understood with a simpler example, the straight line.

In this case, the rate of change of the 'function' is given by the slope,

$m=\frac{f(x_{2})-f(x_{1})}{x_{2}-x_{1}}$ ;

$(x_{1},f(x_{1})),(x_{2},f(x_{2}))$ being two points on the straight line.

So, for the given problem,

a = -2

b = 2

Hence, average rate of change of $f(x)=\frac{f(2)-f(-2)}{2-(-2)} =\frac{9-25}{2+2} =\frac{-16}{4} =-4$

6 0

4 years ago

Read 2 more answers

Use the net to determine the total surface area A 96 B 64 C 80 D 112

krok68 [10]

Answer:

A) 96

Step-by-step explanation:

5 0

4 years ago

HELP! NOW! <br> Prove the trig identity:<br> 3sinx/1-cosx=3cscx+3cotx

vichka [17]

Step-by-step explanation:

Given

To Prove

$\dfrac{3\sin x}{1-\cos x}=3\csc x+3\cot x$

Take the Left side of equation and rationalize

$\Rightarrow \dfrac{3\sin x}{1-\cos x}\times \dfrac{1+\cos x}{1+\cos x}\\\\\Rightarrow \dfrac{3\sin (1+\cos x)}{1-\cos^2 x}\\\\\Rightarrow \dfrac{3\sin (1+\cos x)}{\sin^2 x}\\\\\Rightarrow \dfrac{3\sin x}{\sin ^2x}+\dfrac{3\sin x\cos x}{\sin^2 x}\\\\\Rightarrow \dfrac{3}{\sin x}+\dfrac{3\cos x}{\sin x}\\\\\Rightarrow 3\csc x+3\cot x$