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2 years ago

Simplify the following. (9x2+7x-6)+(9x2-7x+6)

Mathematics

1 answer:

kipiarov [429]2 years ago

6 0

Answer:

9 x 2 + 7x

18 + 7x - 6

18 - 6 = 12

12 + 7x

Is your simplified expression

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Which side lengths form a triangle that is similar to triangle ABC

kotykmax [81]

A.
10x3=30
15x3=45
7x3=21
All sides have increased in size by 3 times.

4 0

3 years ago

What’s the Answer?? Please!!

Nataly [62]

Finding the slope using two points:

The formula for slope is

$\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

In this case...

(1, 9) and (-3, 16)

$y_{2} =16\\y_{1} =9\\x_{2} =-3\\x_{1} =1$

^^^Plug these numbers into the formula for slope...

$\frac{16-9}{-3 -1}$

$\frac{7}{-4}$

C. $\frac{-7}{4}$

^^^This is your slope

Hope this helped!

~Just a girl in love with Shawn Mendes

4 0

3 years ago

Lim x->pi/3 ((2cosx-1)/(tan^2x-3))

beks73 [17]

You can check that the limit comes in an undefined form:

$\displaystyle \lim_{x\to\frac{\pi}{3}} \frac{2\cos(x)-1}{\tan^2(x)-3}=\dfrac{0}{0}$

In these cases, we can use de l'Hospital rule, and evaluate the limit of the ratio of the derivatives. We have:

$\dfrac{\text{d}}{\text{d}x}2\cos(x)-1 = -2\sin(x)$

and

$\dfrac{\text{d}}{\text{d}x}\tan^2(x)-3 = 2\dfrac{\tan(x)}{\cos^2(x)}=\dfrac{2\sin(x)}{\cos^3(x)}$

So, we have

$\displaystyle \lim_{x\to\frac{\pi}{3}} \frac{2\cos(x)-1}{\tan^2(x)-3}=\lim_{x\to\frac{\pi}{3}} \dfrac{-2\sin(x)}{\frac{2\sin(x)}{\cos^3(x)}}=\lim_{x\to\frac{\pi}{3}}-\cos^3(x)=-\cos^3\left(\dfrac{\pi}{3}\right)$

6 0

2 years ago

Can someone answer the 2 questions in the picture i really need help

Radda [10]

Hi.

The first question is a direct variation — specifically y = 1.8x

In the second one (if my calculations are correct), it's not a direction variation.

Hope this helps :)

Calculations:

y = 1.8(3) = 5.4

y does not equal x, 2x, or -2x.

7 0

3 years ago

Which graph represents exponential decay? On a coordinate plane, a straight line has a negative slope. On a coordinate plane, a

RoseWind [281]

Answer:

The correct option is (C).

Step-by-step explanation:

The exponential function representing decay is as follows:

$y=y_{0}\cdot e^{kt};\ k$

Here,

y = final value

y₀ = initial value

k = growth rate

t = time passed

The graph represents exponential decay is:

"On a coordinate plane, a graph approaches y = 0 in quadrant 1 and curves up into quadrant 2."

Thus, the correct option is (C).

3 0

3 years ago

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