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3 years ago

Pls guys need help...i have test tomorrow

Mathematics

2 answers:

Sergeu [11.5K]3 years ago

4 0

Answer:

18x

Step-by-step explanation:

3x^2 - 27 = -18x

x^2 - 3x = -1x

-18x / -1x = 18x

3x^2 = 9

x^2 = 2x

zalisa [80]3 years ago

4 0

Answer: 18x

Step-by -step: first you started with 3x^2 which is 9x then go to 9x-27 which is 18x
Next you go to x^2 with is also know as 1x^2 which can be 2. Then you subtract 2x -3x which can be 1x. Finally you divide 18x to 1x giving you the answer 18x

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Write the quadratic equation whose roots are 4 and 5, and whose leading coefficient is 4.

Umnica [9.8K]

Answer:

Answer: 4x² - 9x + 20 

Step-by-step explanation:

• General quadratic equation:

${ \rm{ {x}^{2} - (sum \: of \: roots)x + (product \: of \: roots) }}$

• sum of roots → 4 + 5 = 9

• product of roots → 4 × 5 = 20

• substitute:

${ \boxed{ \rm{4 {x}^{2} - 9x + 20 }}}$

3 0

2 years ago

If h(x)=(fog)(x) and h(x)=³√x+3, find g(x) if f(x) =³√x+2

ipn [44]

Answer:

$g(x)=x+1$

The problem:

Find $g(x)$ if $h(x)=(f \circ g)(x)$ ,

$h(x)=\sqrt[3]{x+3}$ , and

$f(x)=\sqrt[3]{x+2}$ .

Step-by-step explanation:

$h(x)=(f \circ g)(x)$

$h(x)=f(g(x))$

Replace $x$ in $f(x)=\sqrt[3]{x+2}$ with $g(x)$ since we are asked to find $f(g(x))$ :

$\sqrt[3]{x+3}=\sqrt[3]{g(x)+2}$

$\sqrt[3]{x+1+2}=\sqrt[3]{g(x)+2}$

This implies that $x+1=g(x)$

Let's check:

$(f \circ g)(x)$

$f(g(x))$

$f(x+1)$

$\sqrt[3]{(x+1)+2}$

$\sqrt[3]{x+1+2}$

$\sqrt[3]{x+3}$ which is the required result for $h(x)$ .

6 0

3 years ago

What is 8% of $14.15?

Naily [24]

Answer:

13.018

Step-by-step explanation:

14.15 minus 8 percent = 13.018

8 0

2 years ago

Find the surface area of the regular pyramid shown to the nearest whole number. plz help

Sav [38]

The surface area of the regular hexagonal pyramid is
SA = (1/2) pl + B
where p is the perimeter of the base, l is the slant height of the pyramid, and B is the area of the base
The area of a regular hexagon is 3 sh
where s is the length of the side and h is the length of the apothem.
So,
SA = (1/2)(6)(12) (11) + 3(12)(6sqrt3)
SA = 770 square meters

5 0

2 years ago

Read 2 more answers

Is (-4,4) the solution of the system. 4x+5y>-6 and -2x+7y>20

nikklg [1K]

Answer:

It is a solution, one of an infinite number of solutions.

Step-by-step explanation:

You can check to see if the given point is in the solution set:

4(-4) +5(4) = -16 +20 = 4 > -6 . . . . yes

-2(-4) +7(4) = 8 +28 = 36 > 20 . . . yes

The offered point satisfies both inequalities, so is in the solution set. It is not the solution, but is one of an infinite number of solutions.

7 0

3 years ago

Pls guys need help...i have test tomorrow​

Pls guys need help...i have test tomorrow