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3 years ago

Multiply 4x²(3x3 + 8x2 – 9x)

Mathematics

1 answer:

zlopas [31]3 years ago

7 0

Answer:

4x²(9+16-9x)

=36x²+64x²-x³

=100x²-x³

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HELPPPP 9-12 I'LL GIVE YOU BRAINLIEST!!!

Levart [38]

Answer:

19/20- 0.95; 95%

9/16- 0.5625; 56%

0.4- 2/5; 40%

0.22- 22%; 11/50

Step-by-step explanation:

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2 years ago

An object is thrown upward at a speed of 124 feet per second by a machine from a height of 19 feet off the ground. The height h

klasskru [66]

a) For this question we set h=59 and solve for t, in order to do so we use the general formula for second-degree equations:

$\begin{gathered} t=\frac{-124\pm\sqrt[]{124^2-4(-16)(-40)}}{2(-16)} \\ t=\frac{-124\pm113.21}{-32} \end{gathered}$

The height of the object will be 59 feet at t=7.41 seconds and t=0.34 seconds.

b) When the object reaches the ground, h=0 therefore:

$0=-16t^{2}+124t+19$

Solving for t we get:

$\begin{gathered} t=\frac{-124\pm\sqrt[]{124^2-4(-16)(19)}}{2(-16)} \\ t=\frac{-124\pm\sqrt[]{16592}}{-32}=\frac{-124\pm128.81}{-32} \end{gathered}$

Therefore, since t cannot be negative the solution is t=7.9 seconds.

7 0

1 year ago

Which of the following best describes the set of all numbers of the forn a+bi where a and b are any real numbers and i equals sq

notsponge [240]

<h2>Answer:</h2>

option: B is the correct answer.

B. complex numbers.

<h2>Step-by-step explanation:</h2>

We know that a complex number is always written in the form of :

a+ib

where a and b are real numbers and i is the square root of -1.

i is called an imaginary number.

If a>0 and b>0 then the point lie in the first quadrant.

if a>0 and b<0 then the point lie in the fourth quadrant.

if a<0 and b>0 then the point lie in the second quadrant.

if a<0 and b<0 then the point lie in the third quadrant.

4 0

3 years ago

Factor out the GCF<br> 4g^3-6g+20g^2

elena55 [62]

Answer:

$\sf 2g(2g ^2-3+10g)$

Step-by-step explanation:

$\sf 4g^3-6g+20g^2$

GFC: 2g

We'll Write the GCF first, then, divide each term by the GCF.

$\sf 2g(\frac{4g^3}{2g}-\frac{6g}{2g} +\frac{20^2}{2g} )$

$\sf 2g(2g ^2-3+10g)$

6 0

2 years ago

Which expression is equivalent to i^233?<br><br> A) 1<br> B) –1<br> C) i<br> D) –i

DerKrebs [107]

$i^{233}=i^{232+1}=i^{232}i=i^{4\times58}i=(i^4)^{58}i=1^{58}i=i$

5 0

3 years ago