3 years ago

A third degree polynomial equation with rational coefficients that has roots -4 and 2+i

1 answer:

8 0

If one of the roots is 2+i, another must be 2-i. We can express this polynomial as (x+4)(x-2-i)(x-2+i). This expands to $x^3-11x+20$ .

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1. Graph the function y= 2/x. Draw a chart to show at least four ordered pairs that are on the graph.

blsea [12.9K]

Y = 2/x

x must not have the value of 0 because x is used as a denominator.
A denominator must not have a value of 0 because the overall value of the fraction is undefined.

x may be any positive or negative integer.

x = 1
y = 2/1 = 2 ⇒ (1,2)

x = 2
y = 2/2 = 1 ⇒ (2,1)

x = 3
y = 2/3 = 0.67 ⇒ (3, 2/3)

x = -1
y = 2/-1 = -2 ⇒ (-1,-2)

x = -2
y = 2/-2 = -1 ⇒ (-2, -1)

x = -3
y = 2/-3 or -0.67 ⇒ (-3, -2/3)

7 0

3 years ago

A high school class wants to make at least $1500 by hosting a dance. The class knows that they will make $500 in refreshments.

DiKsa [7]

Answer: part A= (1500 - 500) = 5m

part B= (1500 - 500) = 5m

= 1000 = 5m

1000/5= m

200=m

Step-by-step explanation:

Hope i helped and got it right

4 0

3 years ago

Write in exponential form.<br><br>a · a · a · a · b · b · b · b · b · b

Nimfa-mama [501]

Answer:

A^4xb^6

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

PLEASE ANSWER ASAP !!!!!!!!!!(x + 5)2 + y² = 13<br> 2x + y = -2

Ymorist [56]

Answer:

(1 + y)(x + 2y)

hope this is right

Step-by-step explanation:

5 0

3 years ago

A colored chip is yellow on one side and red on the other. The chip was flipped 50 times and landed red side facing up 21 times.

faust18 [17]

42%

You have essentially a fraction, 21/50, which gives you a decimal of 0.42, or 42%.

(Flipped a total of 50 times, of those, it landed red side up 21 times, so 21/50)

8 0

3 years ago