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iragen [17]
3 years ago
9

Answers to 1,2,or 3 of these 3

Mathematics
1 answer:
vivado [14]3 years ago
7 0
4)
pine tree is most numerous on tree farm which is  40% 

5)
if 480 trees total,
pine trees = 480 x 0.40 = 192 trees

6)
if 480 trees total,
spruce trees = 480 x 0.30 = 144 trees
(p.s. also firm trees = 144 (same as spruce trees)
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Edward is driving a car on the highway. He drives for 28.5 miles in 3/8 of an hour. At this rate, how much distance can he cover
kari74 [83]

Answer:

76 Miles.

Step-by-step explanation:

28.5/3=9.5

9.5(8)=76

5 0
3 years ago
Use the given zero to find the remaining zeros of each function f(x)=2x^4+5x^3+5x^2+20x-12 zero:-2i
frutty [35]

Answer:

1/2, 3

Step-by-step explanation:

This is a pretty involved problem, so I'm going to start by laying out two facts that our going to help us get there.

  1. The Fundamental Theorem of Algebra tells us that any polynomial has <em>as many zeroes as its degree</em>. Our function f(x) has a degree of 4, so we'll have 4 zeroes. Also,
  2. Complex zeroes come in pairs. Specifically, they come in <em>conjugate pairs</em>. If -2i is a zero, 2i must be a zero, too. The "why" is beyond the scope of this response, but this result is called the "complex conjugate root theorem".

In 2., I mentioned that both -2i and 2i must be zeroes of f(x). This means that both x-2i and x+2i are factors of f(x), and furthermore, their product, x^2+4, is <em>also</em> a factor. To see what's left after we factor out that product, we can use polynomial long division to find that

2x^4+5x^3+5x^2+20x-12=(x^2+4)(2x^2+5x-3)

I'll go through to steps to factor that second expression below:

2x^2+5x-3=2x^2+6x-x-3\\=2x(x+3)-(x+3)\\=(2x-1)(x+3)

Solving both of the expressions when f(x) = 0 gets us our final two zeroes:

2x-1=0\\2x=1\\x=1/2

x+3=0\\x=-3

So, the remaining zeroes are 1/2 and 3.

8 0
3 years ago
Read 2 more answers
5. Wendy wants to find her average monthly expenses. In October she spent $450, In November she spent $750, In December she spen
andrezito [222]

Answer:

$691.25

Step-by-step explanation:

so u need to:

$450 + $750 + $1,000 + $565

you will get

2765.

so then u got to divide 2765 by 4

2765/4= 691.25

$691.25

thats how u get it:)

4 0
3 years ago
What is greater than 0.1 and less than 0.2.
masya89 [10]
Just write a number in between such as 0.118976453... or 0.128675,etc
5 0
3 years ago
Determine whether or not each relationship represents a function. explain your reasoning
Alekssandra [29.7K]

Answer:

  • left: yes
  • right: no

Step-by-step explanation:

A function maps an x-value to a single y-value. The graph of the parabola on the left does that.

The table on the right maps -1 to both 10 and 20, so does not meet the definition of a function.

7 0
2 years ago
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