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Evgen [1.6K]
3 years ago
12

Rosa’s work finding the median of a set of test scores is shown below.

Mathematics
1 answer:
Softa [21]3 years ago
4 0

Answer:

i would need some options ( :

Step-by-step explanation:

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Marsha's class is planting 120 trees as part of a community volunteer project. The class plants pine trees and oak trees in a ra
Ivanshal [37]

Answer:

pine:oak=3:1

pine=3/4*120

pine=90 trees

Step-by-step explanation:

6 0
3 years ago
The change in water level of a lake is modeled by a polynomial function, W(x). Describe how to find the x-intercepts of W(x) and
Agata [3.3K]
<span>First. <u>Finding the x-intercepts of </u>W(x)
</span><span>
Let W(x) be the change in water level. So to find the x-intercepts of this function we can use The Rational Zero Test that states:

To find the zeros of the polynomial:

f(x)=a_{n}x^{n}+a_{n-1}x^{n-1}+...+a_{2}x^{2}+a_{1}x+a_{0}

We use the Trial-and-Error Method which states that a factor of the constant term:

a_{0}

can be a zero of a polynomial (the x-intercepts).

So let's use an example: Suppose you have the following polynomial:

W(x)=x^{4}-x^{3}-7x^{2}+x+6

where the constant term is a_{0}=6. The possible zeros are the factors of this term, that is:

1, -1, 2, -2, 3, -3, 6 \ and \ -6.

Thus:

</span>W(1)=0 \\ W(-1)=0 \\ W(2)=-12 \\ W(-2)=0 \\ W(3)=0 \\ W(-3)=48 \\ W(6)=840 \\ W(-6)=1260<span>

From the foregoing, we can affirm that 1, -1, -2 \ and \ 3 are zeros of the polynomial.

</span>Second. <u>Construction a rough graph of</u> W(x)

Given that this is a polynomial, then the function is continuous. To graph it we set the roots on the coordinate system. We take the interval:

[-2,-1]

and compute W(c) where c is a real number between -2 and -1. If W(c)>0, the curve start rising, if not, the curve start falling. For instance:

If \ c=-\frac{3}{2} \\ \\ then \ w(-\frac{3}{2})=-2.81

Therefore the curve start falling and it goes up and down until x=3 and from this point it rises without a bound as shown in the figure below


7 0
3 years ago
Read 2 more answers
PLS ANSWER AS SOON AS POSSIBLE
telo118 [61]
Side angle side and yes
8 0
2 years ago
What is the value of b that satisfies the equation below <br> 3(b+4)-2(2b+3)=-4
zloy xaker [14]

3(b+4)-2(2b+3)=-4 \\3b+12-4b-6=-4 \\-b=-10 \\b=10

The answer is C.

Hope this helps.

3 0
3 years ago
Read 2 more answers
A paint can has a radius of 4 inches and a height of 15 inches. What is the volume of the paint can? Round to the nearest tenth.
Hunter-Best [27]

Answer:

753.6

Step-by-step explanation:

3.14x4²x15

\pir^2x15

3 0
3 years ago
Read 2 more answers
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