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3 years ago

HELP IM CONFUSED PLS PLS WINNER GETS 8 POINTS

Mathematics

1 answer:

MrRa [10]3 years ago

3 0

(10x4x5)+(5x5x5) because you could make 2 shapes out of it. one being a cude that is 5x5x5 and the other being a rectangle that is 4x10x5 thenyou would just add them together. :) hope that helps

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LALLY MANLLITYONLILULIVE

uysha [10]

B 9x+10, this is because you just simply combine like terms

5 0

3 years ago

Consider the functions f and g in the tables below. f(x) = 90x2 + 180x + 92 x y 0 92 1 362 2 812 3 1,442 4 2,252 5 3,242 g(x) =

sukhopar [10]

Since f(x) is a polynomial function and g(x) is an exponential function, we know that both the value and the rate of change of g(x) will exceed those of f(x) when x gets large.

The rate of change of g(x) is less than that of f(x) for x < 3.4. The value of g(x) is less than that of f(x) for x < 4.39. Of the statements offered, the only one that is true is ...

... As x increases, the rate of change of g exceeds the rate of change of f.

_____

In the attached graph, the functions are graphed as solid lines; their rates of change are graphed as dashed lines of the same color.

3 0

3 years ago

PLEASE HELP!!! What is factoring? Why is it useful to try to factor out the GCF first when factoring? Explain the relationship b

Mkey [24]

Answer:

<h2>What is factoring? </h2>

Factoring is finding what to multiply to find an expression. It is like splitting expression into a multiplication of simplified expression.

<h2>Why is it useful to try to factor out the GCF first when factoring?</h2>

Greatest common factor or GCF of two numbers is the largest number that divides evenly in both numbers, GCF works the same in polynomials, which divide the expression evenly .

<h2>Explain the relationship between factoring and multiplying polynomials. Give an example to help explain</h2>

Factoring take away the multiplication, to factorize a polynomial it means take apart what is multiplied. the best example is a²+b²+2ab ( multiplied)

factorize :(a+b)(a+b) take apart what is multiplied

<h2>Factor x^2-25, 3x^2-12x-15, and x^3+2x^2+3x+6</h2>

x²-25 =(x+5)(x-5)

3x²-12x-15 = 3(x²-4x-5) GCF=3

3(x-5)(x+1)

x³+2x²+3x+6 (x+2) common factor

(x+2)(x²+3)

<h2>What are the key features needed to graph a polynomial function?</h2>

the key features are the vertex, axis of symmetry, x and y intercept

<h2>Explain how to find these key features to sketch a rough graph of a polynomial function</h2>

parabola : y=ax²+bx+c

ex: 3x²-12x-15

find vertex (h,k)

h=-b/2a =-(-12)/2(3)=2

k=f(h)=f(2)=3(2)²-12(2)-15

k=12-24-15=-27

vertex=(2,-27)

x intercept is when the graph =0 (y=0)

y intercept when x=0 then y= the constant c and where the graph cross the y axis

axis of symmetry is the x of the vertex: is a line about which a parabola is symmetrical and vertical when the axis of symmetric is vertical.

<h2>Why would someone want to factor a polynomial? Provide real world examples of different questions we can answer or facts we can determine from factoring a polynomial.</h2>

factor a polynomial helps us understand more about equations,factoring helps us rewrite the polynomial into simpler expression.

example from real life:

A homeowner has a back yard and wants to turn it to garden beds so he can plant his vegetables, he wants to fill it with dirt he needs 240 cubic feet to fill it the length is 4 feet than the width , and the height is 4

solve:

length=W+4

height=1/3 w

V=length* width* height

240=(w+4)(w)(4)

351= 4w²+16w

4w²+16w-240=0

take 4 as common factor

4(w²+4w-60)

now factorize:

4(w-6)(w+10)=0

<h2 />

3 0

4 years ago

What is this shape???

Alex17521 [72]

The answer to that one is A. Isosceles trapezoid

3 0

3 years ago

The combined math and verbal scores for females taking the SAT-I test are normally distributed with a mean of 900 and a standard

Genrish500 [490]

Answer:

50% of females do not satisfy that requirement

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 900, \sigma = 200$

If a college includes a minimum score of 900 among its requirements, what percentage of females do not satisfy that requirement

This is scores lower than 900, which is the pvalue of Z when X = 900.

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{900 - 900}{200}$

$Z = 0$

$Z = 0$ has a pvalue of 0.5

50% of females do not satisfy that requirement

7 0

3 years ago