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NemiM [27]
3 years ago
14

Find the value of x for the following equivalent functions: f(x)=2x^2−3x+4 and f(x)=2x^2−1

Mathematics
1 answer:
masha68 [24]3 years ago
3 0
A) y = 2x – 7  and f(x) = 7 – 2xIncorrect. These equations look similar but are not the same. The first has a slope of 2 and a y-intercept of −7. The second function has a slope of −2 and a y-intercept of 7. It slopes in the opposite direction. They do not produce the same graph, so they are not the same function. The correct answer is f(x) = 3x2 + 5 and y = 3x2 + 5. B) 3x = y – 2  and f(x) = 3x – 2Incorrect. These equations represent two different functions. If you rewrite the first equation in terms of y, you’ll find the equation of the function is y = 3x + 2. The correct answer is f(x) = 3x2 + 5 and y = 3x2 + 5. C) f(x) = 3x2 + 5 and y = 3x2 + 5Correct. The expressions that follow f(x) = and y = are the same, so these are two different ways to write the same function: f(x) = 3x2 + 5 and y = 3x2 + 5. D) None of the aboveIncorrect. Look at the expressions that follow f(x) = and y =. If the expressions are the same, then the equations represent the same exact function. The correct answer is f(x) = 3x2 + 5 and y = 3x2 + 5.
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Graph the functions on the same coordinate axis. {f(x)=−2x+1g(x)=x2−2x−3
NikAS [45]

Answer:

(2,-3) and (-2,5)

Step-by-step explanation:

Let us graph the two equations one by one.

1. f(x)=-2x+1

If we compare this equation with the slope intercept form of a line which is given as

y=mx+c

we see that m = -1 and c =1

Hence the slope of the line is -2 and the y intercept is 1. Hence one point through which it is passing is (0,1) .

Let us find another point by putting x = 1 and solving it for y

y=-2(1)+1

y=-2+1 = -1

Let us find another point by putting x = 2 and solving it for y

y=-2(2)+1

y=-4+1 = -3

Hence the another point will be (2,-3)

Let us find another point by putting x = -2 and solving it for y

y=-2(-2)+1

y=+1 = 5

Hence the another point will be (-2,5)

Now we have two points (0,1) ,(1,-1) ,  (2,-3) and (-2,5) we joint them on line to obtain our line  

2.

g(x)=y=x^2-2x-3

y=x^2-2x+1-1-3

y=(x-1)^2-4

(y+4)=(x-1)^2

It represents the parabola opening upward with vertices (1,-4)

Let us mark few coordinates so that we may graph the parabola.

i) x=0 ; y=y=(0)^2-2(0)-3=0-0-3=-3 ; (0,-3)

ii)x=-1 ; y=(-1)^2-2(-1)-3=1+2-3=0 ; (-1,0)

iii) x=2 ; y=(2)^2-2(2)-3 = 4-4-3 =-3 ;(2,-3)

iii) x=1 ; y=(1)^2-2(1)-3 = 1-2-3 =-4  ;(1,-4)

iii) x=-2 ; y=(-2)^2-2(-2)-3 = 4+4-3 =5  ;(-2,5)

Now we plot them on coordinate axis and line them to form our parabola

When we plot them we see that we have two coordinates (2,-3) and (-2,5) are common , on which our graphs are intersecting. These coordinates are solution to the two graphs.

3 0
4 years ago
Jack and Jill each bought 100 pounds of cashews. Jack divided his cashews into 23 equal amounts and put them in paper bags. Jill
sladkih [1.3K]

Answer: Jack

Step-by-step explanation:

100÷2=50

50÷23=2.1739130435

50÷18=2.7777.....8

3 0
3 years ago
The table shows the number of tacos that Taco Bus sold in 4 months.
Mademuasel [1]

Answer:

Step-by-step explanation:

A: Correct

June + August > July

12,832 + 8,465 > 20,005

21,297 > 20,005

B: Wrong

July = June + 8,173

20,005 = 12,832 + 8,173

20,005 ≠ 21005

C: Correct

July + August > May + June

20,005 + 8,465 > 9,325 + 12,832

28470 > 22157

D: Wrong

9,325 +12,832 +20,005 + 8,465 = 50627

E: Correct

May + June = 22,157

9,325 + 12,832 = 22,157

22,157 = 22,157

Part B: 2215

July - May + August = ?

20,005 - 9,325 + 8,465 = ?

20,005 - 17790 = 2215

6 0
3 years ago
You have solved a system of equations by substitution and got one solution. How were you able to determine it was one solution?
sergeinik [125]

Answer: the variable can not be replaced by any other number

Step-by-step explanation:

7 0
3 years ago
State whether the given set of angles form a triangle. Select all that apply.
Rainbow [258]

\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}

Actually Welcome to the concept of Angle sum property of a triangle.

To form a triangle, all angles must sum exactly to 180°.

So the correct options are :-

1.) 86°, 53°, 41°

4.) 54°, 97° , 29°

5.) 33° , 90° , 57°

6 0
3 years ago
Read 2 more answers
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