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alexgriva [62]
3 years ago
8

Find the set of values of x for which y is zero inthe equation y=(x + 2) (2x-2)​

Mathematics
1 answer:
Alex777 [14]3 years ago
8 0

Answer:

{ - 2, 1 }

Step-by-step explanation:

To determine the values let y = 0, that is

(x + 2)(2x - 2) = 0 ← in standard form

Equate each factor to zero and solve for x

x + 2 = 0 ⇒ x = - 2

2x - 2 = 0 ⇒ 2x = 2 ⇒ x = 1

The set of values are { - 2, 1 }

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Five less than 4 times a number equals 2 more than 3 times the number.
laila [671]
A. 
4n-5 = 3n+2

b and c.
add 5 to both sides:
4n = 3n+7
subtract 3n from both sides:
n = 7
5 0
3 years ago
Read 2 more answers
Which set of ordered pairs does not represent a function? { ( − 3 , − 1 ) , ( 8 , − 1 ) , ( 0 , − 5 ) , ( − 9 , − 2 ) } {(−3,−1)
inysia [295]

Answer:

\{(2,8),(2,1),(-9,-5),(-8,9)\} is not a function

Step-by-step explanation:

Given

\{(-3,-1),(8,-1),(0,-5),(-9,-2)\}

\{(5,9),(-3,-5),(0,4),(-9,9)\}

\{(9,0),(-5,4),(5,0),(6,3)\}

\{(2,8),(2,1),(-9,-5),(-8,9)\}

Required

Which is not a function

A function is of the form (x,y)

Assume a function is:

\{(x_1,y_1),(x_2,y_2),(x_3,y_3).....,(x_n,y_n)\}

In simple terms:

For an ordered pair to be regarded as a function, no x value must be repeated

Analyzing the options:

1. \{(-3,-1),(8,-1),(0,-5),(-9,-2)\}

This is a function because none of the x values (-3, 8, 0 and -9) appeared more than once

2. \{(5,9),(-3,-5),(0,4),(-9,9)\}

This is a function because none of the x values (5, -3, 0 and -9) appeared more than once

3. \{(9,0),(-5,4),(5,0),(6,3)\}

This is a function because none of the x values (9, -5, 5 and 6) appeared more than once

4. \{(2,8),(2,1),(-9,-5),(-8,9)\}

This is not a function because one of the x values (2) appeared more than once.

i.e.

(2,8)   and   (2,1)

7 0
3 years ago
a theater can seat 391 people .the number of rows is 6 less than the number of seats in each row.how many rows of seats are ther
Tema [17]
X(x-6) = 391
x2-6x-391 =0(x-23)(x+17)=0

since the number of seats should be positive,

x = 23

The number of rows is 23 - 6 = 17



( To check our work )

391 / 17 = 23

So, there are 17 rows of seats.
6 0
3 years ago
What is the answer wil mark brainleist and report those who put random answers 30 points
GenaCL600 [577]

Answer: 92 ft

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The function f(x) contains the point (-2,4), which point is contained in f -1(x)? A. (-4,2) B. (-2,-4) C. (4,-2) D. (2,-4)
gregori [183]

9514 1404 393

Answer:

  (4, -2)

Step-by-step explanation:

If (x, y) is part of the relation f, then (y, x) will be in the inverse relation f^-1.

The point contained in f^-1(x) is (4, -2).

_____

<em>Additional comment</em>

The range of f is {2, -4, -2, -4}, which has -4 repeated. That means <em>the inverse relation is not a function</em>. We can say that (4, -2) is a point contained in the inverse relation, but we cannot say that f^-1(x) is a function.

6 0
3 years ago
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