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Elena-2011 [213]
2 years ago
7

What is the domain of the functionf(x) = 2x + 1 when the range is{-2, 4, 7}?​

Mathematics
1 answer:
Naddika [18.5K]2 years ago
8 0

Answer:

the domain of the function are {-3/2, 3/2, 3}

Step-by-step explanation:

f(x)=2x+1

range=-2, 4, 7

f(x)=-2

or, 2x+1=-2

or, x=-3/2

f(x)=4

2x+1=4

or, x=3/2

f(x)=7

2x+1=7

or, x=3

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Simplify the expression. n+ 3(n + 1) = 0​
laila [671]

Answer:

n=-3/4

Step-by-step explanation:

4 0
2 years ago
The product of a number and 7, decreased by the number is equal to 42. Find the number.
evablogger [386]

7
this is the answer, its pretty simple. I'm not sure the mathematical procedures but if you plug in 7 you get 49. Then all you got to do is subtract by 7, because the question states the number is the same. So basically,
7(7) - 7 = 42

8 0
3 years ago
5/8 divided by 7/10 for the lowest fraction
o-na [289]

Answer:

5/8 ÷ 7/10 = 25/28

Uh i believe this is the lowest fraction it can go to

7 0
2 years ago
Read 2 more answers
If x = 1 is a common root of ax² +ax + 2 = 0 and x² + x + b = 0 , then ab =
vodka [1.7K]

Answer:

ab = 2

Step-by-step explanation:

Given equations

ax² +ax + 2 = 0

x² + x + b = 0

root of both the equation

x= 1

then we can plug in x = 1 in both the equation

ax² +ax + 2 = 0                        x² + x + b = 0

a*1² +a*1 + 2 = 0                        1² + 1 + b = 0

a +a + 2 = 0                                 1 + 1 + b = 0

2a + 2 = 0                                    2 + b = 0

2a = -  2                                         b = -2

a = -2/2 = -1

Thus,

a = -1

b = -2

a*b = -1*-2 = 2

ab = 2

6 0
2 years ago
Quadrilateral ABCD is dilated by a scale factor of 1 over 3 centered around (1, 2). Which statement is true about the dilation?
Sonbull [250]

<em>Note: Since you missed to add the figure. So, after a little research I am kind of able to find the figure and hence, assuming it as a reference. Hence, I am attaching the figure and solution of that figure is also visible in the same figure.</em> Please check the attached figure (a)

Answer:

Segment B'D' will be parallel to segment BD and will be shorter than segment BD. Please see the attached figure (a) for better understanding.

Step-by-step explanation:

As we know that there are certain rules when a quadrilateral is dilated by a certain scale centered around a certain point.

So,

Let suppose P(a, b) is the point.

The dilation rule by a scale factor of 1 over 3 or (1/3) centered around (1, 2) is

P(a, b) → P(\frac{x+2}{3}, \frac{y+4}{3})

Hence,

            A(1, 2) → A'(1, 2)

            B(2, 3) → B'(4/3, 7/3)

            C(4, 2) → C'(2, 2)

             D(2, 1) → D'(4/3, 5/3)

The attached figure show that if we draw the all these points in the coordinate plan i.e. A(1, 2), B(2, 3), C(4, 2), D(2, 1) and A'(1, 2), B'(4/3, 7/3), C'(2, 2), D'(4/3, 5/3), we can determine that Segment B'D' will be parallel to segment BD and will be shorter than segment BD.

<em>Keywords: dilation, quadrilateral, segment</em>

<em> Learn more about dilation from brainly.com/question/7569824</em>

<em> #learnwithBrainly</em>

7 0
3 years ago
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