2 years ago

3(2x-5)=21 What is x?

Mathematics

2 answers:

Oduvanchick [21]2 years ago

8 0

You would solve a problem like this:

3(2x-5)=21

6x-15=21... I multiplied 2x and -5 by 3

6x-15=21

6x-15+15=21+15... I added 15 to both sides so 6x can be alone

6x=36

6x/6=36/6... I divided by 6 from both sides to leave x alone to get the answer:

x=6.

Alexxx [7]2 years ago

7 0

X=6 is your answer .-.

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Kruka [31]

The answer for this is 4

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3 years ago

Which equation represents a parabola that opens upward has a minimum at x=3 and has a line of symmetry at x=3

umka2103 [35]

Answer:

$y=x^2-6x+5$

Step-by-step explanation:

Let us consider the equation $y=x^2-6x+5$

For a quadratic equation in a standard form, $y=ax^2+bx+c$ , the axis of symmetry is the vertical line $x = \frac{-b}{2a}$ .

Here in this case we have, $a=1, b=-6 , c =5$

Putting the values we get,

$x = \frac{-(-6)}{2\times 1} = \frac{6}{2} =3$

We can see that the axis of symmetry is x=3 and the graph is giving minimum at x=3.

Therefore, the required equation is $y=x^2-6x+5$ . Refer the image attached.

4 0

2 years ago

Read 2 more answers

A rectangle that has a width of 18 inches and a length of 36 inches has a diagonal of 43 inches. True or false

astra-53 [7]

Answer:

fals it is smaller than that

4 0

3 years ago

The length of a rectangular plot is 6m less than thrice its breath. Find the dimensions of the plot if its perimeter is 148m.

Elena-2011 [213]

length of a rectangle is 6 less than 3 times its width"

L = 3W-6

"perimeter of the rectangle is 148 meters"

2L + 2W = 148

L + W = 74

(3W-6) + W = 74

4W = 80

W = 20 m

L = 3W-6 = 54 m

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3 years ago

Multiply the sum “n+25” by 3/5

Mars2501 [29]

Answer:

Step-by-step explanation:

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3 years ago