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sukhopar [10]
3 years ago
11

Simplify: -2x(3 - 5x)

Mathematics
2 answers:
AnnyKZ [126]3 years ago
4 0

Answer:

-6x+10x^2

Step-by-step explanation:

you just have to distribute the -2x to the numbers inside the parenthesis.

hope this helps

Lemur [1.5K]3 years ago
3 0

Answer:

10x² - 6x

Step-by-step explanation:

-2x(3 - 5x)

={(-2x) . 3} - {(-2x) . 5x}

=-6x - (-10x²)

=-6x + 10x²        [negative plus negative=positive]

=10x² - 6x

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4. The diagram at right shows the graph of 3x + 4y = 12. The shaded figure is a square, three of whose vertices are on the coord
nikklg [1K]

Remark

This is a very interesting question.  Draw a line from the origin to where the upper right vertex of the square touches the line. That line has the property that the its equation is y = x. So the "solution" to the point of intersection is the solution of the two equations.

y =  x            (1)

3x + 4y = 12 (2)

Put x in for y in equation 2

3x + 4x = 12

7x = 12

x = 12/7

x = 1.714

y = 1.714

Problem A

<em><u>x intercept</u></em>

The x intercept occurs when y = 0

3x + 4(0) = 12

3x = 12                Divide by 3

x = 12/3

x = 4

the x intercept = (4,0)

<em><u>y intercept</u></em>

The y intercept occurs when x =0

3(0) + 4y = 12

4y = 12

y = 12/4

y = 3

y intercept = (0,3)

Problem B

x and y both equal 1.714 so they are also the length of the square's side.

Problem C

See solution above. x =y is the key fact.

x = y = 1.714

5 0
3 years ago
Y=3×+7 y=×-9 what is the solution of the equation
Aneli [31]

Since both equations are equal to y you can just make them equal to each other, like this 3x + 7 = x - 9. From there isolate the varible x on one side so that the solution will be on the other side of the equation. I'll do the steps too for you.

3x + 7 = x - 9

2x + 7 = -9

2x = -16

x = -8

Hope this helps :)

7 0
3 years ago
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The answer is 5 since the total is 7 and you already have 2
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1 year ago
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Solve the proportions
DanielleElmas [232]

Do cross multiply or butterfly.   For example first one. 18/x=6/10  So cross multiply  18×10 =6x 180=6x Divide both sides by 6 to get x alone 180÷6=30 So x =30  Do the same to rest

4 0
3 years ago
Solve the system of equations by substitution. Show all work neatly on your work page. Checking your answer is wise. :) Plz need
vivado [14]

Answer: x = 1

3x + 4 = 7

subtract 4 from both sides

3x = 3

x = 3/3 = 1

7 0
3 years ago
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