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Nastasia [14]
3 years ago
13

Solve each equation by graphing. Round to the nearest tenth. X^2+9=-10x

Mathematics
1 answer:
Lady_Fox [76]3 years ago
6 0
I hope this helps you

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As a first step in solving the system shown, Yumiko multiplies both sides of the equation 2x – 3y = 12 by 6. By what factor shou
GenaCL600 [577]

Answer:

Yumiko should multiply the other equation by 3.

If she adds the two equations she would be left with the variable 'x'.

Step-by-step explanation:

Given the two equations are as follows:

$ 2x - 3y = 12 \hspace{5mm} \hdots (1) $

$ 5x + 6y = 18 \hspace{5mm} \hdots (2) $

It is given that she multiplies the first equation by 6. Therefore, (1) becomes

$ 12x - 18y = 72 \hspace{15mm} \hdots (a) $

Now, note that the sign of the variable 'y' is negative. So, if we make the co-effecient of 'y' equal in both the cases, add them it would result in the elimination of the variable 'y'.

The co-effecient of y in Equation (2) is 6. To make it 18 like it is in Equation (1), we multiply throughout by 3.

Therefore, Equation (2) becomes:

$ 15x + 18y = 54 \hspace{5mm} \hdots (b) $

Now, we add Equation (a) and Equation (b).

$ \implies 12x - 18y + 15x + 18y = 72 + 54 $

$ \implies 27x = 126 $

Factor: 3

Equation: 27x = 126

7 0
2 years ago
24 students brought her permission slips to attend the class field trip is this represent at 8:10 to the class how many students
OlgaM077 [116]

Answer:

30 students

Step-by-step explanation:

24 over 80 is equal to x over 100

cross multiply and you get

80x =240

divide 80 on both sides

you get 3

add an extra sero

4 0
3 years ago
Someone please solve & explain
den301095 [7]

Answer:

y+20 = 9(x+2)

Step-by-step explanation:

The slope that passes through the points is

m = (y2-y1)/(x2-x1)

    = (79- -20)/ (9--2)

    = (79+20)/(9+2)

     = 99/11

     = 9

We can use point slope form to write an equation.  It says to use the first point.

y-y1 = m(x-x1)

y--20 = 9(x--2)

y+20 = 9(x+2)


7 0
3 years ago
What is an equation of the line that passes through the points (-6, -5) and (-3,0)? Put your answer in fully reduced form.​
MrMuchimi

Answer:

  y = 5/3x +5

Step-by-step explanation:

The two-point form of the equation of a line is useful here.

  y = (y2 -y1)/(x2 -x1)(x -x1) +y1

  y = (0 -(-5))/(-3 -(-6))(x -(-6)) -5

  y = 5/3(x +6) -5

  y = 5/3x +5 . . . . slope-intercept form

  5x -3y = -15 . . . .standard form

_____

There is no "fully reduced" form of the equation of a line. There are slope-intercept form, point-slope form, two-point form, standard form, general form, intercept form, and some others. We assume that "fully reduced" applies to any fractions in the equation. The "slope-intercept" form has a fraction, so perhaps that's the form that is required.

6 0
2 years ago
Todd is buying material to fence his new garden. He buys 2 strands of barbed wire and a post for every 3m of fence. Each post co
VikaD [51]

fence material 268 is your answer..

7 0
2 years ago
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