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Masja [62]
3 years ago
8

HALP ME PLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS

Mathematics
1 answer:
Ne4ueva [31]3 years ago
4 0

Answer:

x = -\frac{1}{3}, y = 2

Step-by-step explanation:

3x + 3y - 7 = 12x + y

6y - 12x - 1 = -45x

(3x - 12x) + (3y - y) = 7

(-12x + 45x) + 6y = 1

-3(-9x + 2y = 7)

33x + 6y = 1

27x - 6y = -21

33x + 6y = 1

60x = -20 -> x = -20/60 = -1/3

-9x + 2y = 7 -> y = \frac{7+9x}{2} = \frac{7+9*-\frac{1}{3}}{2} = 2

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Write an equation in slope-intercept form from the points (0, 3) and (-4,-1)
Bezzdna [24]

Answer:

y = x + 3

Step-by-step explanation:

Slope-intercept form is represented by the formula y = mx + b. We can write an equation in point-slope form first, then convert it to that form.

1) First, find the slope of the line. Use the slope formula  m = \frac{y_2-y_1}{x_2-x_1} and substitute the x and y values of the given points into it. Then, simplify to find the slope, or m:

m = \frac{(-1)-(3)}{(-4)-(0)} \\m = \frac{-1-3}{-4-0} \\m = \frac{-4}{-4} \\m = 1

Thus, the slope of the line must be 1.

2) Now, since we know a point the line intersects and its slope, use the point-slope formula y-y_1=m(x-x_1) and substitute values for m, x_1, and y_1. From there, we can convert the equation into slope-intercept form.

Since m represents the slope, substitute 1 in its place. Since x_1 and y_1 represent the x and y values of a point the line intersects, choose any one of the given points (either one is fine) and substitute its x and y values into the equation, too. (I chose (0,3).) Finally, isolate y to find the answer:

y-3=1(x-0)\\y-3 = x\\y = x + 3

8 0
3 years ago
I’m giving the brainliest Which equation can you use to find the value of x
Katyanochek1 [597]

Answer:

3x=78+(x-2)

Step-by-step explanation:

The exterior angle is equal to the sum of the opposite interior angles.

3x=78+(x-2)

4 0
3 years ago
Read 2 more answers
Find the measure of the angle indicated in bold
vova2212 [387]

Answer:

60 for both

Step-by-step explanation:

Since these angles are parallel, they are equal to each other :

6x = 5x + 10

Subtracting 5x from both sides gives us :

x = 10

Substituting this value back into both angles gives us

6x = 60

5x+10 = 60

8 0
2 years ago
Given a cube with a volume of 27cm3, what is the volume of a square pyramid?
VashaNatasha [74]

First from the information we have, we see that the volume of the cube is 27cm3. So what are the dimensions of its length, width and height? This information will help us to determine the dimensions of the square pyramid.


Volume of a cube is found from the formula  V = a3


Where V is volume, and a is the length of one side.


We expand this equation to be:


V= a * a * a


Since all sides of a cube are equal, then this equation will be:


27 = 3 * 3 * 3


Now we know the length width and height of the cube.


Volume of a  square pyramid is given by the formula V =1/3ah


Where V is the volume, a is the area of the base of the pyramid, h is the height of the pyramid.


Since it fits perfectly into the cube, then its dimensions are the same as the cube, so:


Area of the base is Length * Width so:


a = 3 * 3 = 9


and height:


h = 3


Now therefore:


 V =  1/3 * 9 * 3


V = 1/3 * 27


V = 27/3


V = 9 cm3


Read more on Brainly.com - brainly.com/question/11049932

5 0
4 years ago
Trisha is taking care of the Han family's dogs.The Hans leave 7 cans of dog food for the 3days they'll be away.How much food wil
Verdich [7]

Answer:

2 1/3 food

Step-by-step explanation:

Cans of dog food = 7

Number of days = 3

If Trisha feeds them an equal amount each day, then each day the dogs will get:

\frac{7}{3}=2\frac{1}{3} food

7 0
3 years ago
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