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fgiga [73]
2 years ago
10

Solve 4x - 7y ( x = 6, y = -4 ) *​

Mathematics
2 answers:
Likurg_2 [28]2 years ago
7 0

Answer:

52

Step-by-step explanation:

4(6) = 24 and -7(-4) = 28

28+24=52

Mashutka [201]2 years ago
5 0

4x-7y

4(6)-7(-4)     ↦ Substitute given coordinate points in the equation (x = 6 and y = 4.)

24-(-28)      ↦ Multiply the number.

24+28    ↦ Negative multiply Negative will always be positive.

52    ↦ Answer.

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Heather writes the equations below to represent two lines drawn on the coordinate plane. –6x + 18y = 0 4x – 12y = 20 After apply
dedylja [7]

Answer:

The equation has no solution; therefore, the system of equations has no solution

Step-by-step explanation:

we have

-6x+18y=0 -----> equation A

4x-12y=20 -----> equation B

we know that

If after applying the linear combination method, Heather arrived at the equation 0 = 60

then

The reason is because both lines are parallel, therefore the system of equations has no solutions

<u>Verify</u>

isolate the variable y in the equation A

18y=6x

y=(1/3)x --------> the slope is 1/3

isolate the variable y in the equation B

12y=4x-20

y=(1/3)x-(20/12)

y=(1/3)x-(5/3) --------> the slope is 1/3

Remember that

If the slopes are equal the lines are parallel

so

The system of equations has no solutions

6 0
3 years ago
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4x-9=6-x<br><br> Can someone please give step by step working out?
maxonik [38]

Answer:

= 3

Step-by-step explanation:

3 0
3 years ago
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Which would be used to solve this equation? Check all that apply.
barxatty [35]
Whats the equation ?
7 0
3 years ago
Mrs. Dugan plans to serve 100 barbecue sandwiches at the campany picnic. How many packages of barbecue buns will she need if bun
wel

Answer:

For packages of 8 =

Each package of Buns contain 8 pieces.

Therefore 100 barbecue will be contained in 100/8 = 12.5 packages

For packages of 12 =

Each package of Buns contain 12 pieces.

Therefore 100 barbecue will be contained in 100/12 = 8.3 packages

4 0
3 years ago
75 POINTS !!!!! URNGETNM EASY MATH PLEAS EIM CYRING I NEED NOW PLEAS ESOW ALL WORK AND EXPLAIN PLEASE
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Answer:

y = -2x +3\\\rule{150}{0.5}\\\text{Slope: -2}\\\text{Y-Intercept: 3}

Step-by-step explanation:

We would have to convert the standard equation into slope-intercept form.

======================================

<h3><u>Converting the equation into Slope-Intercept Form:</u></h3>

<u />8x + 4y = 12\\\rule{150}{0.5}\\8x - 8x + 4y = 12-8x\\\\4y = 12-8x\\\\4y = -8x + 12 \leftarrow \text{I switched the order on the right side.}\\\\\frac{4y=-8x+12}{4}\\\\\boxed{y = -2x + 3}

======================================

<h3><u>Identifying the Slope and Y-Intercept:</u></h3>

<em>General slope-intercept form is: </em>

<em></em>y=mx + b\\\rule{150}{0.5}\\\text{m - Slope}\\\text{b - Y-Intercept}

<u />

In the equation y = -2x + 3,  '-2' would be the slope since it is in 'm's place, and '3' would be the y-intercept since it's in 'b's place.

<em>Therefore:</em>

<em></em>\text{In } y=-2x+3\text{...}\\\rule{150}{0.5}\\\text{Slope: -2}\\\text{Y-Intercept: 3}<em></em>

======================================

<em>Hope this helps!</em>

7 0
2 years ago
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