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klasskru [66]
3 years ago
6

Solve this system of linear equations. separate the x- and y- values with a coma. -12x=-75-11y

Mathematics
1 answer:
ycow [4]3 years ago
4 0
Solve the following system:
{-12 x = -11 y - 75 | (equation 1)
{-5 x = -11 y - 89 | (equation 2)
Express the system in standard form:
{-(12 x) + 11 y = -75 | (equation 1)
{-(5 x) + 11 y = -89 | (equation 2)
Subtract 5/12 × (equation 1) from equation 2:
{-(12 x) + 11 y = -75 | (equation 1)
{0 x+(77 y)/12 = (-231)/4 | (equation 2)
Multiply equation 2 by 12/77:
{-(12 x) + 11 y = -75 | (equation 1)
{0 x+y = -9 | (equation 2)
Subtract 11 × (equation 2) from equation 1:
{-(12 x)+0 y = 24 | (equation 1)
{0 x+y = -9 | (equation 2)

Divide equation 1 by -12:
{x+0 y = -2 | (equation 1)
{0 x+y = -9 | (equation 2)
Collect results:
Answer:  {x = -2                {y = -9

please note that the parentheses "{" should span over both equations but the editor doesn't allow that so I should it on both line, See attached example.










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Suppose you work for a large coffee distributor that has a secret coffee blend it sells to local stores. You mix the Gazebo blen
user100 [1]

Answer:

18lbs of Mexican Shade Grown coffee

Step-by-step explanation:

Since this is a ratio problem and we are given three values and one variable x (pounds of Mexican Shade Grown coffee needed) we can use the Rule of Three to solve this problem. In this rule we simply multiply the diagonal available values and divide by the third value to get the value of the variable, like so...

90lbs Gazebo  <=====>   27lbs Mexican Blend

60lbs Gazebo  <=====>   x lbs Mexican Blend

(60 * 27) / 90 = x

1620 / 90 = x

18 lbs = x

We need 18lbs of Mexican Shade Grown coffee blend to mix with the 60lbs of Gazebo blend

7 0
3 years ago
How can I get the median when the amount of number are 8???
Dafna11 [192]
Then, the median is found by taking the mean (or average) of the two middle most numbers. 
7 0
3 years ago
Read 2 more answers
Help please thank you
butalik [34]
A - 2x^2 + 2x - 2

To find this, set up the equation:

(-x^2 + 6x - 1) + ( 3x^2 - 4x - 1)

With this, you need to combine like terms while taking into consideration the addition sign.

-x^2 + 3x^2 = 2x^2
6x + - 4x = 2x
- 1 + - 1 = - 2

Hope this helps!




7 0
3 years ago
find the interest on a loan of $2500 that is borrowed at 9% for 7 month how much are you going to owe total
Keith_Richards [23]
9% of $2500 = 225
7 × 225 + 2500 = $4075
5 0
3 years ago
How do I find the answer for (9^2x-3^2x-6)?
Inga [223]
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8 0
3 years ago
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