Answer:
(x,y) = (3, 1/2)
Step-by-step explanation:
This pair of linear equations may be solved simultaneously by using the elimination method. This will involve ensuring that the coefficient of one of the unknown variables is the same in both equations..
To solve this, add the equations;
x + 2x + 2y - 2y = 4 + 5
3x = 9
x = 3
substitute the value of x into the first equation,
3 + 2y = 4
2y = 4 -3
2y = 1
y = 1/2
Answer:
first one
Step-by-step explanation:
Answer:
67 - 5 = 62
67+5 = 72
Step-by-step explanation:
the real life scenario has been described under this paragraph. take note that I used a number which when added to another number gives 72, and when I subtract this number from the other number, I also get 62
let's assume that a teacher carries out a study in his class and found out that 67percent of his students support indoor sporting activities, if there is an error of 5%, find the minimum and also the maximum percentage of students who are in favor of indoors sporting activities.
|x - 67| = 5
such that
x = 67 +-5
x = 67+5 = 72
x = 67-5 = 62
x= 62, x = 72
multiply the bracket by 2
-2x+18-x
Negative and Negative= positive
=-3x+18
Answer:A
Area = (5x + 4)(4x - 4)
= 20x^2 - 20x + 16x - 16
= 20x^2 - 4x - 16 Answer
Its G
