-6x + 9y = 21 . . . (1)
10x - 3y = -23 . . . (2)
(2) x 3 => 30x - 9y = -69 . . . (3)
(1) + (3) => 24x = -48 => x = -48/24 = -2
From (1), -6(-2) + 9y = 21 => 9y = 21 - 12 = 9 => y = 9/9 = 1
Threfoe, x = -2 and y = 1
Answer
Find out the ratio represented the number of yellow balls to red balls .
To proof
Let us assume that the number of yellow balls be x.
As given
There are 20 balls in a bag.
Ten of the balls are red, 4 are green, and the rest are yellow.
than the equation becomes
x + 10 + 4 = 20
x = 20 - 14
x = 6
therefore the number of yellow balls be 6 .
Now find out the ratio between the the number of yellow balls to red balls .
the number of yellow balls be 6 .
the number of red balls be 10 .
solving
Therefore the ratio of the the number of yellow balls to red balls is 3 :5 .
Option (d) is correct .
Hence proved
1 ton is equal to 2,000 pounds so 18 times 2,000 = 36,000 pounds. So, no they are equal.
Answer:
3/10
Step-by-step explanation:
get a common denominator and then subtract
Answer:
The correct sequence of operation is multiply each side by (-3), add 15 to each side.
Therefore, option (B) is the correct answer.
Step-by-step explanation:
Multiply each side by -3
Adding 15 to both sides
x = 27.
So, the correct sequence of operation is multiply each side by (-3), add 15 to each side.
Therefore, option (B) is the correct answer.