Answer:
27, 20
Step-by-step explanation:
x + y = 47
x - y = 7
if we solve the second equation for 'x' we can:
let 'x' = y+7
substitute that expression for 'x' in the first equation to get:
y+7 + y = 47
2y = 40
y = 20
now find 'x':
x - 20 = 7
x = 27
Answer:
6 cm
Step-by-step explanation:
Area of a rectangle = length * width
Here, length and width are 12 cm and 3 cm, so
Area = 12*3 = 36 cm squared
Area of a square = side * side
36 = 6*6
Thus, side = 6 cm
-8 + 7y = - 18
7y =10
y =10/7
Substitute y = 10/7 into first equation
4x - 7 (10/7)=2
4x - 10 =2
4x = 12
x = 3
Thus, the solution is x = 3 and y = 10/7
30x^2
hope this helps u out!
Answer: 1 pigeon is $320
1 love bird is $80
Step-by-step explanation:
Let the cost for 1 love bird be represented by x
Let the cost for 1 pigeon be represented by y.
Since John bought 8 birds and 6 pigeons for $2400. This will be:
8x + 6y = 2400 ...... i
If he had bought 1 more pigeon and 2 fewer birds, he would have paid $200 more. This will be:
6x + 7y = 2600 ...... ii
8x + 6y = 2400 ...... i
6x + 7y = 2600 ...... ii
Multiply equation i by 6
Multiply equation ii by 8
48x + 36y = 14400 ...... iii
48x + 56y = 20800 ...... iv
Subtract iii from iv
20y = 6400
y = 6400/20
y = 320
1 pigeon is $320
From equation i
8x + 6y = 2400
8x + 6(320) = 2400
8x + 1920 = 2400
8x = 2400 - 1920
8x = 480
x = 480/8
x = 60
1 love bird is $80
