Answer:Tiffany has 28 Justin has 64
Step-by-step explanation:
64+28=92
For six you can write 1/4 because there is 4 pennies and 1 represents each penny
for number 5 you can put 2/10 because there is 10 coins and 2 quarters
and for number 7 is that Bradley has 10 coins not 9 so it would be 1/10
Answer:
See below.
Step-by-step explanation:
(X,Y) 0=X and 0=Y if you plug in 0 for X and 0 for Y in Y=8X it will be 0=8(0). 8 times 0 is 0 which is the equation
Y - x - 3 = 0
y = x + 3
y = x^2 - x - 12
x + 3 = x^2 - x - 12
x^2 - x - 12 - x - 3 = 0
x^2 - 2x - 15 = 0
(x - 5)(x + 3) = 0
x - 5 = 0 y = x + 3
x = 5 y = 5 + 3
y = 8
x + 3 = 0 y = x + 3
x = -3 y = -3 + 3
y = 0
so ur solutions are : (5,8) and (-3,0)
