Answer:
x=5
Step-by-step explanation:
For triangle A to be a scale model of triangle B, x must equal 5. This is because all side lengths must be reduced by the same ratio. In this case that ratio is 2.5. 12.5/2.5=5
Answer:
The sum of the values of Annikas 4 cards is -16
Answer:
B. (6,3)
Step-by-step explanation:
14x - 2y = 78
2x - 2y = 6
-2y/-2 = (6 - 2x)/-2
y = -3 + x
substitute this y in for the y of the first equation
14x - 2(-3+x) = 78
14x + 6 - 2x = 78
12x + 6 = 78
12x = 72: x = 6
use x to plug into 2nd equation to make life easier
y = -3 + (6)
y = 3
(6,3)
