Superman2934
09.09.2019 •
Mathematics
Atriangle has sides of lengths 12, 14, and 19. is it a right triangle? explain.
yes; 122 + 142 192
yes; 122 +142 = 192
no; 122 +142 + 192
no; 122 +142 = 192
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Ответ:
The correct option is (c).
Step-by-step explanation:
Let x and y denote the cost of game 1 and game 2 respectively.
ATQ,
4x+6y = 18 (1)
5x + 5y = 20 (2)
Multiply equation (1) by 5 and equation (2) by 4.
20x+30y = 90 (3)
20x + 20y = 80 (4)
Subtracting equation (3) and (4)
20x+30y - (20x + 20y) = 90-80
20x-20x+30y-20y = 10
10y = 10
y = 1
Put the value of y in equation (1).
4x+6(1) = 18
4x = 18-6
4x = 12
x = 3
Hence, the cost of game 1 is $3.00