Don’t click the link, it doesn’t work
Multiply the first equation by 2:-
2y + 4.6 = 0.90x
2y - 0.90x = -4.6
second equation is
-2y - 4.2x = -7.8
Adding:-
-5.1x = -12.4
x = 2.4
-2y = -7.8 + 4.2(2.4) = 2.3
x = -1.2
Answer x = 2.4 and y = -1.2
Its choice A
Fifty-seven x thirty-one = one-thousand, seven-hundred and sixty seven. I just guessed and checked. 57x31=1767
Answer:
D
Step-by-step explanation:
+ =
64 + 225 = 289
289 = 289
Since + = the three side lengths represent a right triangle.