Please use " ^ " to denote exponentiation: <span>2x^2 + 3xy – 4y^2
Now let x=2 and y= -4:
2(2)^2 + 3(2)(-4) - 4(-4)^2 = 8 - 24 -4(16) = -16 - 4(16) = -5(16) = -80 (answer)</span>
Answer:
b 50:75
Step-by-step explanation:
2/5 *125+ 3/5*125
=50+75
Answer:
C. 3/4
Step-by-step explanation:
Using the SOH CAH TOA identity;
tan theta = opposite/adjacent
From the diagram
Opposite = x
Adjacent = 12
tan <B = x/12
Since cot <B = 1/tan <B
cot <B = 12/x
Get x using pythagoras theorem
x² = 20²-12²
x² = 400 -144
x² = 256
x = 16
Hence cot <B = 12/16
cot <B =3/4
Answer:
-28/9 I am deeply sorry if I am wrong
Step-by-step explanation: