Answer:
c
Step-by-step explanation:
The answer is C the 3rd answer choice
Answer:
x = -2i, 2i
Step-by-step explanation:
x² + 4 = 0
-4 -4
x² = -4
x = 2i, -2i
I hope this helps!
Answer:
x = -2, y = -9
Step-by-step explanation:
You can substitute the value of y into y. The first equation shows that y is equal to 4x -1, so we can switch this with the y in the second equation.
y = 2x -5 will become
4x - 1 = 2x - 5
Add 5 to both sides
4x + 4 = 2x
Subtract 4x from both sides
4 = -2x
Divide both sides by -2
-2 = x
Now we plug this number into an equation to find y.
y = 4x - 1 becomes
y = 4(-2) - 1
Simplifying it, we have:
y = -8 - 1
y = -9
S = 2(LW +H(L +W))
= 2(2.2*3.0 +7.5(2.2 +3.0))
= 2(6.6 +7.5*5.2)
= 91.2 . . . . cm²
The appropriate choice is
4) 91.2
