Answer:
20cm^2
Step-by-step explanation:
0.5x(7+3)x4=20cm^2
Answer:
first option is the correct answer
Step-by-step explanation:
v + w = (-9+1,2-6)
= (-8,-4)
Adding what rational expressions?
Answer:
x=-4, y=7
Step-by-step explanation:
According to the first equation, y = -4x - 9, so we can substitute y in the second equation for -4x - 9.
y = 3x + 19
-4x - 9 = 3x + 19
Add 9 to both sides
-4x = 3x + 28
Subtract 3x
-7x = 28
Divide by -7
x = -4
Plugging this into the equation, we have:
y = -4x - 9
y = -4(-4) - 9
y = 16 - 9
y = 7
