Option( d ) is the correct one.
Answer:
C
Step-by-step explanation:
6(a+b) + 2z = -8 ; divide by 2
3(a+b) + z = -4
a+b+z = 2; subtract z from both sides
a+b = 2-z; substitute a+b into equation 3(a+b) +z = -4
3(2-z) +z = -4; distribute
6 - 3z+ z= -4 ; subtract 6 on both sides
-3z + z = -4 -6 ; combine like terms
-2z = -10; divide both sides by -2
z= 5
3(a+b) +z = -4; substitute z by 5
3(a+b) +5 = -4; subtract 5 from both sides
3( a+b) = -4 -5; combine like terms
3(a+b) = -9; divide both sides by 3
(a+b) = -3
Is there a picture that goes along with this question.
21.20 would be the total with tax
the taxes would equal $1.20
Honestly to explain it I put it into a calculator.. sorry :)
I put in 6% of 20 then add it to the $20
Answer:
x=0
Step-by-step explanation:
in the quadratic formula to only have one solution
for 
so we have
if we insert in the formula we have
since a≠0
