6x-7. It is this one because it says 7 less than which is -7. It also says 6 times the length of x which is 6x.
Answer:
see explanation
Step-by-step explanation:
given x² - 6x - 21 = 0 ( add 21 to both sides )
x² - 6x = 21
to complete the square
• add ( half the coefficient of the x-term)² to both sides
x² + 2 (- 3)x +9 = 21 + 9
(x - 3)² = 30 ( take the square root of both sides )
x - 3 = ±
( add 3 to both sides )
x = 3 ± 
x = 3 -
= - 2.48 ( to 2 dec. places ) or
x = 3 +
= 8.48 ( to 2 dec. places )
We need a picture of the graph
Answer:
g12. 85 + b4. 79
Step-by-step explanation:
g and b is just the amount she buys
Answer:209.84 - 20.00 = 189.84 / 2 = 94.92
94.92 + 20.00 = 114.92 Eva spent and Martha spent $94.92
Step-by-step explanation: