Answer:
12
Step-by-step explanation:
x-4=2(x+8)/5
let's do my favorite strategy: distributive property!
x-4=(2x+16)/5
Now we can simplify.
x-4=(2/5)x+16/5
Let's solve for x!
Subtract 2/5 from both sides
3/5)x=36/5
Now multiply both sides by 5/3, the reciprocal.
You would get 12 as x!
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 )
Answer this in 2 steps:
1) Solve 3x+y=4 for y: 3x+y=4 becomes 3x-3x+y=4-3x, or y = -3x + 4.
1
2) Find the reciprocal of this result: 1/y = --------------
-3x + 4
To solve this problem, all we need to do is multiply the amount charged for each carton by the amount of cartons that Bob shipped.
28 * 3300 = 92400
Bob earned $92,400 in sales from the gift cartons.
Hope that helped! =)
Answer:
325 centimeters
Step-by-step explanation: