Answer:
44.5 minutes on her phone to stay within budget
Step-by-step explanation:
65.50-21.00 = 44.50
44.50x0.12 = 5.34
5.34 divided by 0.12 = 44.5
50% = 1/2
so 25,000 / 2 = 12,500
Answer:
8x³-27y³=3880
Step-by-step explanation:
2x-3y=10
xy=16
8x³-27y³=?
as we know that
(a-b)³=a³-b³-3ab(a-b)
now we substitue the formula according to our question
(2x-3y)³=(2x)³-(3y)³-3(2x)(3y)(2x-3y)
(10)³=8x³-27y³-18(16)(10)
1000=8x³-27y³-2880
1000+2880=8x³-27y³
3880=8x³-27y³
Answer:
-8
Step-by-step explanation:
First, simplifying a little, we can subtract 5 from both sides to get rid of the +5 on the left side:
-5⁄2 a + 5 = 25 -> -5/2 a = 20
Now, getting rid of the fraction, let's multiply both sides by 2:
-5/2 a = 20 -> -5a = 40
Finally, dividing both sides by -5 will isolate a, giving us the answer:
-5a = 40 -> a = -8
Edit: thanks for correction, sorry about that
