-t-3 and 3-t are not the same since t-3 would result in a negative answer since both -t and -3 are negative. While in t-3 t is positive and -3 is negative. it is wrong if its left as t-3 since -t-3=3-t is false.
Answer:
a)9261
b)166375
c)27543608
Step-by-step explanation:
21 x 21 x 21 = 9261
55 x 55 x 55 = 166375
302 x 302 x 302 = 27543608
Answer:
60
Step-by-step explanation:
Answer:
This week Beca will practice for 80 minutes for her 20 minutes piano lessons.
Step-by-step explanation:
Duration of Beca's practice for every 5 minutes lessons = 20 minutes
Duration of Beca's practice if she take 1 minute piano lesson:
So, duration of Beca's practice if she takes 20 minutes of piano lessons:
This week Beca will practice for 80 minutes for her 20 minutes piano lessons.
Answer:
u = 12, v= 15
Step-by-step explanation:
Given the system of simultaneous equation:
1/6 u− 1/3 v=−3... (1)
0.2u+0.1v=3.9...(2)
Rewriting both equation as fraction
1/6 u− 1/3 v=−3
1/5 u + 1/10 v = 39/10
Multiplying equation (1) by 6 and (2) by 10 we have:
u - 2v = -18... (3)
2u + v = 39...(4)
Using elimination method, we will first multiply equation (3) by 2 and (2) by 1 to have:
2u-4v = -36 ...(5)
2u+v = 39...(6)
Subtracting (5) from (6);
-4v-v = -36-39
-5v = -75
v = -75/-5
v = 15
Substituting v = 15 into equation (3) to get u we have:
u - 2(15) = -18
u - 30 = -18
u = -18+30
u = 12
The solution to the system of simultaneous equation are u = 12 and v = 15
