Answer:
9.6 x 10^7
Step-by-step explanation:
Atlantic Ocean = 3.2 x 10^7 = 32,000,000 square miles.
Pacific Ocean = 6.4 x 10^7 = 64,000,000 square miles.
Together they cover 96000000 square miles. Turn it back into standard form(scientific notation). 9.6 x 10^7.
So try to isolate a by division and such
K=4a+9ab
we use reverse dstributive which is ab+ac=a(b+c) so
undistribute a
4a+9ab=a(4+9b)
k=a(4+9b)
divide both sides by (4+9b)
=a
a=
3) 0.5(12m-22n)=0.5(12m)-0.5(22n)
=6m-11n
4) 2/3(18x+6z) =2/3(18x)-2/3(6z)
=12x-4z
5)2x+12=2(x+6)
6)12x+24=12(x+2)
Answer:
The faster train goes 60mph
Step-by-step explanation:
s= speed
s+20 is the faster train.
Then you are given:
200/s+s+20=2
200=2*(2s+20)
4s+40=200
4s=160
s=40 is the slower train
40+20= speed of faster one
s=60 ;)
Ok so what we have to do is 4+7+9=c
4+7=11
11+9=20
c=20
your answer is 20
