0.4(5+2x)-0.5=3(0.3x+0.7)
2 + .8x - 0.5 = .9x + 2.1 combine like terms
1.5 + .8x = .9x + 2.1 subtract 1.5, .9x from both sides
-.1x = .6 divide both sides by -.1
x = -6
Solve for x: 0.4 (2 x+5)-0.5 = 3 (0.3 x+0.7) 0.4 (2 x+5) = 0.8 x+2.: 0.8 x+2.-0.5 = 3 (0.3 x+0.7) Add like terms. 2.-0.5 = 1.5: 0.8 x+1.5 = 3 (0.3 x+0.7) Expand out terms of the right hand side: 0.8 x+1.5 = 0.9 x+2.1 Subtract 0.9 x from both sides: (0.8 x-0.9 x)+1.5 = (0.9 x-0.9 x)+2.1 0.8 x-0.9 x = -0.1 x: -0.1 x+1.5 = (0.9 x-0.9 x)+2.1 0.9 x-0.9 x = 0: 1.5-0.1 x = 2.1 Subtract 1.5 from both sides: (1.5-1.5)-0.1 x = 2.1-1.5 1.5-1.5 = 0: -0.1 x = 2.1-1.5 2.1-1.5 = 0.6: -0.1 x = 0.6 Divide both sides of -0.1 x = 0.6 by -0.1: (-0.1 x)/(-0.1) = 0.6/(-0.1) (-0.1)/(-0.1) = 1: x = 0.6/(-0.1) 0.6/(-0.1) = -6.: Answer: | | x = -6.
f(x)= -2x + 2 g(x)= x^3 + x
g(-3) = (-3)^3 + (-3) = -27 - 3 = -30
So
f(g(-3) ) = f (-30) = -2(-30) + 2 = 60 + 2 = 62
2. Alarm clock
1. Sunglasses
3. Shadow
nver
1/3h-4(2/3h-3)=2/3h-6
1/3h-8/3h+12=2/3h-6
-7/3h+12=2/3h-6
12=9/3h-6
18=3h
h=6
1000/10 = 100
or
10/1000 = 0.01
Solve for h: h/3-4 ((2 h)/3-3) = (2 h)/3-6 Put each term in (2 h)/3-3 over the common denominator 3: (2 h)/3-3 = (2 h)/3-(9)/3: h/3-4(2 h)/3-(9)/3 = (2 h)/3-6 (2 h)/3-(9)/3 = (2 h-9)/3: h/3-4(2 h-9)/3 = (2 h)/3-6 h/3-(4 (2 h-9))/3 = (h-4 (2 h-9))/3: (h-4 (2 h-9))/3 = (2 h)/3-6 -4 (2 h-9) = 36-8 h: (h+36-8 h)/3 = (2 h)/3-6 h-8 h = -7 h: (-7 h+36)/3 = (2 h)/3-6 Put each term in (2 h)/3-6 over the common denominator 3: (2 h)/3-6 = (2 h)/3-(18)/3: (36-7 h)/3 = (2 h)/3-(18)/3 (2 h)/3-(18)/3 = (2 h-18)/3: (36-7 h)/3 = (2 h-18)/3 Multiply both sides by 3: 36-7 h = 2 h-18 Subtract 2 h from both sides: 36+(-7 h-2 h) = (2 h-2 h)-18 -7 h-2 h = -9 h: -9 h+36 = (2 h-2 h)-18 2 h-2 h = 0: 36-9 h = -18 Subtract 36 from both sides: (36-36)-9 h = -18-36 36-36 = 0: -9 h = -18-36 -18-36 = -54: -9 h = -54 Divide both sides of -9 h = -54 by -9: (-9 h)/(-9) = (-54)/(-9) (-9)/(-9) = 1: h = (-54)/(-9) The gcd of -54 and -9 is -9, so (-54)/(-9) = (-9×6)/(-9×1) = (-9)/(-9)×6 = 6: Answer: | | h = 6
You're stupid!
No I'm not!
What's 9 + 10?
21
Combination: A set of objects in which position (or order) is NOT important.=nCr=5C3=10
9+10 = 19 <-- in a calculator
oh baby, I love me some earth
21 /0.875 = 24
0.125 = 1/8 x 7 = 0.875
the answer is 21
Permutation: A set of objects in which position (or order) is important=nPr=3P2=6
Example: arrange 2 letters out of three(a,b,c), so you have: ab, ac, ba, bc, ca, cb. That is all the arrangements you can make in this example,
Yeah, if you think about it you almost never use it unless you are signing something or typing it.
And Scores Are
smoky - 1
calc - 1
my name?
197989898732233307 under a hundred
umm no i did not google it
Then all humanity should save it and stop polluting.
cool
Thats pretty hot
I know it! Your name?
