Answer:
a. 19x-13 b. ![2(32x^{15}y^{3}-1).](https://tex.z-dn.net/?f=2%2832x%5E%7B15%7Dy%5E%7B3%7D-1%29.)
Step-by-step explanation:
a. 3(-3+5x)-1(4-4x) = -9+15x-4+4x = 15x+4x-9-4 = 19x-13.
b. ![64x^{15}y^{3}-2(-15e^{5}\frac{t}{30}e^{-2}t^{-3})^{0}](https://tex.z-dn.net/?f=64x%5E%7B15%7Dy%5E%7B3%7D-2%28-15e%5E%7B5%7D%5Cfrac%7Bt%7D%7B30%7De%5E%7B-2%7Dt%5E%7B-3%7D%29%5E%7B0%7D)
= ![64x^{15}y^{3}-2 = 2(32x^{15}y^{3}-1).](https://tex.z-dn.net/?f=64x%5E%7B15%7Dy%5E%7B3%7D-2%20%3D%202%2832x%5E%7B15%7Dy%5E%7B3%7D-1%29.)
3.5x10^4
lets break it down
10^4= 10x10x10x10 so 10,000
so therefore 3.5x 10,000= 35,000
(if i am wrong please tell me and ill try to fix my mistakes)
let 'x' represent the number of all the passes for the year
350 passes = 70% of all the passes
350 passes = 70% of x
0.70x = 350
by solving we find:
x = 500 passes
Answer:X=5/6 Y=8/5
Step-by-step explanation:
-6x +5y=3
+6x
5y=6x+3 (divide each number by 5)
Y=6/5x + 3/5 (Plug that into your x equation)
12x+15 (6/5x + 3/5) =34
(Multiply 15 by the numbers in the brackets you can break it down and do 15•6 divided by 5 )
15•6=90 divided by 5=18x
15•3= 45 divided by 5=9
(Add like variables)
12x+18x=30x
30x+9=34
(Subtract 9 from itself do the same to 34)
9-9= 0
34-9=25
Divide 30 by itself to get x by itself then divide 25 by 30
25 divided by 30= 5/6
X=5/6 (plug that into the y equation)
Y=6/5•5/6+3/5
Multiply 6/5 and 5/6 straight across because this is multiplication you don't need like denominators
6/5•5/6=30/30=1
Y=1+3/5
1/1 + 3/5
Here you need to have like denominators because it is addition so just use 5
5•1=5
5/5+3/5=8/5
Y=8/5