Answer:
Own words: Writing in scientific notation allows the equation to appear simpler and more approachable.
Step-by-step explanation:
Online Definition: To write a number in scientific notation, if the given number is greater or equals to 10, the decimal point is moved to the left of the number and so, the power of 10 becomes positive. ... Writing numbers in scientific notation not only simplifies them, but also makes them easier to multiply
Answer:
(x-2)(x+2)
Step-by-step explanation:
use the difference of squares
x²-4 = x²-2² = (x-2)(x+2)
Step-by-step explanat
(g) 3[(3)²-2]+4=3(9-2)=3×7=21+4=25
We know there were 21 vehicles so one of the equations is:
c+b=21
We can find the second equation with the other given information:
30b+4c=318
We can use manipulate the first equation then use substitution to solve the system:
c=21-b
We can plug this into the second equation:
30b+4(21-b)=318
30b+84-4b=318
26b+84=318
26b=234
b=9
Now we can plug this into one of the original equations to solve for c (the first equation is easier):
c+9=21
c=12
You can check your work by plugging the answers into the two equations:
12+9=21
21=21
(30)(9)+(4)(12)=318
270+48=318
318=318
There are 9 buses and 12 cars.
Answer:
14b
Step-by-step explanation:
