9a-5x
step by step explanation:
you can only add and subtract numbers that have the same variables.
12a and 3a are related because there variable is both a.
when u subtract 12a-3a you get the answer of 9a using subtraction.
7x and -2x are the second pair of related terms because they also have the same variable (x)
7x-2x is 5x using subtraction.
put the expression together:
9a-5x
hope this helps!
give me brainliest if it did plz
Answer:
6*10^-6
Step-by-step explanation:
You need a whole number for the scientific notion, right? To find that number above 1 and under 10, you can move the decimal point over until you get that number. Count the amount of spaces you moved the decimal point, and that's your number for scientific notation. To get the negative sign, you have to determine whether for scientific notation you make your number bigger or smaller. If you make it bigger, you have to put a negative sign on the exponent. If the number becomes smaller, it is a positive number. Hope this helps!
Answer:
0.7 x 10 ^ -9
Step-by-step explanation:
(3.5 x 10 ^ -4) ÷ (5 x 10 ^ 5)
3.5 / 5 x 10 ^ -4/ 10 ^ 5
=> 0.7 x 10 ^ -9
Answer: 3 desk calender's and 3 wall calendars
Step-by-step explanation: 6 x 5 = 30 and 3 x 10 = 30
30 + 30 = 60
