12 cm for the first one and 11.6 for the second.
Unrelated to the question, that house around number 3 gives me nostalgia of elementary school :)
-6x + 6y =6
-6x + 3y = -12
You would multiply the bottom equation by -1 to make -6x a positive so you can eliminate it.
-6x + 6y = 6
6x + -3y = 12
Eliminate -6y and add 6y to -3y as well as 6 and 12.
0 + 3y = 18
3y = 18
divide both sides by 3
y = 6
now that you know the value of y it will be easy to find x :)
Answer:
Step-by-step explanation:
Hello!
In this problem, we will need to know our properties of exponents.
When we multiply two exponents, for example 10^3 × 10^-1, we will need to add the powers together. So, 10^3 × 10^-1 = 10^2 or 100.
With this, we can multiply the two constants together, and the exponents together to find our quotient.
(8.2 × 10^-6) × (9.4 × 10^-3) (rearrange the expression)
8.2 × 9.4 × 10^-6 × 10^-3 (multiply)
77.08 × 10^-9
If you wanted your answer to be in scientific notation, move the decimal place in 77.08 one place to the left, leaving you with 7.708 × 10^-8.
Therefore, your final answer is 7.708 × 10^-8.
