Call x and y the 2 numbers.
x + y = 32
x - y = 8
2x = 40 -> x = 20, and y = 32 - 20 = 12.
Answer:
x = 11, y = 17
Step-by-step explanation:
Set the equations equal to each other. Since the vertical angles are congruent, 8x + 7 = 9x - 4 and 5y = 7y - 34. Now, solve your equations for the x and y values.
8x + 7 = 9x - 4
x = 11
5y = 7y - 34
2y = 34
y = 17
Answer:
0.45 = 45% probability that the member uses the golf course but not the tennis courts
Step-by-step explanation:
I am going to solve this question using the events as Venn sets.
I am going to say that:
Event A: Uses the golf courses.
Event B: Uses the tennis courts.
5% use neither of these facilities.
This means that
75% use the golf course, 50% use the tennis courts
This means, respectively, by:
Probability that a member uses both:
This is . We have that:
So
What is the probability that the member uses the golf course but not the tennis courts?
This is , which is given by:
So
0.45 = 45% probability that the member uses the golf course but not the tennis courts
(Pay attention to the subject you're choosing, this is supposed to be in the Chemistry section, not here in the Mathematics)
On the periodic table, the Magnesium Mg is located in period 3, group 2. So it got 12 electrons.
So to become the cation Mg2+, the Magnesium has lost 2 electrons during it's formation.
So 12-2=10.
So there's 10 electrons in the Cation magnesium Mg2+
Hope this Helps! :)
I am not sure about all of them, but it says to write the answers in simplest form, but number 4 is not in simplest form.
4/12 can be simplified to 1/3