3 times a number (x) minus y equals y plus 2 times x all multiplied by 5
Answer:
(3,-3)
Step-by-step explanation:
First you divide 2 out of the first equation and it turns into 5x+y=12.
Then you write one on top of the other so you can add them. It looks like:
5x + y = 12
-5x + y = -18
Then you add them together and the 5x's cancel each other out and you are left with 2y = -6
So then you divide both sides by 2 and get y = -3
Then you plug -3 into the second equation because it is simpler and get -5x - 3 = -18
So then you add three to both sides and get -5x = -15
And finally you divide both sides by -5 and get x=3
Answer:
14 cm.
Step-by-step explanation:
We have been given that an aquarium is a right rectangular prism 18.5 cm long and 15 cm wide. We are also told that Martene put 3885 cubic cm of water in the aquarium.
To find the depth or height of aquarium, we will use volume of rectangular prism formula.
, where,
l = Length of prism,
w = Width of prism,
h = Height of prism.
Upon substituting our given values in above formula we will get,
Therefore, the aquarium is 14 cm deep.
Volume formula for cylinder is pir^2h. So that will be 4 times 4 times 3 times. That will be 48 cubic inches. However you still have pi left but if we were to multiply 3.14 by 48 we’ll get around 150 but that isn’t answer choice so go with 48.
Answer:
150.72
Step-by-step explanation:
V = 3.14 x r^2 x h
V = 3.14 x 2^2 x 12
V = 3.14 x 4 x 12
V = 150.72
