So... the radiator has 15 liters of 70% antifreeze.. but needs an 80% antifreeze
well, so, you need to drain some and put some with higher percentage, seems to be, you will end up at the same 15 liters, possible the radiator's capacity, of 80% antifreeze
so, the same amount going out, of 70% is the same amount going in, of 100% antifreeze
now.. let's use the decimal format for the percents, or 70% is 70/100 or 0.7 and so on
![\bf \begin{array}{lccclll} &amount&concentration& \begin{array}{llll} concentration\\ amount \end{array}\\ &-----&-------&-------\\ \textit{70\% sol'n, out}&x&0.7&0.7x\\ \textit{100\% sol'n, in}&x&1.00&x\\ \textit{current 70\% sol'n}&15&0.7&10.5\\ -----&-----&-------&-------\\ mixture&15&0.8&12 \end{array}](https://tex.z-dn.net/?f=%5Cbf%20%5Cbegin%7Barray%7D%7Blccclll%7D%0A%26amount%26concentration%26%0A%5Cbegin%7Barray%7D%7Bllll%7D%0Aconcentration%5C%5C%0Aamount%0A%5Cend%7Barray%7D%5C%5C%0A%26-----%26-------%26-------%5C%5C%0A%5Ctextit%7B70%5C%25%20sol%27n%2C%20out%7D%26x%260.7%260.7x%5C%5C%0A%5Ctextit%7B100%5C%25%20sol%27n%2C%20in%7D%26x%261.00%26x%5C%5C%0A%5Ctextit%7Bcurrent%2070%5C%25%20sol%27n%7D%2615%260.7%2610.5%5C%5C%0A-----%26-----%26-------%26-------%5C%5C%0Amixture%2615%260.8%2612%0A%5Cend%7Barray%7D)
so.. let's subtract, from the current solution, 0.7x and add 1x or x, our antifreeze concentration amount, should be 12 though
10.5 - 0.7x + x = 12
solve for "x"
Answer:
What do you need?
Step-by-step explanation:
I mean there wasn't a question to answer here
The <em><u>correct answer</u></em> is:
16°.
Explanation:
The sum of the measures of the angles of a triangle is 180°. The two angles we have are 92° and 72°; together, these total to
92+72 = 164
This leaves us
180-164 = 16° for the remaining angle of the triangle.
Answer:
that is invalid question
Step-by-step explanation:
Answers:
Biggest = 100 inches
Smallest = 31 inches
=======================================================
Work Shown:
Replace d with 132 to get,
Tmax = 3d/4 + 1
Tmax = 3*132/4 + 1
Tmax = 396/4 + 1
Tmax = 99 + 1
Tmax = 100
The biggest size they should buy is a 100 inch tv.
Do the same for the minimum size equation.
Tmin = d/4 - 2
Tmin = 132/4 - 2
Tmin = 33 - 2
Tmin = 31
The smallest tv they should buy is a 31 inch tv.