Your answer would be 30t - 4
Try this:
1) note that weight of pure antifreeze before mixing and after mixing is the same. So, if 'x' is weight of pure antifreeze in 50% solution, it is possible to make up equation before mixing: 0.5x+0.2*90.
2) there are 0.2*90=18 gal. of pure antifreeze in the 20% solution. If 'x' gal. is the weight of pure antifreeze in 50% sol. and 18 gal. is the weight of pure antifreeze in 20% sol., it is possible to make up an equation after mixing: 0.4(x+18).
3) using the both parts: 0.5x+0.2*90=0.4(x+18) ⇒ x=54 gal. of <u>pure</u> weight.
4) to find 50% solution of 54 gal. pure weight just 54:0.5=108 gal.
Answer: 108 gal.
The number are 1/4 π and ![\sqrt[3]{9}](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B9%7D)
are irrational number.
It is required to choose the numbers are irrational.
<h3>
What is real number?</h3>
Real numbers are numbers that include both rational and irrational numbers. Rational numbers such as integers (-2, 0, 1), fractions(1/2, 2.5) and irrational numbers such as √3, π(22/7), etc., are all real numbers.
Given that:
The given option are
-2.3456 =-23456/10000
since, -2.3456 can be represented as rational numbers.
π is an infinite decimal, so it cannot be expressed as a rational number.
So, 1/4 π is irrational number.
is an irrational number.
2 + √16=2+4= 6 is a rational number.
Therefore, the number are 1/4 π and are irrational number.
Learn more about real number here:
brainly.com/question/551408
#SPJ1
Answer:
simple interest is 8350 for 15 months
Step-by-step explanation:
Explanation:-
The simple interest formula A = P (1 + r t)
where 'P' is the principal amount of money to be invested at an interest Rate' r % per period for' t ' number of time periods.
Given data The principal P is borrowed at a simple interest rate r for a period of time t.
Given principal amount P = $8000
simple interest rate r = 3.5%
period of time 't' = 15 months
Calculation:-
Putting time into years
t = 1.25 years
r = 3.5%
r = 0.035 per year
now equation is A = P (1 + r t)
A = 8000 ( 1+ ( 0.035 X 1.25)
A = 8000 X 1.04375
A = 8350
simple interest is 8350 for 15 months.
Hey can you please help me posted picture of question- Graph A
