Answer:
30 ml of 45% salt solution and 20 ml of 30% salt solution.
Step-by-step explanation:
Let x be the amount of 45% salt solution and y be the amount of 30% salt solution
the two equation will be:
x+y=60 -- A
0.45x+0.3y=0.4(60) -- B
Solve by substitution
Rewrite Equation A
x+y=60
x=60-y --- C
Substitute C into B
0.45(60-y)+0.3y=24
27-0.45y+0.3y=24
-0.15y=-3
y=20
<u>Substitute</u> the y=20 into equation C
x=60-20
x=30
Therefore, there was 30 ml of 45% salt solution and 20 ml of 30% salt solution.
Answer:
D
Step-by-step explanation:
The formula of a circle is where the vertex is (h,k).
The vertex is (4,-2) and the radius is 5, so substitute the numbers in and you get the solution.
Answer:
3
Step-by-step explanation:
First find the values where f(x) = g(x)
These occur when the graphs intersect
x = -2, -1, 2
These are the points where the graphs intersect
Given the choices of -1,2,3,-2
They do not intersect at 3
The answer is:
The answer is:
Step-by-step explanation:
Answer:
46 years 1 month
Step-by-step explanation:
Let us assume the investment is a simple interest investment
The simple interest formula is
A= P(1+rt)
Given
Principal p= $1400
Rate r= 7.75%= 7. 75/100= 0.0775
Final amount A = $6400
Time t=?
To find the time t let us substitute our values in the simple interest formula
6400= 1400(1+0.0775t)
6400= 1400+108.5t
6400-1400=108.5t
5000= 108.5t
t=5000/108.5= 46.08
t= 46.1 years
It will take approximately 46 years 1 month to get the amount