B) 6 years old
C) 8 years old
D) 10 years old
Answer:
The answer is B) 6 years
Step-by-step explanation:
First of all, build an equation. With the given problem, you can come up with:
s + c = 16
In which interprets that both their ages summed up are 16. Secondly,:
s = c + 4
After you will use the typical system of equations to solve. So, plug in the second equation to the first, where s will become c + 4, and the equation is now:
c + 4 + c = 16
And finally, solve for Charmaine's age.
2c + 4 = 16
-4 -4
-----------------
2c = 12
c = 6
Answer:6 years old
Step-by-step explanation:
-15 = 22x + 7
Answer:
The slope is -4
Step-by-step explanation:
To find the slope in this equation you first need to find the difference of y.
2 + (-4) = -2
-2 + (-4) = -6
so the difference of y is -4
Then you find the difference of x
0 + 1 = 1
1 + 1 = 2
So, the difference of x is 1
slope is rise over run (rise meaning the y-axis and run meaning the x-axis)
so the slope is -4/1
Answer: Brian invested $16000 in Fund B .
Step-by-step explanation:
Let x be the amount Brian invested in Fund B.
Given, The $8000 that he invested in Fund A returned a 4% profit. The amount that he invested in Fund B returned a 1% profit.
i.e. profit on Fund A = 4% of 8000 = 0.04 ×8000 = $320
Profit on Fund B = 1% of x = 0.01x
Together they earn 1% profit, i.e. Combined profit = 2% of (8000+x)
= 0.02(8000+x)
As per question,
Combined profit=Profit on Fund A+Profit on Fund B
Hence, Brian invested $16000 in Fund B .