Answer:
John should use:
4 grams of the 30% solution and 16 grams of the 60% solution
Step-by-step explanation:
Let the number of grams of the 30% solution = x
Let the number of grams of the 60% solution = y
John needs 20 grams of 54% acid solution for his science project.
Hence,
x + y = 20 grams..... Equation 1
x = 20 - y
His school's science lab has bottles of 30% solution and bottles of 60% solution.
30% × x + 60% × y = 54% × 20
0.3x + 0.6y = 10.8......Equation 2
We substitute 20 - y for x in Equation 2
0.3(20 - y) + 0.6y = 10.8
6 - 0.3y + 0.6y = 10.8
- 0.3y + 0.6y = 10.8 - 6
0.3y = 4.8
y = 4.8/3
y = 16 grams
x = 20 - y
x = 20 - 16
x = 4 grams
Therefore, John should use:
4 grams of the 30% solution and 16 grams of the 60% solution
Add 2500G and 1250G and you get 3750
divide by 6 and you get 625
answer 625
Answer:
44 ft
Explanation:
Perimeter of rectangle: 2(Length + Width)
Here given:
Perimeter: 2(L + W) = 2(14 + 8) = 2(22) = 44 ft
Answer:
4.5 seconds pass before reaching the ground
Step-by-step explanation:
The height of the object is given by the following equation:
How many seconds pass before reaching the ground
It hits the ground when h(t) = 0. So
There are no negative instants of time, so only the positive answer interests to us.
4.5 seconds pass before reaching the ground
Answer:
This question is fairly simple to find. Use y=mx+b to calculate the equation of the line, where m represents the slope and b represents the y-intercept.
To calculate the equation of the line, use the y=mx+b format.
So, your answer is y=3x-4
Hope this Helps!
