Answer:
Step-by-step explanation:
The line of best fit in scatter diagram, the variable have positive correlation.
Scatter Diagram is attached :
Answer:
66 2/3 mL
Step-by-step explanation:
Let v represent the volume in mL of added 30% solution. Then the amount of salt in the mix is ...
0.10×100 +0.30×v = 0.18(100 +v)
0.12v = 0.08(100) . . . . .subtract (0.18v +0.10×100)
v = 8/0.12 . . . . . . . . . . . divide by the coefficient of v
v = 66 2/3 . . . . mL
Adding 66 2/3 mL of 30% salt solution to 100 mL of 10% salt solution will make 166 2/3 mL of 18% salt solution.
It's a COMBINATION where 7 are chosen out of 11
₁₁C₇ = (11!)/(7! , 4!) = 330 combinations
That's correct but whats your question?
Answer:
x = -62/7
Step-by-step explanation:
-7x+(-21)=41
-7x -21 =41
Add 21 to each side
-7x-21+21 = 41+21
-7x = 62
Divide by -7
-7x/-7 = 62/-7
x =- 62/7