The correct answer is1D k 2D k 3Dk
Answer:
85
Step-by-step explanation:
The correlation coefficient relates the standarized values of the midterms a final score in this way:
where y is the final score that needs to be found, y^ is the average score on the finals, sy is the standar deviation for the scores on the finals, x is the midterm score, x^ is the average score on the midterms and sx y the standard deviation of the scores on the midterms.
If we issolate y on the equation and solve with the data we have, we get that:
r* \frac{x - x^}{sx}[/tex] = 0.5 * 
= 1
y = 75 + 1*10 = 85
This means the predicted final score will be 85.
Answer: 16
Solution:
1) Use letters to identify the variables:
Number of trumpets: t
Number of clarinets: c
2) Translate each statement into algebraic (mathematical) language.
2.1) Sold a total of 27 used trumpets and clarinets
=> t + c = 27
2.2) Trumpets cost $149 and clarinets cost $99
Total cost of the trumpets: 149t
Total cost of clarinets: 99c
Total cost = 149t + 99c
2.3) Total sales were $3223
=> 149t + 99c = 3223.
3) State the system of equations:
Equation (1) t + c = 27
Equation (2) 149t + 99c = 3223
4) Solve the system of equations:
4.1) Multiply equation 1 by 149:
=> 149t + 149c = 4023
4.2) Subtract the equation (2) from the equation obtained in 4.1
=> 149c - 99c = 4023 - 3223
=> 50c = 800
=> c = 800 / 50 = 16
5) Verify the solution:
From equation (1) t = 27 - 16 = 11
Total cost = 149*11 + 99*16 = 3223
Now you have a verified answer: they sold 16 clarinets
1) 8^3/4 = 4th root (8^3) (top row, third one)
2) 7^2/3 = ∛7^2 (second row, third one)
3) 3^4/3 = ∛3^4 (second row, first one)
4) 25^3/4 = 4th root (25^3) (first row, first one)
5) 44^3/2 = √44^3 (third row, first one)
The awnser would be 1.6 square feet beacause 8 times 0.2
