Check the picture below.
make sure your calcualtor is in Degree mode.
Answer:
Lowest grade is 70.
Step-by-step explanation:
To have an average of 80 the total score is 4 * 80 = 320.
So the score for the next test must be 320 - (85 + 74 + 91)
= 70.
Answer:
1 3/4 t -7/2
Step-by-step explanation:
t + 3/4t - 7/2
Get a common denominator for the t terms, which is 4
4/4t + 3/4t - 7/2
7/4 t -7/2
This is an improper fraction so change it to a mixed number
1 3/4 t -7/2
2y + 2x = 6
2y - x = 12
Subtract
3x = -6, x = -2
2(-2) + 2y = 6
-4 + 2y = 6
2y = 10, y = 5
Final solution: x = -2, y = 5
To find the value of X you would have to solve the equation.
Example: for question 2