Answer:the number of pounds of blueberry granola that she should put in the mixture is 10 pounds.
the number of pounds of apple granola that she should put in the mixture is 20 pounds
Step-by-step explanation:
Let x represent the number of pounds of blueberry granola that she should put in the mixture.
Let y represent the number of pounds of apple granola that she should put in the mixture.
She wants to make a 30 pounds mixture. This means that
x + y = 30
A store is selling a mixture of apple granola and blueberry granola for $6.99 per pound. This means that the cost of the 30 pound mixture would be
30 × 6.99 = $209.7
Blueberry granola costs $8.99 per pound and apple granola costs $5.99. This means that
8.99x + 5.99y = 209.7 - - - - - - - - - -1
Substituting x = 30 - y into equation 1, it becomes
8.99(30 - y) + 5.99y = 209.7
269.7 - 8.99y + 5.99y = 209.7
- 8.99y + 5.99y = 209.7 - 269.7
- 3y = - 60
y = - 60/ -3
y = 20
Substituting y = 20 into x = 30 - y, it becomes
x = 30 - 20 = 10 pounds
Answer:
98°
Step-by-step explanation:
180° - 82° = 98°
Answer:
I'm sorry I don't have answer but.
it's not C!
Answer:
Step-by-step explanation:
The sum of the ages of a Mother and her son is 78 , three years ago the mother is five times as old as the son, what is their present ages?
To solve this , let the age of the mother be x and the age of the son be y , from the first statement :
x + y = 78
Three years ago , the mother will be x- 3 and the son will be y - 3 , from the second statement:
x - 3 = 5 ( y-3)
x- 3 = 5y - 15
x - 5y = -12
The resulting equations are
x + y = 78
x - 5y = -12
This is called a simultaneous linear equation , that means it is a linear equation.
The side of a square is xcm , if the difference between the area and the perimeter is 12 , find the legth of its side.
Interpretation:
The formula for the area of a square is
and the perimeter is 4l , from the question , we have
- 4x = 12
This is not a linear equation , it is simply a quadratic equation , so the situation is non linear
Answer:
68.04
Step-by-step explanation: