(7,3) because if you plug the 7 in for x and 3 in for y in both equations you get the right answer


Multiply both sides of second equation by 20 to get

Subtract that from first equation to get

Divide both sides by 0.7 to get

, so about $428.57 was spent in store. This leaves

that was spent online
Answer:
The equation in standard form is:
x^2-40x-6000 = 0
Step-by-step explanation:
Let the length of the field be x yards.
Now the width of the field is 40 yards less than the length of the field.
Thus, the width of the field would be (x-40) yards
Now, to calculate the area of the field, we simply multiply the length of the field by the width of the field.
Hence;
Since the shape is rectangular, the area is the product of the length and that of the width
x(x-40) =6,000
x^2 -40x = 6,000
x^2-40x-6000 = 0
Answer:
8 pounds of 4% solution of borax
Step-by-step explanation:
Let x be the 4% solution
24 pounds of 12% solution
obtain a 10% solution of borax that is (x+24) pounds
4% is 0.04 and 12% is 0.12 , 10% is 0.1

solve the equation for x

so 8 pounds of 4% solution of borax