c = 5n
the cost (c) would equal (=) the number or notebooks (n) times $5 (5) because each is five dollars.
Answer:
1) (x + 4)(x - ½) = 0
4x² + 16x = 0
2) 0.25x² + 0.8x - 8 = 0
3x² - 4x = 15
Step-by-step explanation:
1) (x + 4)(x - ½) = 0
x = -4, ½
4x² + 16x = 0
4x(x + 4) = 0
x = 0, -4
2) (x - 6)(x + 9) = 0
x = 6, -9
(x - 1)² = 4
(x - 1)² - (2)² = 0
(x - 1 - 2)(x - 1 + 2) = 0
(x - 3)(x + 1) = 0
x = 3, -1
These two are easier to solve using product = 0 property, while the other two would be easier using the quadratic formula
Answer:
Step-by-step explanation:
Area of a circle.
Area of a square.
Subtract the area of the square with the area of the circle.
I hope it helps.
Brainliest much appreciated.
8f - 25 = 47. Add 25 to both sides.
8f = 72. Divide each side by 8.
f = 9.
Answer:
4.13
Step-by-step explanation:
To find out how many kilometres they ran in all you have to do 1.43+2.7 =4.13
