Answer:
6
Step-by-step explanation:
divide 18 by 3 you get x=6
2.25/3=0.75.....0.75*2= 1.5. 1.5 is your answer.
Answer:
100 revolts
Step-by-step explanation:
180s = 3min
150/3 is 50,
50 = 1 min
50 * 2 is 100
Answer:
15 y 8
Step-by-step explanation:
y = x - 7
x² + y² = 289
sustituir: x² + (x - 7)² = 289
distribuir: x² + x² - 14x + 49 = 289
sustraer + simplificar: 2x² - 14x - 240 = 0
dividir: x² - 7x - 120 = 0
x² - 15x + 8x - 120 = 0
(x - 15)(x + 8) = 0
x = 15, x = -8 --> x ≠ -8 porque -8 no es naturales
sustituir: y = 15 - 7
simplificar: y = 8
X= 9/2, 15/2
decimal form: 4.5,-7.5
mixed number form: 4 1/2, -7 1/2
