знайка и незнайка розв'язували задачі з математики, знайка розв'язав 15\19 усіх задач. Скільки всього задач розв'язали Знайка і Незнайка, якщо Знайка розв'язав на 44 задачі більше, ніж Незнайка?​

Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

If y varies directly as x2 and y=6 when x=6, find the constant of variation.