Answer:
20 becuase thats how many shells are in the table
Step-by-step explanation:
6ft. Is equal to 72in.
1ft. Equals 12 in.
6 times 12 equals 72 inches
100/2 = 50 pies per hour
350/50 = 7 hours
Answer:
Step-by-step explanation:
hello :
5(x + 7)² = 245
(x + 7)² = 49
x=0 is solution but you have other solution -14 because :(-14+7)² = (-7)² =49
here is an solution Step-by-step :
(x + 7)² = 49 means : (x + 7)² = 7²
(x + 7)² - 7²=0 use identity : a²-b² = (a-b)(a+b)
a=x+7 and b= 7
(x+7-7)(x+7+7) = 0
x(x+14)=0
x=0 or x+14=0
so : x=0 or x= -14