Please help, I have no idea how to solve this. Can someone teach me how? 6a^2+4f-3 when a=2 and f=4

157

Step-by-step explanation:

First, let's subsitute a and f.

6(2)^2 + 4(4) - 3

Remeber the order of operations. Paranthesis, exponents, multiply, divide, add, subtract.

12^2 + 16 - 3

144 + 16 - 3

157 is the answer. Hope this helps

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

18.8cm hope i at all

step-by-step explanation: