A 150-pound person uses 6.7 6.7 calories per minute when walking at a speed of 4 mph. how long must a person walk at this speed to use at least 170 170 calories? a person must walk for at least nothing minutes in order to use at least 170 170 calories. (round up to the nearest minute.) enter your answer in the answer box.

A person must walk for 25.37 minutes in order to use 170 calories.

Step-by-step explanation:

A 150-pound person uses 6.7 calories per minute when walking at a speed of 4 mph.

Let the person takes x minutes to walk at this speed.

So, the time needed to burn 170 calories is given by:

Solving for x, we get;

x = 25.37 minutes

Hence, A person must walk for 25.37 minutes in order to use 170 calories.

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)