Determine which of the lines are parallel and which of the lines are perpendicular. Select all of the statements that are true.

Lines a and b are parallel

Lines a and c are perpendicular

Lines d and c are perpendicular

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

Part 1) Find the slope of Line a

we have the points

(-3,4) and (3,6)

substitute in the formula

simplify

Part 2) Find the slope of Line b

we have the points

(-10,-3) and (-8,3)

substitute in the formula

Part 3) Find the slope of Line c

we have the points

(0,5) and (3,-4)

substitute in the formula

Part 4) Find the slope of Line d

we have the points

(4,-7) and (13,-4)

substitute in the formula

simplify

Part 5) Compare the slopes

Remember that

If two lines are parallel then their slopes are the same

If two lines are perpendicular then their slopes are opposite reciprocal

we have

therefore

Lines a and b are parallel (slopes are equal)

Lines a and c are perpendicular (slopes are opposite reciprocal)

Lines d and c are perpendicular (slopes are opposite reciprocal)

answer: 10 turtles

step-by-step explanation: as turtles have four legs so 4.10=40 therefore birds are 4 which sue counted