Don't go by my answers pls

19)  ( )^2 =

20) - = -81

21)   = 16

Step-by-step explanation:

The only wrong ones are

19)  ( )^2 =

20) - = -81 ... negative is not inside a parenthesis that's why it is still negative

21) you can add another way is = 16

Everything else looks good.  Great job!

answer: the resulting cross section is a rectangle. solution: a plane parallel to the base of a triangular prism will intersect a cross section that is the same shape as its bases. so the cross section is a triangle.

step-by-step explanation:

45.36 feet per second.

step-by-step explanation:

to find the most accurate determination for the number of feet per second tyrone traveled on his way to work let us convert miles to feet and minutes to seconds.

1 mile = 5280 feet.

1 minute = 60 seconds.

now we will divide 158400 by 3492 to find the most accurate determination for the number of feet per second tyrone traveled on his way to work.

therefore, tyrone traveled on his way to work at the rate of 45.36 feet per second.