Atextbook store sold combined total of 296 biology and psychology textbooks in a week. the number of biology textbooks was three times the number of psychology textbooks sold. how many textbooks of each were sold

888 psychology books were sold

Step-by-step explanation:

296•3=888

Step-by-step explanation:

The complete question is

Alex is planning to surround his pool ABCD with a single line of tiles. How many units of tile will he need to surround his pool?

A coordinate plane with quadrilateral ABCD at A 0 comma 2, B 3 comma 5, C 7 comma 1, and D 4 comma negative 2. Angles A and C are right angles, the length of segment AB is 4 and 24 hundredths units, and the length of diagonal BD is 7 and 7 hundredths units

we have

The coordinates of the pool are

A(0,2),B(3,5),C(7,1),D(4,-2)

Applying the Pythagoras Theorem

Find out the length of side AD

substitute the given values

Find the perimeter of the pool

The perimeter of a quadrilateral is equal to

substitute

see the attached figure to better understand the problem