These three. i don’t know how to do them

23)

P = 20x^2 + 14xy^2

A = 70x^3y^2

24)

P = 8a^3b + 4ab

A = 4a^4b^2

25)

A = 18x^3y

Step-by-step explanation:

23)

P = 2(10x^2 + 7xy^2)

P = 20x^2 + 14xy^2

A = 10x^2 x 7xy^2

A = 70x^3y^2

24)

P = 2a^3b + 6a^3b  + 4ab

P = 8a^3b + 4ab

A = 1/2(2a^3b)(4ab)

A = 4 a^4 b^2

25)

A = 1/2(4xy+8xy)(3x^2)

A = 1/2(12xy)(3x^2)

A = 18x^3y

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours