Porfavor ayudenme a solucionar esto

a. [(2X^3) + Y] * [(-1/4) -XY]

b. Ab = [(n^2 - 1) * (4m - n)] / 2 + (4m - n)^2

Step-by-step explanation:

Hello

For a:

The figure is a rectangle, then its area is Lenght*Weight, then:

Aa = [(2X^3) + Y] * [(-1/4) -XY]

For the b:

The total figure is composed by two figures, a square and a rectangle triangle:

Then, Ab = Atriangle + Asquare

Atriangle = (Base*height)/2

Atriangle = [(n^2 - 1) * (4m - n)] / 2

Asquare = Side*Side

Asquare = (4m - n)*(4m - n)

Asquare = (4m - n)^2

Then

Ab = [(n^2 - 1) * (4m - n)] / 2 + (4m - n)^2

You can to do now the reduction of terms and factorizations =D

Best regards

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.