A).-40
B).-20
C).20
D).40

D) 40

Step-by-step explanation:

(3)(-2)² (-12)(-2) + 4

(3)(4) + (24) + 4

12 + 24 + 4 = 40

To understand:

Rules of adding integers

To add integers having the same sign, keep the same sign. and add the absolute value of each number. To add integers with different signs, keep the sign of the number with the largest absolute value and subtract the smallest absolute value from the largest. Subtract an integer by adding its opposite.

Rules of subtracting integer

First, keep the first number (known as the minuend).  Second, change the operation from subtraction to addition.  Third, get the opposite sign of the second number (known as the subtrahend) . Finally, proceed with the regular addition of integers.

Rules of multiplying and dividing integers

Multiplication and Division of Integers.

RULE 1: The product of a positive integer and a negative integer is negative. RULE 2: The product of two positive integers is positive.

RULE 3: The product of two negative integers is positive.

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'.