There are 28 butterflies in the garden. Some are blue and some are yellow. If b represents the number of blue butterflies in the garden, which expression represents the number of yellow butterflies in the garden?

y = 28 - b

Step-by-step explanation:

you can find the number of yellow butterflies, y, by subtracting the number of blue butterflies, b, from the total number of butterflies which is 28.

EXPLANATION:

City A is 96 feet below sea level can be represented with -96

City C is 24 feet below sea level can be represented with -24

City D is 1/4 of the elevation of City C can be represented with 1/4 times -24

ANSWER TO PART A:

When you rewrite the value of City D for the expression to solve for D, you get

1/4 x -24

ANSWER TO PART B:

One fourth of -24 is -6, therefore the elevation of City D is -6. The answer is negative because it is six feet below sea level and since sea level would be 0 elevation, six feet below 0 would mean it is negative.