Use inequality notation and interval notation to describe y is no more than 20

Inequality notation:

Interval notation: ( - ∞, 20]

Step-by-step explanation:

"y is no more than 20"

means y is NOT larger than 20, but less than AND also equal to 20.

This can be written with inequality sign as

In interval notation,

So would mean that y is from -∞ till 20, where 20 is INCLUDED.

Hence, we can write (-∞,20] in interval notation.

Note:

The "(" before -∞ indicates that it is not included (infinity is not a number, but a concept so you can't equate something to infinity)

The "]" after 20 indicates that 20 is INCLUDED in the inequality

86

step-by-step explanation:

find the area of the triangle then multiply by 2 then add the area of the parollelegram multiplied by 2