What the heck??? I do not understand this at all...!!!

It's (a).

Step-by-step explanation:

Y ≥ 1:

The line y = 1 is a horizontal passing though  the point on the y axis where y = 1 and y  ≥ 1 is the area above this line,. The area is shaded above this line,

Y  ≥ x - 1:

The line  y = x - 1 is a line which rises to the right with gradient 1 and which passes through the point (0, -1) on the y axis. Y  ≥ x - 1  is the area above the line and is shaded.

The combination of these 2 inequalities gives us diagram (a). The shaded part satisfies both inequalities.

step-by-step explanation:

quartic functions has x = –1 and x = –2 as its only two real zeroes:

f(x) = a(x+2)(x+1)   a: real number

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )