Answer:
540
Step-by-step explanation:
area of trapezium is b×h

Question 11 :
the equations are :
now, let's graph the lines ~
As you can see in the attachment, The lines coincides each other, so the equations are :
Subtract -3-5 use Keep Change-Change
keep -3
change the - into a +
change 5 into -5
so... -3 + -5 is -8
-8 is the answer
Step-by-step explanation:
Did you mean:
= (a - b)(a + b)
= a.a + b.a - b.a - b.b
= a² + ba - ba - b²
= a² - b²