Answer:
A= 20
Step-by-step explanation:
6a+10=130 (subtract 10)
6a=120 (divide by 6)
a=20
If you dont understand the order, you follow PEMDAS backwards
Add/subtract
Mult./div.
Exponent/root
Answer:
The length RS = 7
Step-by-step explanation:
Here, we are interested in determining the length of RS
Let’s have the line segment arranged as follows;
Q R S
where QR = 9 and QS = 16
From the arrangement, we can deduce that;
QS = QR + RS
Thus;
RS = QS - QR
RS = 16 -9
RS = 7
Answer:
327692
Step-by-step explanation:

According to the Order of Operations [GEMS(A)\BOMDAS\PEMDAS etc.], in this case, you evaluate the exponent BEFORE multiplying. This is a <em>common</em><em> </em><em>mistake</em><em> </em>people make.
I am joyous to assist you anytime.
We know that total surface area is the area of of the base + area of all the walls + area of the top
here we are working with a pyramid whose base is a square but the wall are four triangles
as triangles are connected on the top , there would be no top area ( as the top would be a point ( where all four triangles are being join )
so total area is = area of base + area of four walls ( triangles here )