Math Problems?

Question

Can you plz answer and explain?

solve for b1:
A=1/2h (b1 + b2)

solve for T:
I=Prt

AND

fill in the blanks:

1. Each point in a coordinate plane corresponds to an _____ of real numbers.

2. In the ordered pair (2,5), the y-coordinate is _________ .

3. The x-axis and the y-axis divide the coordinate plane into four __________

Answer 1

When isolating the variable b1, you want to get it by itself. To do that, you must somehow move 1/2h and b2 to the other side.


A= (b1 + b2) / 2h

First, lets move the 2h to the other side. To move it to the other side we must do the opposite. What is the 2h doing to the equation right now? It is dividing. And the opposite of dividing is multiplying.

2hA = b1 + b2

Now lets move the b2 over to the other side. It is adding so the opposite of that is subtracting.

2hA - b2 = b1

And there you go. Try doing the next one on your own.

Answer 2

A = 1/2h (b1+b2)
1/2h (b1+b2) = A
1/2h(b1+b2)* 2h = A* 2h
b1 + b2 = 2Ah
b1+b2-b2 = 2Ah-b2
b1 = 2Ah-b2

I = Prt
Prt = I
Prt/Pr = I/Pr
t = I/Pr

1. Each point in a coordinate plane corresponds to an intersection of real numbers.

2. In the order pair (2,5), the y coordinate is 5.(where x=2, y=5)

3. The x-axis and the y-axis divide the coordinate plane into four quarters.

Answer 3

We frown on submission of homework problems unless they relate to a problem of understanding or formulation. Here, it look like you are just looking for someone to do your work for you. Not me.