Question

ok what is 14. Solve the area formula for a trapezoid, , for .

Answer 1

it is A=1/2h(b1+b2)for b1

Answer 2

A=0.5*h*(b1+b2)
2A/h=b1+b2
b1=2A/h-b2

Answer 3

what?

Answer 4

Well, from your partially written out question, I assumed you want to solve the trapezoid formula for b1.

Answer 5

no that is the question that my techer gave me

Answer 6

So what is your question?

Answer 7

14. Solve the area formula for a trapezoid, , for . (2 points)
b1 = 2Ah – b2



1.b1= 2Ahb2
2.b1=2A/hb1
3.b1=1/2ahb1
4.b1= 2Ahb2
wech wo is rifgt

Answer 8

i mean right

Answer 9

None of them are right...

Answer 10

yes i got it it is b1=AH-b2

Answer 11

i mean it hase to be

Answer 12

Why? Try going from that back to the area formula for a trapezoid.

Answer 13

ok

Answer 14

i got b2=1/2hb1a

Answer 15

Write out your steps? I swear you need a subtraction in there somewhere.

Answer 16

me to

Answer 17

b1= 1/2AH-b2

Answer 18

i do not get any of it

Answer 19

can you help

Answer 20

hey taking a look

Answer 21

so what was given was the first line? b1 = 2Ah – b2

Answer 22

14. Solve the area formula for a trapezoid

Answer 23

ah ok so this is the formula of the trapazoid? t is A=1/2h(b1+b2)for b1

Answer 24

2A = 1/2h(b1+b2)

Answer 25

err sorry 2A/h = b1+ b2

Answer 26

b1 = 2A/h - b2

Answer 27

but how

Answer 28

that is what i do not get

Answer 29

ok so
1. A=1/2h(b1+b2)
2. A = h/2(b1 + b2) (another way to write 1/2h is h/2)

Answer 30

now we want to multiply both sides by 2

Answer 31

and we get
3. 2A = h(b1 + b2)

Answer 32

now we want to divide both sides by h, to get rid of the h - the whole point here is trying to get b1 by itself - so we continuously perform the same operation to both sides of the equation until it's alone - since if you do the same thing be it multiple, divide, or add to both sides, you still have a valid equation

Answer 33

so 2A/h = h(b1+b2)/h

Answer 34

and since we know h/h = 1, we can get rid of h on the right side

Answer 35

so 2A/h = b1+b2

Answer 36

so now, to get b1 by itself, we need to subtract b2 from both sides

Answer 37

so 2A/h - b2 = b1+b2-b2

Answer 38

that eliminates the b2 on the right side, and leaves b1 alone

Answer 39

oh ok

Answer 40

sp 2A/h - b2 = b1, or b1 = 2A/h - b2

Answer 41

ok i am starting to get it

Answer 42

but as far as the options go on your multiple choice - I don't see any that match

Answer 43

ok i will contact my techer

Answer 44

tomorrow

Answer 45

ok sorry =(

Answer 46

you could try inputting different values for b1 and b2

Answer 47

and h

Answer 48

and see which answer matches the from the choices and the original equation

Answer 49

ok

Answer 50

but I would do it with our answer first

Answer 51

and see if they match up to the original area equation

Answer 52

if different values of b1,h, and b2 are always equal for our answer, it's almost certianly correct

Answer 53

and yeah, ask your teacher. worst case we're wrong and you have bonus points

Answer 54

ok that would be cool lol

Answer 55

thx for helping me