anonymous
  • anonymous
ok what is 14. Solve the area formula for a trapezoid, , for .
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
it is A=1/2h(b1+b2)for b1
anonymous
  • anonymous
A=0.5*h*(b1+b2) 2A/h=b1+b2 b1=2A/h-b2
anonymous
  • anonymous
what?

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anonymous
  • anonymous
Well, from your partially written out question, I assumed you want to solve the trapezoid formula for b1.
anonymous
  • anonymous
no that is the question that my techer gave me
anonymous
  • anonymous
So what is your question?
anonymous
  • anonymous
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
anonymous
  • anonymous
i mean right
anonymous
  • anonymous
None of them are right...
anonymous
  • anonymous
yes i got it it is b1=AH-b2
anonymous
  • anonymous
i mean it hase to be
anonymous
  • anonymous
Why? Try going from that back to the area formula for a trapezoid.
anonymous
  • anonymous
ok
anonymous
  • anonymous
i got b2=1/2hb1a
anonymous
  • anonymous
Write out your steps? I swear you need a subtraction in there somewhere.
anonymous
  • anonymous
me to
anonymous
  • anonymous
b1= 1/2AH-b2
anonymous
  • anonymous
i do not get any of it
anonymous
  • anonymous
can you help
sandra
  • sandra
hey taking a look
sandra
  • sandra
so what was given was the first line? b1 = 2Ah – b2
anonymous
  • anonymous
14. Solve the area formula for a trapezoid
sandra
  • sandra
ah ok so this is the formula of the trapazoid? t is A=1/2h(b1+b2)for b1
sandra
  • sandra
2A = 1/2h(b1+b2)
sandra
  • sandra
err sorry 2A/h = b1+ b2
sandra
  • sandra
b1 = 2A/h - b2
anonymous
  • anonymous
but how
anonymous
  • anonymous
that is what i do not get
sandra
  • sandra
ok so 1. A=1/2h(b1+b2) 2. A = h/2(b1 + b2) (another way to write 1/2h is h/2)
sandra
  • sandra
now we want to multiply both sides by 2
sandra
  • sandra
and we get 3. 2A = h(b1 + b2)
sandra
  • sandra
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
sandra
  • sandra
so 2A/h = h(b1+b2)/h
sandra
  • sandra
and since we know h/h = 1, we can get rid of h on the right side
sandra
  • sandra
so 2A/h = b1+b2
sandra
  • sandra
so now, to get b1 by itself, we need to subtract b2 from both sides
sandra
  • sandra
so 2A/h - b2 = b1+b2-b2
sandra
  • sandra
that eliminates the b2 on the right side, and leaves b1 alone
anonymous
  • anonymous
oh ok
sandra
  • sandra
sp 2A/h - b2 = b1, or b1 = 2A/h - b2
anonymous
  • anonymous
ok i am starting to get it
sandra
  • sandra
but as far as the options go on your multiple choice - I don't see any that match
anonymous
  • anonymous
ok i will contact my techer
anonymous
  • anonymous
tomorrow
sandra
  • sandra
ok sorry =(
sandra
  • sandra
you could try inputting different values for b1 and b2
sandra
  • sandra
and h
sandra
  • sandra
and see which answer matches the from the choices and the original equation
anonymous
  • anonymous
ok
sandra
  • sandra
but I would do it with our answer first
sandra
  • sandra
and see if they match up to the original area equation
sandra
  • sandra
if different values of b1,h, and b2 are always equal for our answer, it's almost certianly correct
sandra
  • sandra
and yeah, ask your teacher. worst case we're wrong and you have bonus points
anonymous
  • anonymous
ok that would be cool lol
anonymous
  • anonymous
thx for helping me

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