2(3x+7)-5(x+3)=0
6x+14-5x-15=0
x-1=0
x=1
Answer:
For this case we know that at the starting year 2000 the population was 9 billion and we also know that increasing with a double time of 20 years so we can set up the following model:
And if we solve for b we got:
And then the model would be:
Where y is on billions and t the time in years since 2000.
And for this equation is possible to find the population any year after 2000
Step-by-step explanation:
For this case we know that at the starting year 2000 the population was 9 billion and we also know that increasing with a double time of 20 years so we can set up the following model:
And if we solve for b we got:
And then the model would be:
Where y is on billions and t the time in years since 2000.
And for this equation is possible to find the population any year after 2000
Letter F
Because:
1/5 = 2/10
and
1/2 = 5/10
2/10+5/10=7/10
I think the answer to this one is 200 degrees. If I am wrong than I am sorry, I gave an educational guess.
Answer: BC is 9 units long
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Work Shown:
Let x be the length of segment BC.
BC is parallel to DE, so this means that triangle ABC is similar to triangle ADE.
Side AB pairs with side AD (both are horizontal sides of triangle ABC and triangle ADE respectively)
Side BC pairs with side DE (both are vertical sides of triangle ABC and triangle ADE respectively)
Because of those facts above, we can end up with this proportion
AB/AD = BC/DE
-------------------
Let's plug in the given values and isolate x
AB/AD = BC/DE
12/20 = x/15
12*15 = 20*x ... cross multiply
180 = 20x
20x = 180
20x/20 = 180/20 ... divide both sides by 20
x = 9
Segment BC is 9 units long.
note: There is no need to calculate the length of segment AE. Though you are correct in stating that AE = 25.