PLEASE HELP WITH STEPS!!!!!!! ANSWER IN SCIENTIFIC NOTATION I WILL GIVE BRIANLIEST
1 answer:
Answer:
C.) 8.68686 ×
D.) 4.1688 ×
Step-by-step explanation:
For C.) you take 8.69 and multiply that by and you'll get 86900000
Then you take 3.14 and multiply that by and you'll get 31400
So then you take 86900000 and 31400 and subtract it...
86900000 - 31400 = 86868600 and you convert 86868600 to scientific Notation.
Which would equal **** 8.68686 × *****
For D.) you take 4.32 and multiply that by and You'll get 4320
then you take 9.65 and multiply that by and you'll get 0.0965
So then you take 4320 and 0.0965 and subtract it...
4320 - 0.0965 = 4319.9035 and you convert 4319.9035 to Scientific Notation.
Which would equal **** 4.1688 × ****
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Answer:
(-2.2, -1.6), (3, 1)
Step-by-step explanation:
You don't have to go far to find the equations. They are right there in your problem statement. Perhaps you want to find the solutions to the equations.
Use the first equation to write an expression for x, then substitute that into the second equation:
x = 2y +1
y^2 -3(2y+1)(y) +8 = 0
-5y^2 -3y +8 = 0
-(5y +8)(y -1) = 0
y = -8/5 or y = 1
The corresponding values of x are ...
x = 2(-8/5)+1 = -11/5
x = 2(1) +1 = 3
The solutions are (x, y) = (-2.2, -1.6) and (3, 1).
