Answer:
C. 130
Step-by-step explanation:
90 + 40 + ? = 180
? = 50 (the remaining angle)
Therefore, x = (180 - 50)
x = 130
Thenks and mark me brainliest :))
Hello from MrBillDoesMath!
Answer:
(y+ 5/6)^2 = 169/36
Discussion:
3y^2+5y=12 => (divide both sides by 3)
y^2 + (5/3)y = 12/3 = 4 =>
Add\subtract the square of one-half the coefficient of y:
( y^2 + (5/3)y + (5/6)^2) - (5/6)^2 =4 (add (5/6)^2 to both sides)
(y^2 + (5/3)y + (5/6)^2 = 4 + (5/6)^2 =>
(y+ 5/6)^2 = 4 + (5/6)^2 = 4 + (25/36) =
(144+25)/36 = 169/36
So
(y+ 5/6)^2 = 169/36
We can also solve for y by taking the square root of both sides:
(y + 5/6) = sqrt(169/36)
= +\- 13/6 ( as 169 = 13*13 and 36 = 6*6)
y = (-5/6) +\- 13/6
Thank you,
MrB
Hello @Wpisd3039,
How are you doing? In this case,
The ball will strike the ground when h=0.-16t²+272t+1344=0t₁,₂=(-272+-√(272²+4*16*1344))/2*(-16)t₁,₂=(-272+-400)/(-32)t₁=(-272+400)/(-32)=-4 or t₂=(-272-400)/(-32)=21Time cannot be negative value so t₂ is solution. The ball will strike the ground in 21 seconds.
I hope I helped, Contact me if you need more assistance.
Thank you,
Darian D.<span />
Answer
Tyler to do the job alone =18/1 = 18 hrs
Solution
It takes Tyler twice as long as Kyle to complete the same job.
efficiency of Kyle is twice the efficiency of Tyler
Let x be the efficiency of Tyler the efficiency of Kyle is 2x
efficiency of Tyler : efficiency of Tyler = x :2x =1:2
Therefore total efficiency = 1 + 2 =3x
The total job = efficiency x total time
Here total time to complete the job=6 hrs
Total job =18
Time taken to complete the job =Total job/efficiency
Tyler to do the job alone =18/1 = 18 hrs
Kyle to do the job alone =18/2 = 9 hrs