The answer to the question is d
Answer:
x=1.8
Step-by-step explanation:
To solve this equation, we can use PEMDAS and the various properties.
First, use the distributive property on all parenthesis, since parenthesis come first.
4x-1+6x+6x+24=52
Now we can use the commutative property to add all like terms.
16x+23=52
Now just subtract on both sides.
52-23=29 so our equation is 16x=29
To isolate x, divide both sides by 16.
x=1.8 rounded up
Hope this helps!
Answer:
The first one is true. 5b+15=14
Step-by-step explanation:
(b+3)/7= 2/5
After cross-multiplication:
5(b+3)=2*7
5b+15=14
Answer:
approximately 0.2 days
Step-by-step explanation:
Flow is defined as:
Q = V/t
where Q is flow, V is volume, and t is time
Let's call Vr to the volume of the reservoir, then for the first channel:
Q1 = Vr/t1
Replacing with t1 = 1/3 of day:
Q1 = Vr/(1/3) = 3*Vr
Similarly, or the other channels:
Q2 = Vr/1 = Vr
Q3 = Vr/(2 1/2) = 2/5*Vr
Q4 = Vr/3
Q5 = Vr/5
When all channels are open, the time needed to fill the reservoir is:
Vr = t*(Q1 + Q2 + Q3+ Q4 + Q5)
Replacing with the previous equivalences:
Vr = t*(3*Vr + Vr + 2/5*Vr+ Vr/3 + Vr/5)
Vr = t*4.93*Vr
1/4.93 = t
0.2 = t
I believe it is B. I could be wrong but I am hoping that you get it right
