Answer:
92°
Step-by-step explanation:
∠C=180-140=40
∠A+∠B+∠C=180
40+2X+X+2=180
X=46
∠B=46*2=92°
Answer:
26.67
Step-by-step explanation:
Take the total amount per day and multiply by the fraction of the day that she worked
80 *1/3 =26.66666
Rounding to the nearest cent
26.67
First off, let's change the format of the percentage to decimal.. so 35% is just 35/100 or 0.35 and 40% is 40/100 or 0.4 and so on.

now, whatever "x" amount is, we know that x + 10 must add up to "y". x + 10 = y, because both quantities added will give the mixture amount.
and whatever 0.35x + 4 = 0.37y, because both concentrated amounts must give the 37% of the mixture.

solve for "x", to see how much of the 35% solution will be needed.
what about "y"? well, x + 10 = y.
Y = 5(x+4)-6
x = 5(y+4)-6
x = 5y +20 - 6
x= 5y +14
5y = x-14
y = (x-14)/5
<span>
when x = 19, y = (19-14)/5 </span>
y = 5/5
<span>y=1
In short, Your Answer would be Option 2
Hope this helps!</span>