Step-by-step explanation:
This figure is not the best, but I'll try my best here
Since BC is parallel to BE (BC is part of BE) and BA is part of BD, two sides are parallel, making two angles congruent and the triangles therefore similar.
Since BA correlates to BD (they are parallel), we can use the knowledge that BA is 7 and BD is 42 to find the scaling factor to be 42/7 =6 from ABC to DBE. Since BC correlates to BE, BC = 10, and the scaling factor is 6, BC*6=BE= 60 = height
Answer:
-240
because you multiply 60 and 4 and you get 240 but it was a withdrawl
so that makes it a negative number.
Step-by-step explanation:
The correct answer would be 23% because 28+34+40+22=124, and if you do the butterfly method you would multiply 28 by 100 and you get 2800 then divide that by 124 and you get 22.5% but since you have to round to the nearest percent it's 23%
126 liters of pure water should be added
<em><u>Solution:</u></em>
Let "x" be the liters of pure water
Then, 18 + x is the liters of final solution
18 Liter solution of 80% acid, which means 100 - 80 = 20 % of water is used
Pure water is 100%
Then according to question, we can say,
"x" liters of pure water 100 % is mixed with a 18 liter solution of 20 % water to produce a mixture (18 + x) liter that is 90 % water
Thus we frame a equation as:
Equation:
water + water = water
Thus 126 liters of pure water should be added
5 + 2(2) = 5 + 4
5 + 4 = 9
The solution is 9