Answer: 130
In order to solve for <4, you need to know that supplementary angles add up to 180°.
<3 = 50
180 - 50
130
**For future questions**
1. The sum of the interior angles of a triangle is 180°
2. Alternate interior angles are congruent
3. The exterior angle of a triangle is the sum of the nonadjacent interior angles
See attachment below.
We have 20% and 70% salt solutions.
We need 9 liters of 50% salt solution.
"t" is liters of twenty % solution "s" is liters of seventy % solution
A) t + s = 9
B) .2t + .7s = (.5 * 9)
Multiplying A) by -.2
A) -.2t + -.2s = -1.8 Adding that to B)
B) .2t + .7s = (.5 * 9)
.5s = 2.7
s = 5.4 liters of 70% salt
A) t + 5.4 = 9
t = 3.6 liters of 20% salt
Source:
http://www.1728.org/mixture.htm
Answer:
32.5 square feet.
Step-by-step explanation:
The formula for a triangle is Base times height divided by 2. So, you must divided this shape into a square and a triangle. Now, we must find the base of the triangle, which is 3 and find the height of the triangle, which is 5. Multiply 5 by 3 to get 15. Divided by 2 by 15 to get 7.5. Then find the area of the square. Simply find the base of the square, which of 5 and find the height of square, which is also 5. Multiply 5 by 5 to get 25. Add, 25 to 7.5 to get 32.5.
Answer:
22
Step-by-step explanation:
We subtract their goal by their current amount (1000-403) to get 597. We know the class needs at least 597 more cans. We divide 597 (the total needed) by 28 (students) to get 21.3... cans per student. Since each student brings an equal number of cans, we must bring in 22 cans each, leaving us with 19 extra cans.
Answer:
B. 5 1/3
Step-by-step explanation:
5 4/12=5 1/3