24. Written Problem. 12 is 25 % of what ?
Translate and solve. 12 = 0.25·x. x = 48.
25. Written Problem. Sec. 2.5. The top of a
building is a rectangle whose length L is 50 ft more than the
width W. The perimeter is 260 feet. What are the length L and width
W? See the method of quiz 5, #10. Same approach gives you W = 40 and L
= 90.
26. Written Problem. Sec. 2.3. Solve for a.
M = abc/6. a = 6M/bc
27. Written Problem. Sec. 2.3. Solve for y :
D = ay - by + cy + dy. Thus, D/(a - b + c + d)
= y
Below are extra credit
28. Solve for x. 5x + 22 =
57. x = 7
29. Solve for b. Q = (a
+ b )/3. 3Q - a = b
30. Solve for y: 2 - (4y
+ 6) = 4(y - 6) + 2y. y = 2