Algebra Answers

If a*b means half the sum of a and b.
Evaluate
-8*20

If a*b means half the sum of a and b.
Then evaluate 4*6

2x+3=5 what is value of x

1. A group of 46 students were required to choose from Agric(A), Biology(B) and Chemistry (C) subjects. The following were their preferences: (A n B) n C' = 7,
(A n B) = 11, (A' n B n C') = 4, n(A) = 16, n(B) = 18, n(C) = 17 and (A u B u C)' = x.

a. Draw a venn diagram to illustrate the information.
b. Find the value of x.
c. Find the number of students who preferred
i. Only one of the subjects
ii. At most one of the subjects
iii. At least two of the subjects

a^4 • b^3 • a^-2•b^-5

a box contains 10 packs of quality cup a soup costing £4.60 calculate (the number of pence) per sachet

A lotus plat initially covers an area of 40cm2. The area is covers increases by 20% each week.
a)Does the area covered by the plant increase by a constant each week
b)Find out the function A(n)which represents the area covered by the lotus plant in n weeks
c)What does the graph of A(n) look like
d)What area is covered by the lotus plant in three weeks
e)How long will it take for the plant to cover an area of 100cm2

X+9=11 What is X?

A group of 46 students were required to choose from Agric(A), Biology,(B) and Chemistry(C) subjects. The following were their preferences:
(A n B) n C = 7, (A n B)= 11, ( A n B' n C') = 5, ( A' n B n C')= 4, n(A) =16,
n(B) = 18, n(C) = 17 and (A u B u C) = x. Draw a Venn diagram to Illustrate the information.

A man stole two gold from a village,he ran and came across a river.the bridge on the river can take a maximum of 160ibs..the man weigh 140ibs..and each of the gold bar weigh 20ibs.how will the man cross the river with the two gold bar