Answer:

Step-by-step explanation:
To solve this question, we will first expand the expression using the distributive rule: 
Therefore:

Simplify:

Add up like terms:

Sin = 14/50; 7/25 & tan = 14/48; 7/24, Hope this helps.
Answer:
45
Step-by-step explanation:
5 less than your number is at least 40. Let the number be x. So rephrasing the statement, 5 less than x is greater than or equals 40.
x-5 ≥ 40
x-5+ 5 ≥ 40+5 (adding 5 to both sides to single out the x in LHS)
∴x ≥ 45
In other words, x is at least 45.
Therefore, the minimum value of x is 45.
Answer:
b
Step-by-step explanation:
get y by itself in the second equation: y= 2x-3
substitute this into the y of the first equation:
2x+2x-3= 5
Answer:
80
Step-by-step explanation:
To have 16 more pages means he has 20% more of the book to cover if he has already covered 80%
Let the number of pages in the book be X
20% of X = 16
20/ 100. * X = 16
1/ 5 * X = 16 >>> X = 16 * 5 = 80 pages.