Total marks she'll need to score for an average of 70: 70×5= 350
Score she needs for the 5th test: 350-60-90-90-70=40
She needs to score 40 marks.
Answer:
5/6
Step-by-step explanation:
3/4 = 18/24
5/6 = 20/24
Yes in order for them to be symmetrical they both have to be Symmetrical or the same
Ok so you have your two equations:
(1) 2x + 3y = -11 (I am assuming you meant 2x + 3y instead of 2x + 3x at least?)
(2) x - y = 12
x = y + 12
If we substitute equation (2) into equation (1) we get:
2(y + 12) + 3y = -11
2y + 24 + 3y = -11
5y = -35, therefor y = -7
If y = -7, from equation (2) we get:
x = -7 + 12 = 5
Answer:
Step-by-step explanation:
837 are females as 52.5 percent of 1800 equals 837.