Answer:
Step-by-step explanation:
Ratio of adults to student is 2:5
If there are 12 more students than adults
Then, let adults be x
Then student is x+12
Total number =2x+12
Therefore,
Student =5/7 ×(2x+12)
x+12=(10x+60)/7
Cross multiply
7x+84=10x+60
7x-10x=60-84
-3x=-24
Divide both side by -3
x= -24/-3
x=8
The third option represent the solution.....
Answer: 3x-1(-5x)-3
Step-by-step explanation:
−3-x-1(-5x)+4x
-3+3x-1(-5x)
3x-1(-5x)-3
A: -vp + 30 < 45
Subtract 30 from both sides.
-vp < 15
Divide both sides by -v.
p > -15/v
( when dividing a negative, the < sign must be changed to >)
B. 3w - 6r = 30
Subtract 3w from both sides.
-6r = -3w + 30
Divide both sides by -6
r = (-3w + 30)/ -6
simplify the right side
r = (w - 10)/2
OR
r = (-3w/-6) + (30/-6)
r = w/2 - 5
No that wouldn't work.
e.g 1/2 + 1/2 would become 2/4 (which is equivalent to 1/2) if you just added the numbers, which can't be right.
You need to find equivalent fractions so that each fraction has the same number on the bottom (denominator) and then add ( or take away) the top numbers.
1/2 + 1/2 has same number on bottom, so just add top numbers to get 2/2 =1
so 1/4 + 1/2 has diff nos on bottom, so change 1/2 to 2/4.
1/4 + 2/4 = 3/4
2/3 - 1/4 = 8/12 - 3/12 = 5/12
You may need to ask your teacher about equivalent fractions.
P = 2(L + W)
P < = 42
L = 3W - 12
42 < = 2(3W - 12 + W)
42 < = 6W - 24 + 2W
42 < = 8W - 24
42 + 24 < = 8W
66 < = 8W
66/8 < = W
8.25 < = W
The greatest possible whole number is 8...ur width is 8 ft