Answer:
45 girls
Step-by-step explanation:
- Remark
- There are only 2 choices for gender. So if the class is 60% girls, the there must be 100 - 60 = 40% for the boys.
- But we are told that the boys are 30 in number.
- Let x = the total number of students.
Solution
- 40/100 * x = 30 Change the % to a decimal
- 0.4 x = 30 Divide both sides by 0.4
- 0.4 x / 0.4 = 30 / 0.4 Do the division
- x = 30/0.4
- x = 75 students in total
Formula
Total of Boys and Girls = Number of boys + number of girls.
Givens
- Total = 75
- Number of boys = 30
Solution II
- 75 = x + 30 Subtract 30 from each side
- 75 - 30 = x +30 - 30
- 45 = x
- There are 45 girls in the class.
Answer: x-int: (-1/2,0)
y-int: (0,-1/4)
Step-by-step explanation:
x-5y+3=3x-y+4
x-int: x-5(0)+3=3x-0+4
x+3=3x+4
-2x=1
x=-1/2 ==>(-1/2,0)
y-int: 0-5y+3=3(0)-y+4
-5y+3=-y+4
-1=4y
y=-1/4 ==>(0,-1/4)
It’s not an equation but the shorter piece would be 28 inches and the longer piece would be 56 inches
Answer:0.68
Step-by-step explanation: 0
+0.6
+0.08
Answer:
(9,3)
Step-by-step explanation:
4(.25x + .5y = 3.75) → x + 2y = 15
(4x – 8y = 12) → x – 2y = 3
2x = 18
Divide both sides by 2
x = 9
Substitute x = 9 into x + 2y = 15
9 + 2y = 15
Subtract 9 from both sides
2y = 6
Divide both sides by 2
y = 3
Solution
(9, 3)
