Answer:
56 total
Step-by-step explanation:
Let the number of girls = x
Let the number of boys = 3x
x 1
=== = ==========
x + 28 3
Cross multiply
3x = x + 28 Subtract x from both sides
3x - x = 28 Combine
2x = 28 Divide by 2
x = 28/2
x = 14
Girls = 14
Boys = 14 + 28 = 42
Is the ratio 3 to 1?
42/14 = 3/1 Yes it does
Total number
14 + 42 = 56
Answer:
67 - 5 = 62
67+5 = 72
Step-by-step explanation:
the real life scenario has been described under this paragraph. take note that I used a number which when added to another number gives 72, and when I subtract this number from the other number, I also get 62
let's assume that a teacher carries out a study in his class and found out that 67percent of his students support indoor sporting activities, if there is an error of 5%, find the minimum and also the maximum percentage of students who are in favor of indoors sporting activities.
|x - 67| = 5
such that
x = 67 +-5
x = 67+5 = 72
x = 67-5 = 62
x= 62, x = 72
Answer:
3x+2Y=10
6×-5-1×=0
Step-by-step explanation:
6-5-1=0
Answer:
DE = 11
Step-by-step explanation:
DE = x + 7
EF = 7
DF = 4x + 2
DF = DE + EF (segment addition postulate)
Substitute
4x + 2 = x + 7 + 7
4x + 2 = x + 14
Collect like terms
4x - x = -2 + 14
3x = 12
Divide both sides by 3
x = 12/3
x = 4
✔️DE = x + 7
Plug in the value of x
DE = 4 + 7
DE = 11
