Answer:
The number is 8.
Step-by-step explanation:
Let that "certain" number be x.
3x+4=28
3x=28-4
3x=24
x=24/3
x=8
Answer: 4:5
Step-by-step explanation: First find a number 12 and 15 can both be divided by. I found 3, and did the following:
12/3=4
15/3=5
The ratio of boys to girls in Luka's math class is 4:5
25.
$1,080x20/100=$216
$1,080-$216= $864
$864x8/100= $69.12
$864+$69.12= $933.12
26.
k+4/2=k+9/3
k(4/2)=k(9/3)
k/2=k/3
k=2x3
k=6
27.
59'F
