There are 144 people in an audience. The ratio of adults to children is 5 to 3. How many are adults? Please help!

90 adults

Step-by-step explanation:

5+3=8

144/8=18

18 x 5 = 90

Let the Adults be 5x and children be 3x,

then,

ATQ,

5x+3x=144

8x=144

x =144/8

x =18

so

the no.of adults= 18 multiplied by 5= 90

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.