Answer:
31 children and 290 adults
Step-by-step explanation:
Let a = number of adults and c = number of children.
a + c = 321
2a + 1.75c = 634.25
Multiply both sides of the the first equation by -2 and add it to the second equation.
-2a - 2c = -642
(+) 2a + 1.75c = 634.25
--------------------------------------
-0.25c = -7.75
Divide both sides by -0.25
c = 31
Use the first equation to find a.
a + c = 321
Substitute 31 for c.
a + 31 = 321
Subtract 31 from both sides.
a = 290
Answer: 31 children and 290 adults
The answer is A, the first one :)
7.90 not 100 percent sure though.
To get the fraction of blue squares with stripes we shall proceed as follows;
fraction of blue squares=1/2
1/3 of the blue squares have stripes, therefore we shall have:
fraction of blue square with stripes
=1/3 of 1/2
=1/3×1/2
=1/6
Hence we conclude that the fraction of blue squares with stripes was 1/6 of the total colored squares.
