You can set up a simple algebraic equivalent to find a number equivalent to 200 after being multiplied by 3 and added 11 to.
3x+11=200
3x=189
x=63
Had to edit! Realized what I had done wrong
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
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-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
2. 30, 24, 34, 28,
Pattern: Subtract 6, Add 10
3. 19, 18.75, 18.5, 18.25
Pattern: Subtract .25
4. 42, 56, 72, 90
This pattern is hard to explain...
1st number: 1 x 2 (2)
2nd number: 2 x 3 (6)
3rd number: 3 x 4 (12)
And so on.
Answer:
10%
Step-by-step explanation:
, so the probability is 10%. Hope this helps!
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