Answer:
x = ± 
Step-by-step explanation:
Given
2x² - 9 = 11 ( add 9 to both sides )
2x² = 20 ( divide both sides by 2 )
x² = 10 ( take the square root of both sides )
x = ± ← exact solutions
Answer:the number of kids that used the public pool that day is 122
the number of adults that used the public pool that day is 92
Step-by-step explanation:
Let x represent the number of kids that used the public pool that day.
Let y represent the number of adults that used the public pool that day.
214 people used a public swimming pool. This means that
x + y = 214
1.50 for kids and $2.25 for adults. The receipt totaled to $390. This means that
1.5x + 2.25y = 390 - - - - - - - - - -1
Substituting x = 214 - y into equation 1, it becomes
1.5x
1.5(214 - y) + 2.25y = 390
321 - 1.5y + 2.25y = 390
- 1.5y + 2.25y = 390 - 321
0.75y = 69
y = 69/0.75 = 92
Substituting y = 92 into x = 214 - y, it becomes
x = 214 - 92 = 122
They call it the Whirl Series ^.^
Jeremy will pay $41.05 interest.
We know that, Interest = PRT/100
where,
P = principal
R = rate
T = time
For given question, principal (P) = $325.18
interest rate R = 12 5/8%
= 12.625%
And period T = 1 year
We need to find the interest.
⇒ Interest = PRT/100
⇒ Interest = (325.18 × 12.625 × 1) / 100
⇒ Interest = 4105.3975 / 100
⇒ Interest = $41.05
Therefore, Jeremy will pay $41.05 interest.
Learn more about the interest here:
brainly.com/question/15052754
#SPJ4
