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marusya05 [52]
2 years ago
9

The graph of which function will have a maximum and a y-intercept of 4?

Mathematics
2 answers:
rosijanka [135]2 years ago
4 0
The y-intercept of the equation is the value of the variable y or in this case, f(x), when x is equated to zero. Out of all the choices presented in this item, if x is equated to zero, the first two terms will be equal to zero, leaving the third term only for the numerical value of f(x). 

From the choices presented, the answer would be f(x) = -x2 + 2x + 4. Thus, the answer is the third choice, C. 
Luden [163]2 years ago
3 0

Answer:

f(x) = –x2 + 2x + 4 therefor C

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Sara has $1.30 less than double what Billy does. Sara has $53.72. How much money does Billy have?​
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Answer:

Billy has $27.51

Step-by-step explanation:

First let's set up an equation to solve this problem.

Assign a variable to Billy's amount. Let's make it x.

Then we just interpret the problem and solve:

2x - 1.30 = 53.72

     +1.30    +1.30

----------------------------

2x = 55.02

(Divide by 2 on both sides)

----------------------------

x = $27.51

2x = Billy's amount doubled

2x - 1.30 = Taking away 1.30 from double Billy's amount

53.72 = Sara's amount

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