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ollegr [7]
3 years ago
8

Your friend has $100 when he goes to the fair.he spends $10 to enter the fair and $20 on food.rides at the fair cost $2 per ride

.which function can be used to determine how much money he has left over after x rides
Mathematics
1 answer:
serg [7]3 years ago
4 0

Answer:

The answer is A f(x)=-2x + 70

Step-by-step explanation:

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a principal of $450 deposited in an account that pays 2.5% interest compounded yearly. find the account balance after 2 years​
faltersainse [42]

Answer:

The amount is $472.93 and the interest is $22.93.

Step-by-step explanation:

STEP 1: To find amount we use formula:

A=P(1+rn)n⋅t

A = total amount

P = principal or amount of money deposited,

r = annual interest rate

n = number of times compounded per year

t = time in years

In this example we have

P=$450 , r=2.5% , n=2 and t=2 years

After plugging the given information we have

AAAA=450(1+0.0252)2⋅2=450⋅1.01254=450⋅1.050945=472.93

STEP 2: To find interest we use formula A=P+I, since A=472.93 and P = 450 we have:

A472.93II=P+I=450+I=472.93−450=22.93

4 0
3 years ago
Read 2 more answers
Enter the coordinates of the vertex of the function f(x) = x2 + 4x - 7
elixir [45]

Given the equation of the function:

f(x)=x^2+4x-7

The given function represents a parabola

We will make a complete square to find the coordinates of the vertex

The coefficient of x = 4

Half the coefficient of x = 2

Square it give = 4

So, we will add and subtract 4

\begin{gathered} f(x)=x^2+4x+4-4-7 \\ f(x)=(x^2+4x+4)-11 \\ f(x)=(x+2)^2-11 \end{gathered}

Compare the last equation with the vertex form of the parabola

f(x)=(x-h)^2+k

So, h = -2, k = -11

So, the answer will be the coordinates of the vertex = (-2, -11)

6 0
1 year ago
19. Write an equation to represent the relationship
balandron [24]

Answer:

  y = x +3

Step-by-step explanation:

When you examine the table, you see that each y-value is 3 more than the corresponding x-value. This is represented in the equation ...

  y = x +3

8 0
2 years ago
A car is traveling at a speed of 45 kilometers per hour. What is the car's speed in kilometers per minute? How many kilometers w
oee [108]

Answer:

24 kilometers

Step-by-step explanation:

1.2 kilometers per minute; 12 kilometers

Step-by-step explanation:

We know that 60 minutes makes 1 hour.

Therefore, to convert the speed to kilometers per minute, we simply divide 72 kilometers per hour by 60 minutes:

72 / 60 = 1.2 kilometers per minute.

Distance is given as speed multiplied by time.

Therefore, in 10 mins, the car travels:

1.2 * 20 = 24 kilometers.

7 0
3 years ago
10.47kg AND THE OTHER IS 8.23kg. what is the difference????
lyudmila [28]

Answer:

2.24kg

Step-by-step explanation:

Difference=Subtraction

=10.47-8.23

=2.24

So therefore your answer must be 2.24kg

3 0
3 years ago
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