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3 years ago

The table and graph show that each banana at a market costs $0.27.

Mathematics

2 answers:

Tema [17]3 years ago

5 0

Answer:

A or The number of bananas is the independent variable, and the cost in dollars is the dependant variable.

Step-by-step explanation:

this is true because if you input 1 bananna which is the independent you get output .27 or dependant.

muminat3 years ago

5 0

Answer:

I think it is A correct me if I am wrong

Step-by-step explanation:

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It costs a dollars for an adult ticket to a reggae concert

brilliants [131]

the answer is C.

12a -18s =36

(12 adult tickets= 12a) - (18 student tickets =18s) =$36

5 0

3 years ago

A bridge in the shape of an arch connects two cities separated by a river. The two ends of the bridge are located at (–7, –13) a

sdas [7]

Answer:

$y=-\dfrac{13}{49}x^2$

Step-by-step explanation:

The shape of an arch corresponds to a parabola.

the general equation for a parabola is:

$y=ax^2+bx+c$

we're given three coordinates: (-7,-13),(7,-13) and (0,0)

so we can plug these values in the general equation to make 3 separate equations:

(x,y) = (-7,-13)

$-13=a(-7)^2+b(-7)+c$

$49a-7b+c=-13$

(x,y) = (7,-13)

$-13=a(7)^2+b(7)+c$

$49a+7b+c=-13$

(x,y) = (0,0)

$0=a(0)^2+b(7)+c$

$c=0$

so we have three equations. and we can solve them simultaneously to find the values of a,b, and c.

we've already found c = 0, let's use substitute it to other equations.

$49a-7b+c=-13\quad\Rightarrow\quad49a-7b=-13$

$49a+7b+c=-13\quad\Rightarrow\quad49a+7b=-13$

we can solve these two equation using the elimination method, by simply adding the two equations

$\quad\quad49a-7b=-13\\+\quad49a+7b=-13$

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

$\quad\quad 98a=-26$

$\quad\quad a=-\dfrac{13}{49}$

Now we can plug this value of a in any of the two equations.

$49a-7b=-13$

$49\left(-\dfrac{13}{49}\right)-7b=-13$

$-13-7b=-13$

$-7b=0$

$b=0$

We have the values of a,b, and c. We can plug them in the general equation to find the equation of the arch.

$y=\left(-\dfrac{13}{49}\right)x^2+0x+0$

$y=-\dfrac{13}{49}x^2$

$49y=-13x^2$

This our equation of the arch!

5 0

3 years ago

Match each expression to its simplified form 9(x+2)

morpeh [17]

Answer:

You forgot to add a picture-

Step-by-step explanation:

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meriva

Answer:

a=9

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ycow [4]

Answer:

C=47

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Step-by-step explanation:

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