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2 years ago

If five slices of pizza cost $5.50, how much do two cost? Ten cost? Half a slice cost?

1 answer:

4 0

So you work out what each one cost which is $1.10 so $1.10 times two is $2.20 so two cost $2.20 ten cost $11.00 half a slice costs 55 cents

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Find the inverse of f(x)=−3/2x+7/2.

timama [110]

Answer: $f^{-1}(x)=-\frac{2}{3}x+\frac{7}{3}$

Step-by-step explanation:

To find the inverse of a function, you want to replace x with y and y with x. Then, you solve for y.

$y=-\frac{3}{2}x+\frac{7}{2}$ [replace y with x and x with y]

$x=-\frac{3}{2}y+\frac{7}{2}$ [subtract both sides by 7/2]

$x-\frac{7}{2} =-\frac{3}{2}y$ [multiply both sides by -2/3]

$-\frac{2}{3} (x-\frac{7}{2} )=y$ [distribute]

$y=-\frac{2}{3}x+\frac{7}{3}$

Now, we have our inverse function.

$f^-^1(x)=-\frac{2}{3}x+\frac{7}{3}$

7 0

3 years ago

The theater sells two types of tickets: adult tickets for $6 and child tickets for $4.

andrey2020 [161]

Answer:

237

Step-by-step explanation:

This is a system of equations.

The theater sold 364 adult and child tickets, so a + c = 364

They made a total of $1930. Each adult ticket was $6 & child tickets were $4. The second equation is 6a + 4c = 1930.

Let's line them up

a + c = 364

6a + 4c = 1930

Since we need to solve for the number of adult tickets, we want to get rid of the c variable. I'm going to multiply the entire first equation by -4 to do this. The second equation stays the same. Now, I have:

-4a - 4c = -1456

6a + 4c = 1930 Add them together

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

2a = 474 Divide by 2 to solve for a

a = 237

There were 237 adult tickets sold

4 0

1 year ago

How do you write the equation for intercept (4,-3), m=-1

nata0808 [166]

Answer:

y=-1x+-3

Step-by-step explanation:

y=mx+b

y=-1x+-3

6 0

2 years ago

Law of indices question<br>

xenn [34]

The first law: multiplication

The second law: division

The third law: brackets

Negative powers

Power of zero

Fractional powers

3 0

3 years ago

Find the sum of 5a and -9a

kari74 [83]

Answer:

-4a

Step-by-step explanation:

5a + -9a = -4a

hope this helps

7 0

2 years ago

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