Dan bought these items for
school: 2 pens at $0.75 each, 1
notebook at $1.99, a package of
pencils for 25 cents. How much
change would Dan get if he gave the
cashier a 5 dollar bill?

Answer:

1 and 3 not function

2 is function

Step-by-step explanation:

Plz mark as brainliest and follow me plz

Answer: It is not a function.

Step-by-step explanation:

A function is something that "eats" an input and transforms it into an output.

We write them as y = f(x)

Where x is the input, and y is the output.

Now, a function has an important rule, for each input x, the function can only "transform it" (or map it) into only one possible output.

This means that, for example, if we have, for x = x1.

And a single

f(x1) = y1

f(x1) = y2

where y1 and y2 are different values.

Then this is not a function, because it is mapping the value x1 into two different outputs.

In this case, we would have:

f(Z) = A.

So Z is the input, but we know that a ZIP code works for an entire city, and in a given city we have lots of different street addresses, then for a single value of the input, Z, we have a lot of possible values of the output.

This means taht the set (Z, A) can not represent a function.

Answer:

all of the expressions are probably random so I have no idea

Answer:

[tex]y = 3(x +21)[/tex]

Step-by-step explanation:

Find the inverse this equation:

[tex]f(x) = (\frac{1}{3}x) - 7[/tex]

-Take the variable [tex]y[/tex] for [tex]f(x)[/tex], because both

[tex]y = (\frac{1}{3}x) - 7[/tex]

-Switch both variable [tex]x[/tex] and [tex]y[/tex] :

[tex]y = (\frac{1}{3}x) - 7[/tex]

[tex]x = (\frac{1}{3}y) - 7[/tex]

-Solve for [tex]y[/tex] :

[tex]x = (\frac{1}{3}y) - 7[/tex]

-Switch sides:

[tex]\frac{1}{3}y - 7 = x[/tex]

-Add both side of the equation by [tex]7[/tex] :

[tex]\frac{1}{3}y - 7 + 7 = x + 7[/tex]

[tex]\frac{1}{3}y = x + 7[/tex]

-Multiply both sides by [tex]3[/tex] :

[tex]\frac{\frac{1}{3}y}{\frac{1}{3} } = \frac{x + 7}{\frac{1}{3} }[/tex]

[tex]y = \frac{x + 7}{\frac{1}{3} }[/tex]

-Divide [tex]x + 7[/tex] by multiplying by [tex]\frac{1}{3}[/tex]

[tex]y = \frac{x + 7}{\frac{1}{3} }[/tex]

[tex]y = 3(x +21)[/tex]

Therefore, the answer is [tex]y = 3(x +21)[/tex].

Answer:

9

Step-by-step explanation:

Empowerment is easy to know how to resolve one operation of this.

In empowerment there are 3 parts, base, exponent and power.

But in this case there is 1 additional, the sign, that is important to define the power.

In this case the 3 is the base, the exponent is 2, and the sign -

To resolve this operation you need to multiply the base by the times there are on the exponent, if there is a 2 like exponent, you multiply 2 times 3:

3x3 = 9

But because the sign, change the multiplication, if the sign is on base is:

-3x-3 = 9

The 2 operation give the same result because on negative rules, on multiplication, even negative numbers give always positive result and odd negative numbers give always negative result.

Then the power is 9

Hope I helped

Answer: 2 + 2   x =2

Step-by-step explanation:

x + 2

x=2

2+2

Hey there!☺

[tex]Answer:\boxed{4}[/tex]

[tex]Explanation:[/tex]

[tex]x+2[/tex] when x = 2

Since x is 2, you just have to add it with the number that you need to add with.

[tex]x+2\\x(2)+2=4\\2+2=4[/tex]

4 is your final answer.

Hope this helps!

Answer: 15

Step-by-step explanation: 5 roses are 25 dollars so what your going to do is multiply 5 by 3 to get 15 do the same with 25, 25 x 3 is 75 so you will get 15 roses for 75 dollars

Answer:

1) x=14

2) n=21/8=2.625

Step-by-step explanation:

1)

So we have the equation:

[tex]\frac{x}{16}-\frac{1}{2}=\frac{3}{8}[/tex]

First, let's remove all the fractions. Multiply both sides by the LCM of 16, 2, and 8, which is 16. So:

[tex]16(\frac{x}{16}-\frac{1}{2})=16(\frac{3}{8})[/tex]

Distribute:

[tex]16(\frac{x}{16})-16(\frac{1}{2})=16(\frac{3}{8})[/tex]

Simplify:

[tex]x-8=6[/tex]

Add 8 to both sides:

[tex]x=14[/tex]

So, the value of x is 14.

2)

We have:

[tex]\frac{3n}{7}-1=\frac{1}{8}[/tex]

Again, let's remove the fractions by multiplying both sides by the LCM of 7 and 8, which is 56. So:

[tex]56(\frac{3n}{7})-56(1)=56(\frac{1}{8})[/tex]

Simplify:

[tex]24n-56=7[/tex]

Add 56 to both sides:

[tex]24n=63[/tex]

Divide both sides by 24:

[tex]n=63/24[/tex]

Reduce:

[tex]n=21/8=2.625[/tex]

And we're done!

Answer:

yes

Step-by-step explanation:

Answer:

B is the answer to f(x)= |x+6|

Step-by-step explanation:

I used desmos for these types of problems and looked at the table.

Answer:

-32 is what i got

Step-by-step explanation:

Answer:

m= -1/7  (slope)

b= -1 (y inter)

Step-by-step explanation:

Answer:

Fraction: 8 [tex]\frac{11}{20}[/tex]

Decimal: 8.55

Step-by-step explanation:

8 11/20 is the answer because:

1) Since 8 is the whole number, 8 wouldn't be part of the fraction

2) The numerator is the top number in the fraction, so 11 is at the top since 11 is the numerator

3) The denominator is the bottom number in the fraction, so 20 is at the top since 20 is the denominator

8.55 is the answer because:

1) Since 8 is the whole number, 8 would be in front of the decimal point

2) When you multiply the fractions, you have to multiply until you get a hundred. Therefore, 20*5 = 100 and 11*5 = 55

Hope this helps!

Answer:

real number

Step-by-step explanation:

Answer:

True

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

∠GMP  and ∠AMP  are linear pair

∠EPM  and ∠CPM are linear pair

Answer:

227.5

Step-by-step explanation:

Find the number that is increased by 30% to get to 325.  

100-30 = 70.

In other words, what number is 70% of 325.

325 x .70 = 227.5

The original price of the ring was 227.5.

Check your work, 227.5 = 70% of X

227.5  / .70  = 325

Answer:

The cost before the increase is £250.

Step-by-step explanation:

Given that after 30% increases, the cost of the ring is £325 so we can assume that 130% is £325. Now, we have to form an expression in term of x where x represents the original cost :

[tex] \frac{130}{100} \times x = 325[/tex]

Next, we have to solve it :

[tex]x = 325 \div \frac{130}{100} [/tex]

[tex]x = 325 \times \frac{100}{130} [/tex]

[tex]x = 250[/tex]

Answer:

4√20

Step-by-step explanation:

√40 = √4 * √10 = 2√10

4√20 > 2√10

then:

the greater is:

4√20

Answer:

yoi look for what you add to the equation to make it a perfect square by dividing 6 by 2 then add 2^2 to both sides.

Answer:

17x + 10r -5

Step-by-step explanation:

15x +3 + 2x + 9r- (8-r)

17x +3 +9r -8 +r

17x+ 10r+ -5

Answer:

6/2 + 6/8

3/1 + 3/4

12/4 +4/4

that is 1

Answer:

3,000.75

Step-by-step explanation:

this is the answer

Answer:

A. Yo tambien.

Step-by-step explanation:

There is no explanation. I'm not sure why this was in the math section.

Answer:

Average rate of change = 5

Step-by-step explanation:

steps

(x) = 5x^2-3x+7

refine

x=5x^2-3x+7

Switch sides

5x^2-3x+7-x=x-x

Subtract x from both sides

5x^2-4x+7=0

Solve with the quadratic formula

Answer:

13 dollars

Step-by-step explanation:

5 x 2= 10+3=13

Answer:

-[tex]3t^{3}[/tex][tex]-6t^{2}[/tex]+4t

Step-by-step explanation:

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{ { - 3t}^{3} - 6 {t}^{2} + 4t}}}}}[/tex]

Step-by-step explanation:

Given terms : + 4t , -6t² , -3t³

Arrange the terms from biggest exponent to lowest exponent:

[tex] \dashrightarrow{ \boxed{ \sf{ - 3 {t}^{3} - 6 {t}^{2} + 4t}}}[/tex]

Hope I helped!

Best regards! :D

Answer:

6 pm if you're saying in half a hour. 7 if you're saying an hour and a half

Step-by-step explanation: