find c if c = a + b.

Answer:

A

Step-by-step explanation:

x= total number of sets bought

y= total cost

Since each set costs 3 dollars, we can represent that with the equation y=3x, and the teacher also had a 2 dollar coupon, so we can subtract 2 from the equation, giving us y=3x-2

So, by looking at the charts, plug in x (the input), and see if the y (output) is the same as the equation represents.

So, the answer is A. To test, plug in the x and see if it gives the right y.

For example, 3 sets bought (x), so it will be represented as,

y=3x-2

y=3(3)-2

y=7

So when 3 is x, y is 7. Which is what answer choice A shows.

Answer:

x=-4

Step-by-step explanation:

[tex]\frac{1}{2}[/tex](4x-6)+x-3=2(x-5)

  2x-3+x-3=2x-10

         3x-6=2x-10

       3x-2x=-10+6

               x=-4

Answer:

6

Step-by-step explanation:

When you multiply two negative numbers, the result becomes posititve

Answer:

58.33 miles per hour

Step-by-step explanation:

[tex]\frac{350Miles}{6Hours} =58.33mph[/tex]

I hope this help you

Answer:

i think its 5

Step-by-step explanation:

im not sure if its 5 or not but im guessing

bearing in mind that a function never has X-repeats, or namely the 1st value of each coordinate is never repeated, let's check these ones, who has an X-repeat and doesn't, Check the picture below.

Answer:

y=16x+36

Step-by-step explanation:

cleaning services start at $36 for one hour and add $16 to total price per hour.

16(1)+36=52

16(2)+36=68

16(3)+36=84

16(4)+36=100

Answer:

hello i am new to brainly. i am new to this app im just trynna figure this app

Step-by-step explanation:

Answer:

option 1 is correct .. triangle ABC is congruent to DEF..

Answer:

18.2 kilograms =

18,200 grams

Answer:

x = 5

Step-by-step explanation:

RS  +ST =  RT

2x + 10 + x - 4 = 21

2x + x + 10 - 4 = 21   {Combine like terms}

3x + 6 = 21

Subtract 6 from both sides

3x = 21 - 6

3x = 15

Divide both sides by 3

x = 15/3

x = 5

Answer:

5x-30=5(x-6)

Step-by-step explanation:

Answer:

B.    The axis of symmetry is x = 1.5 and the vertex is (1.5, 12.75).

Step-by-step explanation:

I will solve the problem by applying the perfect square trinomial. In this way we obtain the canonical form. Another way would be to derive the function, but I don't know if you're familiar with it.

First: let us take out the common factor: , since we remember that the canonical form is characterized as follows:

Then, it remains:

Then: the coefficient of the variable  We divided it between , And we square it (they will be one positive and one negative). In our case:

Let's accommodate terms to make it easier:

Can be written as :

Now, what is underlined is our perfect square trinomial, let us recall its form:

Applying the same principle we are left:

Applying distributive property we get:

Therefore it will have its vertex in:  

The axis of symmetry is a straight line that makes the function to be projected being , for this you need some reference point, for the parabola you need the coordinate in  of the vertex.

For which the axis of symmetry is .

-1.5

...............................................................................................................................................

Answer:

b

Step-by-step explanation:

Answer:

y = 2/3x - 7

Step-by-step explanation:

(3, -5) (-3, -9)

and y = -7 when x = 0  from graph

so c = -7

m = -9 - (-5)  / -3 - 3

= -4 / -6

= 2/3

line equation is y = mx + c

y = 2/3 x + (-7)

y = 2/3x - 7

[tex]\\ \sf\longmapsto m=\dfrac{-9+5}{-3-3}[/tex]

[tex]\\ \sf\longmapsto m=\dfrac{4}{6}[/tex]

[tex]\\ \sf\longmapsto m=2/3[/tex]

Now

Equation of line

[tex]\\ \sf\longmapsto y=mx+b[/tex]

[tex]\\ \sf\longmapsto y=\dfrac{2}{3}x-7[/tex]

Answer:

The difference between a relation and a function is that a relationship can have many outputs for a single input, but a function has a single input for a single output. This is the basic factor to differentiate between relation and function. Relations are used, so those model concepts are formed.

Answer:

Discount: $2.10

Final Cost: $11.90

Step-by-step explanation:

14 times 15% is 2.10.

So, you would take that $2.10 and subtract it from $14.00 to get your answer of $11.90

Answer:

m= -1

y intercept= 1

y= - x + 1

Step-by-step explanation:

Answer:

gawain sa pagkatuto bilang 2 balikan ang awiting bayan ko sa pahina 15 hanapin ang mga simbolong pangmusika sa awiting guhit ang mga nakita mong simbolong pangmusika sa iyong kwaderno

Answer:

For $1,200 at 14% for 24 months, Sally would be have to pay $57.62 per month, or $1,382.88 after 24 months. Neighbor Steve: For $800 at 32% for 16 months, Sally would have to pay $62.08 per month or $993.28 after 16 months. Even with the (much) higher interest rate, Sally would pay $389.60 less if she went with Neighbor Steve. Even better is that the monthly payments would be about the same for the given timelines. Sally would still want to weight the benefits of contracted work vs. non-contracted work.

Step-by-step explanation:

Answer:

Yes

Step-by-step explanation:

if you think of a slope equation, for example y= 3x + 2, if you do the opposite reciprocal, you would get-1/3 because you flip it around, and you flip the sign.

Answer:

where's the question? can you post a screenshot

Answer: plz mark me as a brainliest

Step-by-step explanation:

plz mark me as a brainiiest

Every year, the value of an antique vase appreciates by 20% of its value in the previous year. If the value of the vase was $180 000 in 2012, its value in 2010 was $125000

Step-by-step explanation:

Given the appreciation rate r, the initial value I, the final value V, and the period of appreciation n, the formula for appreciation is given by:

V = I(1 + r)ⁿ

In our case, we need to work out the value of n.

We do this as follows:

n =2012 - 2010 = 2 years

Substituting the values we have:

180000 = I(1.20)²

180000 = 1.44I

I = 180000/1.44

= 125000

So, in 2010, the value of the vase was $125000

Answer:

(28/27)

Step-by-step explanation:

Answer:

Exact Form:

28/27

Decimal Form:

1.037

Mixed Number Form:

1 1/27

Step-by-step explanation:

Answer: A. -300

Step-by-step explanation: I hope this helps!

Answer:

156 5 dollar bills

Step-by-step explanation:

Answer:

six hundred and five thousand

Step-by-step explanation:

Check the picture below.

[tex] {x}^{2} + {x}^{2} = {6}^{2} \: \: \: (by \: \: pythagoras \: \: \: theorem) \\ = > {2x}^{2} = 36 \\ = > {x}^{2} = \frac{36}{2} \\ = > {x}^{2} = 18 \\ = > x = \sqrt{18} \\ = > x = \sqrt{2 \times 3 \times 3} \\ = > x = 3 \sqrt{2 } \\ = > x = 4 .2[/tex]

Answer:

Answer:The length of the leg is 4.2 units.

Hope you could get an idea from it.

Doubt clarification - use comment section.

9514 1404 393

Explanation:

Vertex form of a quadratic can be written as ...

  a(x -h)² +k = 0 . . . . . . vertex (h, k); scale factor 'a'

First of all, it highlights the vertex (x, y) = (h, k), which is the extreme maximum or minimum of the function. That also tells you the axis of symmetry, (x = h).

Vertex form also shows you the vertical scale factor. The sign of that tells you whether the graph opens upward (positive) or downward (negative). The numerical value of it tells you the vertical distance from the vertex to points ±1 unit either side of the vertex.

The roots of the quadratic will be ...

  x = h ±√(-k/a)

These will be complex if the graph does not intersect the x-axis.

Answer:

From the vertex form  ()=(−)+ , you can find the vertex  (,)  and see whether the parabola opens upward (if  > ) or downward (if  < ). From a graph, you can read the coordinates of the vertex and substitute into the vertex form. With the coordinates of one other point, you can solve the equation to find a and write the equation of the quadratic function in vertex form.

Answer:

It's D

Step-by-step explanation: