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3 years ago

Erica had 6 coins in her coin collection. she goes to a coin show and buys some coins. how many dose she have now?

Mathematics

2 answers:

rewona [7]3 years ago

8 0

It doesnt say how many she buys at the coin show so we dont know but its going to be more than 6

Marina86 [1]3 years ago

8 0

I think erica has 7 coins in her coin collection.

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Need help solving -13 + 2c + 5c + 2

german

Answer:

7c - 11

Step-by-step explanation:

To solve this, you are going to need to add like terms.

Since 5 and 2 both have a "c" next to them, you can add those together to equal 7c.

Then, since -13 and 2 do not have a "c", you can combine those together to equal -7.

Since there is no = , the closest you can get to solving this equation would then be 7c - 11.

Hope this helped!

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2 years ago

Find the equation of the axis of symmetry of the following parabola algebraically.

mr Goodwill [35]

Answer:

the equation of the axis of symmetry is $x=8$

Step-by-step explanation:

Recall that the equation of the axis of symmetry for a parabola with vertical branches like this one, is an equation of a vertical line that passes through the very vertex of the parabola and divides it into its two symmetric branches. Such vertical line would have therefore an expression of the form: $x=constant$ , being that constant the very x-coordinate of the vertex.

So we use for that the fact that the x position of the vertex of a parabola of the general form: $y=ax^2+bx+c$ , is given by:

$x_{vertex}=\frac{-b}{2\,a}$

which in our case becomes:

$x_{vertex}=\frac{-b}{2\,a} \\x_{vertex}=\frac{48}{2\,(3)} \\x_{vertex}=\frac{48}{6} \\x_{vertex}=8$

Then, the equation of the axis of symmetry for this parabola is:

$x=8$

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3 years ago

Bill is a used car salesman. He sells a used automobile for $15,799. If he receives a 4%

Scrat [10]

Answer: 4 cents or .4

Step-by-step explanation:

Whenever in a problem like this where there is a fee, tax, and or bonus you move the decimal in front of the number and round to the nearest penny but if there is only one number in front of the decimal you don’t gotta do anything with it unless its .5 or higher but .4 and below you keep the same.

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2 years ago

PLEASE HELP I WILL MARK BRAINLEIST

icang [17]

Answer:

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Step-by-step explanation:

Set up a proportion where x is the number of millimeters for 160 kilometers

$\frac{5}{32}$ = $\frac{x}{160}$

Cross multiply and solve for x:

32x = 800

x = 25

So, 25 millimeters represent 160 kilometers

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3 years ago

What are rights a teacher has

Lorico [155]

Answer:

Teachers have the right to be free from discrimination based on race, sex, and national origin. As well as freedom of expression, academics, privacy, and religion.

Good luck! Hope this helped :)

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3 years ago

Read 2 more answers