Maria sold 28 skateboards over the weekend at her toy store. this was 30% of all the skateboards she had in stock. how many skateboards were in stock?

Answer : 93 skateboards were in stock approximately.

Step-by-step explanation:

Concept of Percentage: by a certain percent, we mean how many hundredths.

Thus, x percent means x hundredths, written as x%

To express x% as a fraction: we have, x% = x/100

If we call S, the number of skateboards that we had in stock, and now they tell us that we have sold 30% of that amount, which were 28 units, this means:

S · 30/100 = 28 units

Then, S = 28·100/30 = 2,800/30 = 93.33 => aprox. 93 units

Answer : 93 skateboards were in stock approximately.

Verification:

We can calculate 30% of 93 skateboards

93 · 30/100 = 27.9 approximately = 28 skateboards



x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

you would need to know all the numbers that are on there

step-by-step explanation: