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3 years ago

drew bought a chemistry book for $30. later that book was marked down by 20%. what was the cost of the book with the discount?

Mathematics

1 answer:

drek231 [11]3 years ago

3 0

Answer:

It would be 6 dollars

Step-by-step explanation:

20 percent of 30 dollars is 6 dollars.

If an item costs 30 dollars and it's on sale for 20 percent off, how much will you save? To figure this out, you need to find 20 percent of 30.

This is easy to do in your head. Think of what 10 percent would be. 10 percent of 30 would be the same as .10 x 30, or 3. So, 10 percent off is 3 dollars off.

20 percent is twice as much as 10 percent. If 10 percent off is 3 dollars, then 20 percent off would be 2 x 3 or 6.

20 percent of 30 dollars would be 6 dollars.

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If y – 18 = 14, what is the value of 3(y + 5)?

steposvetlana [31]

Y-18=14
y=14+18
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3(y+5)=?
All you have to do is figure out what y is and then substitute the value of y into the second expression.

3(32+5)=3(37)=111

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3 years ago

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The perimeter of a rectangular concrete patio is 34 meters. the area is 70 square meters. what are the dimensions of the patio?

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3 years ago

Which answer describes the type of sequence?

lianna [129]

The best and most correct answer among the choices provided by the question is the last choice "arithmetic"

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3 years ago

Find the point that is 1/5 the way from A to B where A(-7,4) and B(3, 10).

mestny [16]

Answer:

The coordinates of the point that is 1/5 the way from A to B is $(x,y) = (-5,\frac{26}{5})$

Step-by-step explanation:

Here, the given points are: A (-7,4) and B (3,10)

Let us assume the point M(x,y) on AB is such that

AM : AB = 1 : 5

⇒ AM : (AB - AM) = 1 : (5-1) = 1: 4

⇒ AM : MB = 1 : 4

Now, The Section Formula states the coordinates of point (x,y) on any line dividing the line in the ratio m1 : m2

$(x,y) = (\frac{m_2x_1+m_1x_2}{m_1+m_2} ,\frac{m_2y_1+m_1y_2}{m_1+m_2} )$

Here, in the given equation, m1: m2 = 1:4

So, the coordinates M(x,y) is given as:

$(x,y) = (\frac{(-7)(4) + 1 (3)}{1+ 4} ,\frac{4(4) + 1(10)}{1+4} )\\\implies (x,y) = (\frac{-28+3}{5} ,\frac{16+10}{5} ) = (\frac{-25}{5} ,\frac{26}{5} )\\\implies (x,y) = (-5,\frac{26}{5} )$

Hence, the coordinates of the point that is 1/5 the way

from A to B is $(x,y) = (-5,\frac{26}{5})$

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3 years ago

I need help plizzzzz

Nataly [62]

Try this dude i hope it is right

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2 years ago