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2 years ago

A book is marked down by 28 percent from an original price of $19.50. What is the new price?

Mathematics

2 answers:

LiRa [457]2 years ago

7 0

Hi the new price is $14.04

kupik [55]2 years ago

3 0

Step-by-step explanation:

First find 28% of $19.50:

($19.50) / (100) × (28) = $5.46

Now minus the 285 from the original price:

($19.50) - ($5.46) = $14.04

The answer is $14.04

Hope it helped :)

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Twice the sum of a number, n, and seven is four less than the quotient of a number, n, and three.

deff fn [24]

Answer:

Step-by-step explanation:

$2(n+7)=\frac{n}{3}-4\\ \\ 2n+14=\frac{n-12}{3}\\ \\ 6n+42=n-12\\ \\ 5n+42=-12\\ \\ 5n=30\\ \\ n=6$

3 0

2 years ago

The perimeter of a rectangle is 54 meters. One side is three meters less than four times the length of the other side. Find the

Elenna [48]

Answer:

6 and 21 meters long

Step-by-step explanation:

You make an equation from what you got (there are 2 widths and 2 lengths)

2(4w-3)+2w=54---->10w-6=54---> 10w=60 ----> w=6 ---> plug in the rest and you get 21 as the length.

or... make W+L=28 and guess and check!!! takes longer but works!

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2 years ago

a rectangle has an area of x2+8x+15 square meters and a width of x+3 what expression represents the length of the rectangle

anzhelika [568]

Answer:

1x + 5

Step-by-step explanation:

Since the area of a rectangle of width w and length l is A = l*w,

length = Area / Width.

Here, x^2 + 8x + 15

length of rectangle = ----------------------

x + 3

Use synthetic division to perform the above. The coefficients of the quadratic are a = 1, b = 8 and c = 15, and the divisor is -3 (from (x + 3).

-3 / 1 8 15

-3 -15

-------------------------

1 5 0

Since the remainer is zero (0), -3 is a root and 1x + 5 is a factor of the quadratic. This factor, representing the length of the rectangle, is 1x + 5.

Next time, kindly share the answer choices. Thank you.

6 0

2 years ago

QveST [7]

Answer: 9 L

Step-by-step explanation:

Given

The dimension of the rectangular container is $40\times 30\times 25\ cm^3$

It is filled with $\frac{3}{5}$ of the height

Water present in the container

$\Rightarrow 40\times 30\times 25\times \dfrac{3}{5}\\\\\Rightarrow 18000\ cm^3$

Also, $1\ L=1000\ cm^3$

$\therefore 18,000\ cm^3=18\ L$

Now, half of the water is poured out

So, half is left

$\Rightarrow \dfrac{18}{2}=9\ L$

Thus, 9 L of water is left in the container

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2 years ago

Billy the friendly Robot uses 50 N of force to lift a box 2 meters in the air. How much work did Billy perform?

padilas [110]

Answer:

0.04

Step-by-step explanation:

Set it up like this: 50N=2.

you want to leave "N" by itself on one side of the equal sign so divide 50N by 50 and your are left with "N". You also have to divide 50 by 2 on the other side of the equal sign. now you have N=2÷50.

2÷50= 0.04!

8 0

2 years ago