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Gennadij [26K]
3 years ago
11

A construction company builds a swimming pool with a perimeter of 54 m. The length is 3 m more than the width. Find the dimensio

ns of the swimming pool?
Mathematics
1 answer:
shutvik [7]3 years ago
8 0
2 x(3 + 2 x x ) = 54

2(3 + 2x)
6+4x=54

4x = 54-6
4x = 48
4x/4 = 48/4
x = 12
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How many oz. of a metal containing 40%
RideAnS [48]

Answer:

3 oz

Step-by-step explanation:

Let x represent the number of oz. of the medal with 40% gold:

Set up an equation and solve for x:

0.4x + 7(0.9) = 0.75(x + 7)

0.4x + 6.3 = 0.75x + 5.25

6.3 = 0.35x + 5.25

1.05 = 0.35x

3 = x

So, you will need 3 oz. of the metal with 40% gold

3 0
3 years ago
Mr.Anderson paid $19.18 for a CD cover. This amount includes a tax of 8.5%. What was the cost of the CD cover before tax ?
MrRa [10]
X * 1.085 = 19.18
solve for x

Why is this how you figure it out? well... you have the price of the CD cover and the total is the price of the CD cover with tax. 

Price of the CD cover would be: x * 1 = price of cd cover
Put that tax on there: x * 1.085 = price of cd cover with tax

why .085? move that decimal over two places to the left from the 8.5%
3 0
3 years ago
What is the value of this expression when a = 2 and b = -3?
Serhud [2]

Answer:

7

Step-by-step explanation:

(a^3 - b^3) / 5

Let a=2 and b = -3

Do the exponents inside the parentheses

(2^3 -  (-3)^3) / 5

Then add

(8 - (-27))/5

Subtracting a negative is like adding

(8+27)/5

( 35)/5

7

5 0
4 years ago
The circumference of the Earth is approximately 25,000 miles. Find the diameter of the Earth.
Lady_Fox [76]
C= \pi d 

25000/ \pi
= b
6 0
3 years ago
Read 2 more answers
Not gonna sugar coat it <br> im cheeting...
Neporo4naja [7]

Answer:

The answer is <u><em>-0.44</em></u>.

Hope that helps. x

6 0
3 years ago
Read 2 more answers
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