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3 years ago

A rectangular swimming pool measures 14 feet by 30 feet. The pool is

Mathematics

1 answer:

Zolol [24]3 years ago

4 0

Answer:

The total cost of resurface the path is $\$600$

Step-by-step explanation:

step 1

Find the area of the path

The area of the path is equal to the area of the path plus the swimming pool minus the area of the swimming pool

$A=(14+3+3)(30+3+3)-(14)(30)$

$A=(20)(36)-(14)(30)$

$A=300\ ft^{2}$

step 2

Find the cost of resurface the path

Multiply the area of the path by $2 per square foot

$300*2=\$600$

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Eduardwww [97]

Answer:

1)=38 /// 2)=116 /// 3)=102 /// 4)=41

Step-by-step explanation:

7 0

3 years ago

How to solve this? 0.5x+y=1.5 and 0.8x-0.2y=6

zavuch27 [327]

Step-by-step explanation:

Step 1 : 0.5x + y = 1.5

0.8x - 0.2y =6

Step 2 : y = 1.5 - 0.5x

0.8x - 0.2 ( 1.5 - 0.5x ) = 6

Step 3 : y = 1.5 - 0.5x

0.8x - 0.3 + 0.1x = 6

Step 4 : y = 1.5 - 0.5x

0.9x = 6.3

Step 5 : y = 1.5 - 0.5* 7

x = 7 ( put 7 into the x value above )

Ans: y = -2

x = 7

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8 0

3 years ago

A new analytical method to detect pollutants in water is being tested. This new method of chemical analysis is important because

Andreas93 [3]

Answer:

Step-by-step explanation:

levels of organic pollutants with 99.7% accuracy

levels of volatile solvents with 99.92% accuracy

levels of chlorinated compounds with 89.7% accuracy

samples:

60% contaminated with organic pollutants

27% contaminated with volatile solvents

13% contaminated with traces of chlorinated compounds

a) probability that the test will signal?

P = 0.997*0.6 + 0.9992*0.27 + 0.897*0.13 = 0.5982 + 0.269784 + 0.11661 = 0.984594 = 98.45%

b) If the test signals, the probability that chlorinated compounds are present?

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5 0

3 years ago

Y+5=3/2(x-7) write in y=mx+b form

adelina 88 [10]

Answer:

$y=\displaystyle \frac{3}{2}x-\frac{31}{2}$

Step-by-step explanation:

Hi there!

Slope-intercept form: $y=mx+b$ where m is the slope and b is the y-intercept (the value of y when the line crosses the y-axis)

Notice how y is isolated in slope-intercept form.

$y+5=\displaystyle \frac{3}{2} (x-7)$

To change this into slope-intercept form, isolate y.

Use the distributive property on the parentheses:

$y+5=\displaystyle \frac{3}{2}x-\frac{21}{2}$

Subtract 5 from both sides:

$y=\displaystyle \frac{3}{2}x-\frac{21}{2}-5\\\\y=\displaystyle \frac{3}{2}x-\frac{31}{2}$

I hope this helps!

5 0

3 years ago

Last year, a local car dealership sold 200 more cars with automatic transmission than with standard transmission. During that ye

MatroZZZ [7]

Answer:

The total number of automatic transmission car dealership sell = 728

Step-by-step explanation:

Given as :

Let the total number of standard transmission car = S

And the total number of automatic transmission car = 200 + S

The percentage of blue standard car = 15%

The percentage of blue automatic car = 10%

Total number of blue car sold = 152

∴ 15% of S + 10% of ( 200 + S ) = 152

Or, 15 S + 10 × ( 200 + S ) = 152 × 100

Or, 25 S = 15200 - 2000

Or, 2 5 S = 13200

∴ S = $\frac{13200}{25}$

So, S = 528

I.e The total number of standard transmission car = S = 528

And the total number of automatic transmission car = 200 + 528 = 728

Hence The total number of automatic transmission car dealership sell = 728 Answer

6 0

3 years ago