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sergiy2304 [10]
3 years ago
12

A worker is installing blue and white square tiles in a kitchen. Blue tiles have different lengths than white tiles. A row of 8

blue tiles and 16 white tiles has a length of 39 inches. A row of 40 blue tiles and 8 white tiles has a length of 42 inches. Write a system of equations that represents in inches the relationship between the length of a blue tile and
Mathematics
1 answer:
ipn [44]3 years ago
4 0

Answer:

8x + 16y = 39 and

40x + 8y = 42

Step-by-step explanation:

Let the length of the blue tiles is b inches and that of the white tiles is w inches.

So, given that a row of 8 blue tiles and 16 white tiles has a length of 39 inches and a row of 40 blue tiles and 8 white tiles has a length of 42 inches.

Therefore, we can write the system of linear equations that represents the relationship between the length if a blue tile and a white tile in inches as

8x + 16y = 39 and

40x + 8y = 42 (Answer)

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Numbers get 10x bigger or smaller when you move one place to the right on the decimal scale. true or false
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Answer:

It is true!!!'djjfdjidjdneidid

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3 years ago
A random sample of 70 printers discovered that 25 of them were being used in small businesses. find the 95% limit for the popula
kvasek [131]

Answer:

The sample proportion of printers used in small business is:

\hat{p}=\frac{25}{70}=0.3571

The 95% confidence interval for the population proportion of printers that are used in small businesses is:

\hat{p} \pm z_{\frac{0.05}{2}} \sqrt{\frac{\hat{p}(1-\hat{p})}{n} }

Where:

z_{\frac{0.05}{2}}=1.96 is the critical value at 0.05 significance level

\therefore 0.3571 \pm 1.96 \sqrt{\frac{0.3571(1-0.3571)}{70} }

         0.3571 \pm 0.1122

         \left ( 0.3571 - 0.1122, 0.3571 + 0.1122 \right)

         \left(0.245,0.469 \right)

Therefore, the 95% confidence interval for the population proportion of printers that are used in small businesses is (0.245 , 0.469)



7 0
3 years ago
For which pairs of functions is (f•g)(x)=x of functions is (f•g)(x)=x
Sonbull [250]

Answer:

Option A

Step-by-step explanation:

The complete question is shown in the attachment.

Note that: (f\cdot g)(x)=f(x)\cdot g(x)

We need to multiply all the functions to see which of them satisfy the given criteria.

Option A

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Option B

\frac{2}{x} \cdot \frac{2}{c} =\frac{4}{cx}

Option C

\frac{x-2}{3} \cdot 2-3x =\frac{-3x^2+8x-4}{3}

Option D

\frac{1}{2x-2} \cdot \frac{1}{2x+2} =\frac{1}{4(x^2-1)}

The correct choice is A

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How do we know that we Enlarged by 2?
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Answer:

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Step-by-step explanation:

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"the advrage a of 2 numbers c and d is equal to half the sum of c and d " this whole qustion confuses the I am basically suppose
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Answer:

\frac{c + d}{2}

Step-by-step explanation:

this is the equation used to find the average of two numbers.

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