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4 years ago

The ratio of red tiles in a bag is 4:7. if the bag contains 16 red tiles, how many blue tiles does it contain

Mathematics

1 answer:

Sladkaya [172]4 years ago

4 0

4X4=16
So 7x4=28

28 blue

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Find the slope of -5x-8

-BARSIC- [3]

Answer:

-5

Step-by-step explanation:

The equation is in slope intercept form. $y=mx+b$

8 replaces b, so it is the y-intercept.

-5 replaces m, so it is the slope.

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3 years ago

Which of the following are not terms in the series below? Check all that apply.

Vlada [557]

Answer:

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Step-by-step explanation:

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3 years ago

What is the common difference d of the sequence nine -8 -25 -42 -59

ZanzabumX [31]

Answer:

The common difference d in the given sequence is -17

Step-by-step explanation:

We need to find the common difference d of the following sequence 9 -8 -25 -42 -59

We have a₁ = 9

and a₂ = -8

The formula used is: $a_n=a_1+(n-1)d$

By putting values we can find the value of d

We have n=2, a₂ = -8, a₁ = 9 and we need to find d

$a_n=a_1+(n-1)d\\a_2=a_1+(2-1)d\\-8=9+d\\d=-8-9\\d=-17$

So, the common difference d in the given sequence is -17

6 0

3 years ago

I really need this answer, its a quiz

Korvikt [17]

Step-by-step explanation:

hahahahahaha I finished math I don't want to see that

4 0

3 years ago

The mean number of words per minute (WPM) typed by a speed typist is 149149 with a standard deviation of 1414 WPM. What is the p

Semmy [17]

Answer:

The probability is $P(\= X > x ) = 0.78814$

Step-by-step explanation:

From the question we are given that

The population mean is $\mu = 149$

The standard deviation is $\sigma = 14$

The random number $x = 147.81$

The sample size is $n = 88$

The probability that the sample mean would be greater than $P(\= X > x ) = P( \frac{ \= x - \mu }{\sigma_{\= x} } > \frac{ x - \mu }{\sigma_{\= x} } )$

Generally the z- score of this normal distribution is mathematically represented as

$Z = \frac{ \= x - \mu }{\sigma_{\= x} }$

Now

$\sigma_{\= x } = \frac{\sigma }{\sqrt{n} }$

substituting values

$\sigma_{\= x } = \frac{14 }{\sqrt{88} }$

$\sigma_{\= x } = 1.492$

Which implies that

$P(\= X > x ) = P( Z > \frac{ 147.81 - 149 }{ 1.492} )$

$P(\= X > x ) = P( Z > -0.80 )$

Now from the z-table the probability is found to be

$P(\= X > x ) = 0.78814$

5 0

3 years ago