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3 years ago

12

Look at this equation y=7x+1/3x-6 if 3x=15, then what is the value of y?

2 answers:

bearhunter [10]3 years ago

6 0

Answer:

4

Step-by-step explanation:

7(5) +1 = 36

3(5) -6 = 9

36/9=4

x=5

y=4

Anarel [89]3 years ago

4 0

Answer:

y=36/9 or y=4

Step-by-step explanation:

3x=15: x=5

y=7(5)+1/3(5)-6

y=36/15-6

y=4

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The radius of a circle measures 15 feet. what is the circumference?

harina [27]

The circumference of this circle is c=94.25ft

7 0

3 years ago

Given the following sequence, find the 23rd term: 10.5, 11, 11.5, 12, 12.5, . . .

4vir4ik [10]

10.5, 11, 11.5, 12, 12.5...this is an arithmetic sequence with a common difference of 0.5

an = a1 + (n - 1) * d
n = term to find = 23
a1 = first term = 10.5
d = common difference = 0.5

sub and solve

a(23) = 10.5 + (23 - 1) * 0.5
a(23) = 10.5 + 22 * 0.5
a(23) = 10.5 + 11
a(23) = 21.5 <===

6 0

3 years ago

A group of 7 students was asked, "How many hours did you watch television last week?" Here are their responses. 17, 19, 5, 17, 2

Olenka [21]

Answer:

≈ 14.3 hours

Step-by-step explanation:

The mean is calculated as

mean = $\frac{sum}{count}$ = $\frac{17+19+5+17+20+6+16}{7}$ = $\frac{100}{7}$ ≈ 14.3 ( to nearest tenth )

4 0

3 years ago

AGHHHH MATH IS EVIL help ma please

VLD [36.1K]

Answer:

{ 6, 9, 16, 18 }

Step-by-step explanation:

To find the range substitute the values of x from the domain into the equation for y, that is

x = - 3 : y = - 3 + 9 = 6

x = 0 : y = 0 + 9 = 9

x = 7 : y = 7 + 9 = 16

x = 9 : y = 9 + 9 = 18

The y values are the range of the relation, that is

y ∈ { 6, 9, 16, 18 }

8 0

3 years ago

he life of light bulbs is distributed normally. The variance of the lifetime is 625 and the mean lifetime of a bulb is 540 hours

almond37 [142]

Using the normal distribution, it is found that there is a 0.877 = 87.7% probability of a bulb lasting for at most 569 hours.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean $\mu$ and standard deviation $\sigma$ is given by:

$Z = \frac{X - \mu}{\sigma}$

The z-score measures how many standard deviations the measure is above or below the mean.

Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given, respectively, by:

$\mu = 540, \sigma = \sqrt{625} = 25$

The probability of a bulb lasting for at most 569 hours is the <u>p-value of Z when X = 569</u>, hence:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{569 - 540}{25}$

Z = 1.16

Z = 1.16 has a p-value of 0.877.

0.877 = 87.7% probability of a bulb lasting for at most 569 hours.

More can be learned about the normal distribution at brainly.com/question/24663213

#SPJ1

8 0

2 years ago