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3 years ago

Identify the equation in the following table

Mathematics

1 answer:

yan [13]3 years ago

6 0

The answer is c y=3x-1 if you just plug in the numbers you can see if it is equal

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In 2009, the American Time Use Survey found that the average American spends 2.8 hours a day watching TV. Suppose the standard d

Anit [1.1K]

Answer:

4.72 hours/day

Step-by-step explanation:

Mean time spent watching TV (μ) = 2.8 hours a day

Standard deviation (σ) = 1.5 hours a day

The 90th percentile (upper 10%) of a normal distribution has an equivalent z-score of roughly z = 1.282. The minimum time spent watching TV, X, at the 90th percentile is:

$z=\frac{X-\mu}{\sigma} \\1.282=\frac{X-2.8}{1.5}\\ X=4.72\ hours/day$

On a typical day, you must watch at least 4.72 hours of TV to be in the upper 10%.

8 0

3 years ago

14 V = bdt. Solve the formula for de

snow_tiger [21]

Answer:

$d=\dfrac{V}{bt}$

Step-by-step explanation:

It is given that,

V = bdt i.e. V is equal to the product of b, d and t

We need to find the formula for d.

Dividing both sides of the given expression by bt

So,

$\dfrac{V}{bt}=\dfrac{bdt}{bt}\\\\d=\dfrac{V}{bt},\ \text{bt in both denominator and numerator cancel out}$

Hence, $d=\dfrac{V}{bt}$ is the value of d.

5 0

3 years ago

Sam wants to know how long it will take to fill his baby pool that holds 24 gallons. after 1 minute, there are 2 gallons of wate

saul85 [17]

B 12 because you divide 24/2=12

3 0

3 years ago

Read 2 more answers

Each day the 29 people in Ms.Gills band class play music for 34 minutes.what would be the best estimate for the amount of music

poizon [28]

234 bc you they play 34 mins in one day and just times 34 by 7 and it will get ur answer.

6 0

3 years ago

Read 2 more answers

The two men measure the angle of elevation to the highest point on the rock to be 22.6°. They

IgorC [24]

Answer:

15 m

Step-by-step explanation:

Refer to attached picture

The height = h
Angles of elevation 22.6° and 38.3°
Closer distance = d

Use tangent to solve

tan 22.6° = h/(d + 17) ⇒ h = (d + 17) tan 22.6° ⇒ h = 0.42(d + 17)
tan 38.3° = h/d ⇒ h = d tan 38.3° ⇒ h = 0.79d

Compare the equations above and find the value of d:

0.42(d + 17) = 0.79d
0.42d + 7.14 = 0.79d
0.79d - 0.42d = 7.14
0.37 d = 7.14
d = 7.14/0.37
d = 19.3 m

Now find the value of h:

h = 0.79d
h = 0.79*19.3
h = 15

Wave Rock is 15 m tall

3 0

2 years ago