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3 years ago

A phone company offers two monthly plans. Plan A costs

Mathematics

2 answers:

sergij07 [2.7K]3 years ago

5 0

Hi there!

For plan A it will only take five minutes to amount to $20,50 , because 20 + 5*0,10 = 20,50$

Plan B will need 30 min to cost the same as plan A $20.50, because 16 + 30*015 = 20,50$.

Hope this helps!

Rus_ich [418]3 years ago

3 0

For plan A it will only take five minutes to amount to $20.50

Plan B will need 30 min to cost the same as plan A $20.50

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zheka24 [161]

Step-by-step explanation:

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3 years ago

Calculate the data value that corresponds to each of the following z-scores.

Fynjy0 [20]

Answer:

a) 90.1

b) $35.6

c) 3.0915 hours

Step-by-step explanation:

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

It is given by the following formula:

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

In which $\mu$ is the mean and $\sigma$ is the standard deviaition.

In all three cases, we have to find X

a. Final exam scores: Allison’s z-score = 2.30, μ = 74, σ = 7.

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

$2.30 = \frac{X - 74}{7}$

$X - 74 = 7*2.3$

$X = 90.1$

b. Weekly grocery bill: James’ z-score = –1.45, μ = $53, σ = $12.

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

$-1.45 = \frac{X - 53}{12}$

$X - 53 = -1.45*12$

$X = 35.6$

Mean and standard deviation in dollars, so the answer also in dollars.

c. Daily video game play time: Eric’s z-score = –0.79, μ = 4.00 hours, σ = 1.15 hours.

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

$-0.79 = \frac{X - 4}{1.15}$

$X - 4 = -0.79*1.15$

$X = 3.0915$

Mean and standard deviation in hours, answer in hours.

6 0

3 years ago

Solve.

OleMash [197]

Answer:

x< -1.8

Step-by-step explanation:

-12x+13>35

We leave the variable alone passing the 13 with opposite sign to the other side and subtracting it from 35.

-12x>22

We divide both by the variable, -12x, and it gives x > -1.8. Since the sign of x changed, we flip the sign and the final result is x < -1.8

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3 years ago

Read 2 more answers

Raymond just got done jumping at Super Bounce Trampoline Center. The total cost of his session was \$43.25$43.25dollar sign, 43,

rodikova [14]

Answer:

Raymond was for 29 minutes on the trampoline.

Step-by-step explanation:

We are given the following in the question:

Total cost of session = $43.25

Entrance fee = $7

Cost per minute = $1.25

Let t be the minutes that Raymond was on the trampoline.

Thus, we can write

Total cost =

Entrance fee + cost per mute(minutes that Raymond was on trampoline)

$C(t) = 7 + 1.25t$

Putting the values, we get,

$43.25 = 7 + 1.25(t)\\1.25t = 43.25 - 7\\1.25t = 36.25\\\\t = \dfrac{36.25}{1.25}\\\\t = 29$

Thus, Raymond was for 29 minutes on the trampoline.

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