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Mashutka [201]
3 years ago
8

Jasmines cell phone company charges $35 an month for phone service plus 0.50 for each text message.How many twxt messages does J

asmine swnd in a month if her bill was $52?​
Mathematics
2 answers:
AlekseyPX3 years ago
8 0
52-35=17
17/0.50= 34
She sends 34 messages in a month
wolverine [178]3 years ago
7 0
1st we would have to subtract $35 from $52 because we know $35 is all ready being paid. We get $17. Then we have to multiply $0.50 by a number we think could be the possible number to get $17. 34×$0.50=17. So your answer would be 34 text. Hope this helps.
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In math what is imaginary I stand for
ahrayia [7]
Imaginary number is one that when squared gives a negative result. ... With imaginary numbers, when you square them, the answer is negative. They are written like a real number, but with the letter i after them, like this: 23iThe letter i means it is an imaginary number.
4 0
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In the formula C= prn, p stands for
umka21 [38]

Answer:

A

Step-by-step explanation:

3 0
3 years ago
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Can some one explain in an easy way pls
Helga [31]
What needs to be done first is to add up females and males that have passed.

42 + 14 = 56

so out of 56 students who passed 42 females passed 42/56 = 3/4 = 0.75

out of 56 students who passed, 14 males passed which turns into 14/56 = 1/4 = 0.25

check work; 0.75 + 0.25 = 1.00

NOW WE ARE DOING FAILS.

15 + 5 = 20

so out of 20 students who failed, 15 females failed so it turns into 15/20 = 3/4 = 0.75

out of 20 students who failed, 5 males failed. 5/20 = 1/4 = 0.25

check work; 0.75 + 0.25 = 1.00

i hope this helped! :)

7 0
2 years ago
"A cable TV company wants to estimate the percentage of cable boxes in use during an evening hour. An approximation is 20 percen
Marizza181 [45]

Answer:

The company should take a sample of 148 boxes.

Step-by-step explanation:

Hello!

The cable TV company whats to know what sample size to take to estimate the proportion/percentage of cable boxes in use during an evening hour.

They estimated a "pilot" proportion of p'=0.20

And using a 90% confidence level the CI should have a margin of error of 2% (0.02).

The CI for the population proportion is made using an approximation of the standard normal distribution, and its structure is "point estimation" ± "margin of error"

[p' ± Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }]

Where

p' is the sample proportion/point estimator of the population proportion

Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} } is the margin of error (d) of the confidence interval.

Z_{1-\alpha /2} = Z_{1-0.05} = Z_{0.95}= 1.648

So

d= Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }

d *Z_{1-\alpha /2}= \sqrt{\frac{p'(1-p')}{n} }

(d*Z_{1-\alpha /2})^2= \frac{p'(1-p')}{n}

n*(d*Z_{1-\alpha /2})^2= p'(1-p')

n= \frac{p'(1-p')}{(d*Z_{1-\alpha /2})^2}

n= \frac{0.2(1-0.2)}{(0.02*1.648)^2}

n= 147.28 ≅ 148 boxes.

I hope it helps!

3 0
3 years ago
Solve for the value of z: 14/5 = z/24<br> ____?
natka813 [3]

Answer:

Step-by-step explanation:

Cross multiplying

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Divide by 5

z = 336/5

Or mixed fraction z= 67(1/5)

Decimal z= 67.2

3 0
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