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bagirrra123 [75]

3 years ago

10

You want to buy a new cell phone. The sale price is $149. The sign says that this is $35 less than the original cost. What is th

e original cost of the phone?

1 answer:

Sphinxa [80]3 years ago

3 0

What you need to do is add the sale price to the $35 dollars and that will give you the original coat of the phone

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A company has two manufacturing plants with daily production levels of 5x + 11 items and 2x - 3 items, respectively. The first p

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Answer:

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Step-by-step explanation:

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Second plant produces 2x - 3 items

First plant production - second plant production = 5x + 11 - (2x - 3)

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The table displays the frequency of scores for a calculus class on an exam. The mean of the exam scores is 3.5. Score 1 2 3 4 5

vladimir1956 [14]

Answer:

f=11

Mode=4

Median=4

Explanation:

We are given that

a.Mean of the exam score, $\bar x$ =3.5

Score(x) frequency C.F

1 1 1

2 3 4

3 f 15(4+f=4+11)

4 13 28

5 4 32

$\sum f_i=1+3+f+13+4=21+f$

$\sum f_ix_i=1(1)+2(3)+3(f)+4(13)+5(4)=1+6+3f+52+20=79+3f$

$(\bar x)=\frac{\sum f_ix_i}{\sum f_i}$

Using the formula

$3.5=\frac{79+3f}{21+f}$

$73.5+3.5f=79+3f$

$3.5f-3f=79-73.5$

$0.5f=5.5$

$f=\frac{5.5}{0.5}=11$

b.Mode:The number which is repeat most times .

4 repeat most times

Hence, mode of all exam scores=4

N=32

N is even

$Median=\frac{(\frac{n}{2})^{th}+(\frac{n}{2}+1)^{th}}{2}$

Median= $\frac{16th+17th}{2}=\frac{4+4}{2}=\frac{8}{2}=4$

7 0

3 years ago