Analyze Manda’s work. Is she correct? If not, what was her mistake?

Mathematics

2 answers:

ELEN [110]3 years ago

7 0

Answer: 3. 100x= 27

Step-by-step explanation: Yes, she is correct.

In step 2, she needed to multiply both sides by 10.

In step 3, she did not subtract one x from the left side.

In step 4, she did not simplify her fraction.

forsale [732]3 years ago

4 0

Answer:

Step-by-step explanation: step 3 is the answer

You might be interested in

Flashback! Do you remember what these numbers tell you? The 10 means it will pay only $10,000 maximum for injury to any one pers

iogann1982 [59]

Answer:

10 -- $10k to any one person
20 -- $20k to all persons, total
5 -- $5k for property damage

all are maximum values

Step-by-step explanation:

Insurance contracts specify maximum payments, not minimum payments. The numbers mean ...

The 10 means it will pay only $10,000 maximum for injury to any one person in an accident.

The 20 means it will pay a maximum of $20,000 total to people injured in one accident.

The 5 means that it will pay a maximum of $5,000 in property damage for one accident.

6 0

2 years ago

Help me find Sample variance and standard deviation

AnnZ [28]

First, find the mean. You'll need it to compute the variance.

$\bar x=\displaystyle\frac15\sum_{i=1}^5x_i=\dfrac{21+10+6+7+11}5=11$

The variance of the sample is then computed with the formula

$s^2=\displaystyle\dfrac1{5-1}\sum_{i=1}^5(\bar x-x_i)^2=\dfrac{(21-11)^2+\cdots+(11-11)^2}4=\dfrac{71}2=35.5$

The standard deviation is the square root of the variance, so

$s=\sqrt{35.5}\approx5.958$