MATHEMATICS MIDDLE SCHOOL

Of the students in your class, 12% are left-handed. What fraction of the students are left-handed? Are there more right-handed or left-handed students? Explain. Write your answers in simplest form.I need to know how many people are in what catergory please

Answers

Answer 1

Answer:

Fraction of students left-handed: $(3)/(25)$

There are more right-handed students

Step-by-step explanation:

To solve the problem, we call:

$p(L)$ the fraction of students in the class that are left-handed

$p(R)$ the fraction of students in the class that are right-handed

We know that:

$p(L) = 12\%$ is the fraction of students which are left-handed

we can convert this value into fractional form dividing by 100:

$p(L)=(12)/(100)$

Simplifying by 4,

$p(L)=(3)/(25)$

We also know that

$p(L)+p(R)=1$ , because the fraction of students that are either left or right-handed must be 100%

Therefore, the fraction of students that are right-handed is

$p(R)=1-p(L)=1-(3)/(25)=(22)/(25)$

Therefore, there are more right-handed than left-handed students.

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Mrs. Silvia orders 5 pizzas for every 20 students working on the campus clean - up.how many pizzas should she order if 36 students participate?how many pizzas should she order if 48 students participate.

How many degrees in a triangle

Answers

a triangle equals 180 degrees

A triangle equals 180 degrees

A new shopping mall records 120 total shoppers on their first day of business. Each day after that, thenumber of shoppers is 10% more than the number of shoppers the day before.

What is the total number of shoppers that visited the mall in the first 7 days?

Round your final answer to the nearest integer.

Answers

$\boldsymbol{\mathbf{Answer}}$

$\boldsymbol{\mathbf{213\,shoppers\, will\, visit\,on \, first\, seventh\, day}}$

$\boldsymbol{\mathbf{Step-by-step explanation}}$

Let, No of shoppers on first day = a

No of shoppers on second day = b

Similarly till seventh day,

Therfore shoppers on seventh day=

a + b + c + d + e + f + g

As mentioned ,number of shoppers is 10% more than the number of shoppers the day before. i.e we can understand that a to g all are 1.1 times bigger than the previous letter.

That means all are in geometric series.

We know the formula for sum of geometric series is,

= $\boldsymbol{\mathbf{\sum {a}*{r^((n-1))}}}$

$\boldsymbol{\mathbf{a \, is\, first\, value}}$

$\boldsymbol{\mathbf{r \, is\, multiplication\, factor\, value}}$

$\boldsymbol{\mathbf{n \, is\, no\, items\, in\, series}}$

That is,

a = 120

r = 1.1

n = 7

= $\sum {120}*{1.1^((7-1))}$

= ${120}*{1.7715}$

= 212.58

Approximately

$\boldsymbol{\mathbf{=\, 213 \,shoppers \,will\, be \,there\, on \,seventh \,day.}}$

Help show the work for
5.2 divide by 0.13

Answers

The value of (5.2/0.13) is 40 obtained by removing the decimals.

What are some alternative names for arithmetic operations?

Addition is also known as the sum, subtraction is also known as the difference, multiplication is also known as the product, and division is also known as the factor.

Given, 5.2 is divided by 0.13, which is (5.2/0.13).

Now we can multiply both the numerator and the denominator by 100.

∴ (5.2/0.13)×(100/100).

= 520/13.

= 40.

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Answer:

Step-by-step explanation:

0.13 ⟌5.2 (We can move 0.13 over two spots)

13⟌520 (We move the decimal two spots because of previous)

We have

₄ ₀

13⟌520

- 52

______

0 0

- 0

______

So 40 is our final answer.

Find the square root of 156.25 by division method

Answers

Hello,

I don't know the divison method but is it these one?

156.25= 625/4=(25/2)²

√156.25= 12.5

What 3/8 divided by 48

Answers

Hi, the answer is 1/128
Because you KCF
Keep the first fraction or number
Change division sign for multiplication
Flip the last fraction or number

okay so this should help there is a little song i was taught. "when you are dividing i really don't know why just write the first change the sign flip and multiply."
so you should do 3/8 divided by 48/1 but since what the song says you would do 3/8 times 1/48

so then you cross multiply and get 144=8 so im pretty sure the answer would be 136

i really hope thats the right answer

anna is in a cave 40 feet below the cave entrance. She descends 13 feet, hen ascends 18 feet. Find her new position relative to the cave entrance

Answers

Answer:

35 below the cave entrance.

Step-by-step explanation:

Let the cave entrance be the level from which the positions of Anna will be covered.

Anna is 40 feet below the cave entrance.

That means her position will be considered as (-40) feet.

Then she descends 13 feet then the position of Anna will be = -40 - 13 = -53 feet

Further she ascends 18 feet so her position will be = -53 + 18 = -35 feet

Therefore, the new position of Anna is 35 below the cave entrance.

-40-13=-53
-53+18=-35
35 feet below the cave entrance

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