1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Yakvenalex [24]
2 years ago
10

Can anyone pls tell me when do we cross multiply and when do we multiply 10 * 75 im really confused

Mathematics
1 answer:
Westkost [7]2 years ago
4 0

You don't multiply liters of gasoline by distance.

They are<u> directly proportional </u>- the more gasoline you have the longer is the dictance you can go.

So it's <u>cross multiply</u>.

Another examlpe:

you are paid by hour for your work. The more hours you have worked, the more you are paid:

hours      payment

2 h            $36

5 h             x    

x=\dfrac{5\cdot36}2=90

You would multiply 10•70 if they were inversely poportional values

For example:

1. speed and time of ride by given distance {the greater the speed the less time you need for a ride}

speed          time

10 m/s          75 s

 8 m/s           x

x=\dfrac{10\cdot75}{8}=93.75\,s

2. price and kolos of apples - the higher the pice the less of kilos you can buy by given cash

price          kilos of apples

$2                8

$4                x

x=\dfrac{2\cdot8}{4}=4\,kg

You might be interested in
Araceli is trying to decide between three job offers. She created the table below to compare the offers.
inna [77]

Answer:

Difference= $11,280

Step-by-step explanation:

Giving the following information:

Manager at Shop & Save Grocers= Hourly wages $16.50 per hour  

Assistant Manager at Unbelievable Toys= Monthly wages $3,800

Cashier at 7-12 Convenience Store= Yearly wages $43,000

<u>First, we need to calculate the yearly wages, and then compare the results:</u>

Shop & Save Grocers= (16.5*40)*52= $34,320

Unbelievable Toys= 3,800*12= $45,600

The highest paying job is at Unbelievable Toys.

Difference= 45,600 - 34,320= $11,280

5 0
3 years ago
Write the equation of a line that has a slope of 1/2 and passes through (6, -4). Write your answer in slope-intercept form. PLEA
Tems11 [23]

Answer:

y = 1/2x - 7

Step-by-step explanation:

y = 1/2x + b

-4 = 1/2(6) + b

-4 = 3 + b

-7 = b

8 0
2 years ago
What is the value of x?
blsea [12.9K]
Since these are supplementary angles  (two angles which sum to 180°) we can say:

4x+x=180  combine like terms on left side

5x=180  divide both sides by 5

x=36°
3 0
3 years ago
Bert and Ernie are missing each other and their friend Big Bird They want to meet at Big Bird's nest which is halfway from their
algol [13]

Answer:

The distance between Bert and Ernie's apartments from Big Bird's nest

is 21 miles

Step-by-step explanation:

* Lets change the story problem to an equation to solve the problem

- The information i the story problem is

# The Big Bird's nest is halfway from there apartments

# The distance between Bert's apartment and Big Bird's nest is (5x + 4)

# The distance between Ernie's apartment and Big Bird's nest is (15x - 30)

* Now lets solve

∵ The Big Bird's nest is halfway from there apartments

∴ The distance between Bert's apartment and Big Bird's nest = The

   distance between Ernie's apartment and Big Bird's nest

∴ 5x + 4 = 15x - 30

- Collect the variable terms in one side and the numerical terms

 in th other side

∴ 15x - 5x = 30 + 4 ⇒ add

∴ 10x = 34

∴ x = 34 ÷ 10 = 3.4

* Now lets find the distance between Bert and Ernie's apartments

from the Big Bird's nest

- We can use any relation to find the distance

∵ The distance = 5x + 4

∵ x = 3.4

∴ The distance = 5(3.4) + 4 = 17 + 4 = 21 miles

You can check the answer by using second equation

∵ The distance = 15x - 30

∵ x = 3.4

∴ The distance = 15(3.4) - 30 = 51 - 30 = 21 miles

4 0
3 years ago
(01.02 LC)Simplify negative 3 and 1 over 9 − negative 8 and 1 over 3.
blsea [12.9K]

As we are given with

-3\frac{1}{9}-(-8\frac{1}{3})\\\\

we are supposed to simplify this expression. which can be done as below

\\=-3\frac{1}{9}+8\frac{1}{3}\\\\=\frac{-28}{9}+\frac{25}{3}\\\\=\frac{-28+75}{9}\\\\=-\frac{47}{9}\\

=5\frac{2}{9}

6 0
3 years ago
Other questions:
  • Which relationship would most likely be casual? Select two options
    12·1 answer
  • A line has a slope of 1/4 and passes through the point (4,8). Write the equation of the line in slope intercept form.​
    14·1 answer
  • Sue Stitch buys a sewing machine. The price, including tax, is $575.00. She finances the sewing machine over 24 months after mak
    14·2 answers
  • The sum of the ages of the father and his son is 42 years. The product of their ages is 185. Find the age of the father and the
    13·1 answer
  • Find the sum of the following two numbers: 749*96 =
    7·1 answer
  • What is 17kg into grams
    7·1 answer
  • What letter on the map represents the Coral Sea?
    5·2 answers
  • PLEASE HELP ME IT HAS BEEN A VERY ROUGH MORNING THANK YOU!
    12·1 answer
  • Select the correct answer. What is the solution to the equation?<br> *image below*
    11·1 answer
  • Solve for brainliest please
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!