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3 years ago

Help please I don't get it

Mathematics

2 answers:

Sonja [21]3 years ago

8 0

A variable is an unknown, so for example Joe has 5 cards but Gordon has 5 times more cards then Joe, our variable is x (whatever letter you want but i)
X=how many cards Gordon has
I hope this helps!

rewona [7]3 years ago

7 0

A variable is a letter that represents unspecified numbers. We use a variable in the same manner as all other numerals.

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Andrew has three times as many pencils as Noah and five pens he has 17 pens and pencils altogether how many pencils does Noah ha

Novay_Z [31]

9514 1404 393

Answer:

Step-by-step explanation:

The distributive property does not appear to be involved in this question.

Let n represent the number of Noah's pencils. Then Andrew's total is ...

3n +5 = 17

3n = 12 . . . . . subtract 5 from both sides

n = 4 . . . . . . divide both sides by 3

Noah has 4 pencils.

7 0

2 years ago

Add and reduce 2/7+ 16/21=

max2010maxim [7]

Answer:

6/7

Step-by-step explanation:

8 0

2 years ago

the number of kilometers a car can drive varies directly with the liters of fuel in the car. this car can travel 476 kilometers

notka56 [123]

For this case we have that the relationship is direct.

Therefore, we have:

$y = k * x$

Where,

y: distance traveled in kilometers

x: number of liters of fuel

k: proportionality constant

We must look for the value of k. For this, we use the following data:

This car can travel 476 kilometers on 17 liters of fuel.

Substituting values we have:

$476 = k * 17$

From here, we clear the value of k:

$k = \frac{476}{17}\\k = 28$

Therefore, the relationship is:

$y = 28x$

For 1428 kilometers we have:

$1428 = 28x$

Clearing the amount of fuel we have:

$x = \frac{1428}{28}\\x = 51$

Answer:

51 liters of fuel are required for the vehicle to travel 1,428 kilometers

3 0

3 years ago

Four subtracted from twice a number is two. what is the number

EastWind [94]

Answer: 3

Step-by-step explanation:

First, we will write a mathematical equation for the phrase given.

-> Let n be "a number"

four subtracted from twice a number is two

four subtracted from twice a number = 2

(twice a number) - 4 = 2

2n - 4 = 2

Now, we will solve this equation by isolating the variable.

2n - 4 = 2

2n = 6

n = 3

Read more about algebraic equations here:

brainly.com/question/27791850

8 0

2 years ago

Eamon wants to buy a new baseball glove that costs $50. he has $14 and earns $6 per hour cleaning yards. How many hours must he

konstantin123 [22]

Answer:

The answer is that he would have to work 6 hours to have enough money to buy the glove.

Step-by-step explanation:

1: Find the amount he needs to earn by subtracting $14 from $50: 50 - 14 = 36. So he needs to earn $36.00.

2: Since you have to find the amount of hours, you can divide $6 from $36 to get the amount of hours he needs to work: 36 / 6 = 6. Eamon only gets $6.00 per hour so he would have to work 6 hours to get the $36.00.

3 0

2 years ago

Read 2 more answers