4 years ago

A bag contains green marbles and blue marbles,

Mathematics

1 answer:

dexar [7]4 years ago

8 0

There are 13 green marbles in the bag.

Step-by-step explanation:

Total marbles = 18

Let,

Green marbles = x

Blue marbles = y

According to given statement;

The number of green marbles is 2 less than 3 times the number of blue marbles.

x = 3y-2 Eqn 1

x+y=18 Eqn 2

Putting value of x from Eqn 1 in Eqn 2;

$(3y-2)+y=18\\3y-2+y=18\\4y=18+2\\4y=20$

Dividing both sides by 4

$\frac{4y}{4}=\frac{20}{4}\\y=5$

Putting y=5 in Eqn 1

$x=3(5)-2\\x=15-2\\x=13$

There are 13 green marbles in the bag.

Keywords: linear equation, substitution method

Learn more about linear equations at:

#LearnwithBrainly

You might be interested in

Solve the following equation algebraically X^2=36

lara [203]

Answer:

I think the answer is C.

6 0

3 years ago

Suppose you are choosing between checking account A, which charges a $7.50 monthly fee, $1 per check, and $2 per ATM visit; and

Kisachek [45]

I'd go with Checking account B because its cheaper .

8 0

3 years ago

What is an angle?

Tems11 [23]

Answer:

Two rays conjoined with a vertex

In Geometry, an angle is when two rays intersect/conjoin with a vertex. The answer is Two rays conjoined with a vertex. Hope it helps!

3 0

3 years ago

Read 2 more answers

I will mark as brainliest, thank you

ch4aika [34]

It would be 3/25 who are left handed and 22/25 who are right handed.

6 0

3 years ago

Read 2 more answers

Emma's final grade in her math class is the average (mean) of her 5 chapter tests she took throughout the year. If she received

NikAS [45]

Answer:

Step-by-step explanation:

The mean (or average) of a set of numbers can be found with the following formula:

$Mean = \frac{A_{1} + A_{2} + ... + A_{N}}{N}$

For this problem, we have five numbers, so we add them together and divide by 5:

$Mean = \frac{92 + 85 + 78 + 97 + 88}{5}$

$Mean = \frac{440}{5}$

$Mean = 88$

8 0

3 years ago

Read 2 more answers