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3 years ago

The number of girls in cobbs class is 2 less than 3 times the number of boys. She has 26 students in her class how many are boys

Mathematics

1 answer:

Natalka [10]3 years ago

3 0

Answer:

7 are boys

Step-by-step explanation:

Make a system of equations where g is for girls and b is for boys.

b+g=26

g=3b-2

Substitute "3b-2" in for "g" in the first equation.

b+(3b-2)=26

Rewrite without the parentheses because it's addition and not multiplication.

b+3b-2=26

Combine like terms.

4b-2=26

Add 2 to both sides.

4b=28

Divide by the coefficient of the variable to get it alone.

b=7

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A total of 507

expeople1 [14]

Answer:

507-57 = 450 adult tickets

hope this helps :) plz brainliest if helps

Step-by-step explanation:

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3 years ago

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Which term best describes the expression 2x + 2dy−3?

Margarita [4]

Answer:

the term is separated by minus (-) and plus (+) .

therefore this term is trinomial.

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3 years ago

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Solve by the elimination method

Usimov [2.4K]

There is one solution. The solution of the system is (9,-5)

Option A is correct.

Step-by-step explanation:

We need to solve the system of equations by elimination method

$6x= 64+2y\\2x= -7-5y$

Rearranging the equations:

$6x-2y=64\,\,\,eq(1)\\2x+5y=-7\,\,\,eq(2)$

Eliminating y to find value of x:

Multiply eq(1) by 5 and eq(2) by 2 and add both equations:

$30x-10y=320\,\,\,\\4x+10y=-14\\--------\\34x=306\\x=\frac{306}{34}\\ x=9$

So, value of x= 9

Eliminating x to find value of y:

Multiply eq(1) by 2 and eq(2) by 6 and subtract both equations:

$12x-4y=128\\12x+30y=-42\\-\,\,\,\,-\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,+\\---------\\-34y=170\\y=\frac{170}{-34}\\ y=-5$

So, value of y = -5

There is one solution. The solution of the system is (9,-5)

Option A is correct.

Keywords: Solving system of equations

Learn more about Solving system of equations at:

#learnwithBrainly

5 0

3 years ago

PLEASE HELP ITS MATH THANK YOUUUU

viva [34]

Answer:

44 millimeters

Step-by-step explanation:

Because 99 meters divided by 9 = 11.

So, I multiplied 4 x 11 to get 44 millimeters.

Mark as brainliest PLZ. Thank you! It will help a lot!

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2 years ago

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Solve.<br><br> 3 = –(–y + 6)

o-na [289]

3=−(−y+6)

Simplify:

3=−(−y+6)

3=y+−6(Distribute)

3=y−6

Flip the equation.

y−6=3

Add 6 to both sides.

y−6+6=3+6

y=9

6 0

2 years ago