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2 years ago

Helpppppppppppppppppppppppppppppp

Mathematics

2 answers:

aev [14]2 years ago

8 0

Answer:

Step-by-step explanation:

because the new number is changing to a new and all old is ready.

Alexxx [7]2 years ago

7 0

The answer would be c

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3 x [9 – (4 + 2) = 2]

Pani-rosa [81]

Answer:

<h2>False</h2>

Hope this helps

hzbzbzbx

4 0

3 years ago

A brother and a sister are in the same math class. there are 8 boys and 20 girls in the class. one boy and one girl are randomly

Pavlova-9 [17]

<h2>the answer i thinkk is 2/20 because since there ae 20 children, then the brother and sister each have a 1% chance, hope this helped!</h2>

7 0

3 years ago

The ceiling of Katie’s living room is a square that is 15 ft long on each side. To decorate for a party, she plans to hang crepe

egoroff_w [7]

Answer:

<u><em>6</em></u> rolls because the total perimeter is 102 ft and five rolls is only 100 feet. So she needs <em><u>6</u></em> rolls.

Step-by-step explanation:

to find perimeter, add up all the side lengths.

so 15*4 (it's easier than 15+15+15...)

60 ft.

now we have to use Pythagorean's Theorum to find corner to corner.

so $a^2+b^2=c^2$

we have a and b

$15^2+15^2=c^2$

do the math...

225+225= 450

square root of 450=

21.213

double that because it's used twice (corner to corner and corner to corner)

42.426

now add it all up

42.426 + 60 = 102.426

we can round

102

20*5 = 100

so she needs 6

MY ORIGINAL ERROR WAS 5, BUT 5 TIMES 20 IS ONLY 80, SO THEREFORE 6 IS REQUIRED SO THERE IS ENOUGH TO COVER 102.

6 0

3 years ago

I don’t understand how to do this at all.

avanturin [10]

Answer:

Step-by-step explanation:

(m+3) (m-1)

We need to FOIL

first m*m = m^2

outer -1*m = -m

inner = 3m

last 3*-1 = -3

Add these together

m^2 -m +3m -3

m^2 +2m -3

3 0

3 years ago

Can someone Plzzz help me out???

Vitek1552 [10]

Hello from MrBillDoesMath!

Answer: 3

Discussion:

The perimeter of a polygon is the sum of the side lengths.

Perimeter of top polygon is (x+2) + 2x + (x + 2) + (4x + 1) = 8x + 5

Perimeter of bottom triangle is 4x + 2x + (3x+2 ) = 9x + 2

The perimeters are the same when

8x + 5 = 9x + 2

Subtract 8x from both sides:

5 = (9x - 8x) + 2 or

5 = x + 2

Subtract 2 from each side to get x = 3:

5 -2 = 3 = x

The perimeter of either figure is 29

Regards, MrB

6 0

2 years ago