3 years ago

Solving 3x3 Equations

Mathematics

2 answers:

Rudiy273 years ago

8 0

Step-by-step explanation:

the answer is simple math 9

Sedaia [141]3 years ago

6 0

Answer:

Step-by-step explanation:

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in rectangle ABCD, BD and AC are diagonals and intersect at E. If BD = 84 units and AE = 6y, what is the value of y

goldfiish [28.3K]

Answer:

y = 7

Step-by-step explanation:

The diagonals of a rectangle are congruent and bisect each other, then

AC = BD , that is

AE + EC = BD [ AE = EC = 6y ]

6y + 6y = 84

12y = 84 ( divide both sides by 12 )

y = 7

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1 year ago

A theater has 418 seats put in rows of 19 seats each. how many rows are in the theater

GarryVolchara [31]

Answer:

Step-by-step explanation:

418 divided by 19 is 22.

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2 years ago

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Carlos had $65.00 in his checking account. By mistake he wrote out a check for $82.00. By how much is his checking account overd

mylen [45]

$65.00 - $82.00 = -$17
His account is overdrawn by $17.

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2 years ago

Which of these is a simplified form of the equation 8y + 4 = 6 + 2y + 1y?

larisa86 [58]

The first one would be the right one!

you just take all the y one side and the numbers on one side
so 8y+4= 6+3y

now 8y-3y= 6-4

therefore 5y = 2

!!

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3 years ago

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NO SCAM. PLEASE SHOW WORK. WILL GIVE BRAINLY TO CORRECT ANSWER.

sergeinik [125]

Answer:

$140$

Step-by-step explanation:

A regular polygon is a shape with equal sides and angles. Because of this, we can write the following equation to set two sides equal to each other:

$3a+b+3=2a+2b+6$

Solving, we will get a in terms of b:

$3a=2a+b+3,\\a=b+3$

Now we can substitute a for (b+3) into our equation:

$5a-2b+1=2a+2b+6,\\5(b+3)-2b+1=2(b+3)+2b+6,\\3b+16=4b+12,\\-b=-4,\\b=\boxed{4}$

Therefore, the length of each side of this polygon is $5(4+3)-2(4)+1=28$ .

Since the perimeter of the polygon consists of all five sides, the perimeter is:

$p=28\cdot 5 =\boxed{140}$

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2 years ago

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