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3 years ago

Multiply: (5x2y – 3xy2)(3xy2 + 5x2y) Please help I need to get this one right!

Mathematics

1 answer:

Aliun [14]3 years ago

6 0

Answer:

(1): "*-5x2y" was replaced by "*(-5x2y)".

(2): "x2" was replaced by "x^2". 1 more similar replacement(s).

STEP

Equation at the end of step 1

(3x • (y2)) • (0 - (5x2 • y))

STEP

Equation at the end of step

3xy2 • -5x2y

STEP

Multiplying exponential expressions :

3.1 x1 multiplied by x2 = x(1 + 2) = x3

Multiplying exponential expressions :

3.2 y2 multiplied by y1 = y(2 + 1) = y3

I believe the answer is ( -3•5x3y3)

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3 years ago

What is the probability of rolling a dice at most 3 times until a 6 occurs

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Answer:

Probablity of getting six in at most three roll= 0.199.

Step-by-step explanation:

Given: Dice rolled at most 3 times untill a 6 occurs.

First, finding the probablity of getting 6 in a dice if rolled once.

Probablity= $\frac{chances\ of\ occurance}{Total\ number\ of\ event}$

We know, dice have six side, therefore, total number of event will be 6.

∴ Probablity of getting six in one roll= $\frac{1}{6}$

As given, Dice is rolled at most 3 times.

Now, finding the probablity of getting 6 in a dice if rolled 3 times.

∴ Probablity of getting six in three roll= $\frac{1}{6}+(\frac{1}{6})^{2} +(\frac{1}{6})^{3}$

⇒ Probablity of getting six in three roll= $\frac{1}{6}+\frac{1}{36} +\frac{1}{216}$

Taking LCD 216

⇒Probablity of getting six in three roll= $\frac{1\times 36+ 6\times 1+1}{216}$

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4 years ago

The circumference of a circle is 13π ft. What is the area, in square feet? Express your answer in terms of π.

Ksenya-84 [330]

Answer:

$\frac{169}{4} \pi$ square feet

Step-by-step explanation:

Circumference = 2πr

13π = 2πr

$\frac{13}{2}$ =r

Area = πr²

π × $\frac{13}{2}$ ² =

$\frac{169}{4}$ π square feet

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3 years ago