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3 years ago

Subtract these polynomials. (3x2 + 2x+4) - (x2+2x+ 1) = What’s the answer

Mathematics

2 answers:

katen-ka-za [31]3 years ago

6 0

Answer:

3x+5-x2

Step-by-step explanation:

(3x2+2x+4)-(x2+2x+1)

3x+2+2x+4-x2-2x-1

3x+2x-2x+2+4-1-x2

3x+5-x2

zimovet [89]3 years ago

4 0

Collect like terms once done expanding... the answer is 2x^2 + 3

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William is 3 years older than Charmaine.The sum of 3 times charmaines age and 2 times Williams age is 76.How old are William and

astra-53 [7]

Charmaine= x
William=x+3
3 times Charmaine = 3x
2times William = 2x+6
5x+6=76
5x=76-6
5x=70
X=14
Charmaine is 14
William is 3 years older so is 17

Check:
17x2= 34
14x3=42
34+42=76

So Charmaine is 14
William is 17

4 0

3 years ago

Is the statement (-1)n = -1 true for any positive integer n? Explain.

Rashid [163]

Answer:

it has to equal -1 x= to -1 parenthesees

1 times -1= -1 its true for that 1 answer but not the others

7 0

3 years ago

7/9 - 2/3 and 2/3 - 1/6

arsen [322]

Answer:

The answer is 1/9 and 1/2

7 0

3 years ago

Read 2 more answers

Hi! I need help with the attached question in calc. Thank you:)

Elena L [17]

Answer:

3π square units.

Step-by-step explanation:

We can use the disk method.

Since we are revolving around AB, we have a vertical axis of revolution.

So, our representative rectangle will be horizontal.

R₁ is bounded by y = 9x.

So, x = y/9.

Our radius since our axis is AB will be 1 - x or 1 - y/9.

And we are integrating from y = 0 to y = 9.

By the disk method (for a vertical axis of revolution):

$\displaystyle V=\pi \int_a^b [R(y)]^2\, dy$

So:

$\displaystyle V=\pi\int_0^9\Big(1-\frac{y}{9}\Big)^2\, dy$

Simplify:

$\displaystyle V=\pi\int_0^9(1-\frac{2y}{9}+\frac{y^2}{81})\, dy$

Integrate:

$\displaystyle V=\pi\Big[y-\frac{1}{9}y^2+\frac{1}{243}y^3\Big|_0^9\Big]$

Evaluate (I ignored the 0):

$\displaystyle V=\pi[9-\frac{1}{9}(9)^2+\frac{1}{243}(9^3)]=3\pi$

The volume of the solid is 3π square units.

Note:

You can do this without calculus. Notice that R₁ revolved around AB is simply a right cone with radius 1 and height 9. Then by the volume for a cone formula:

$\displaystyle V=\frac{1}{3}\pi(1)^2(9)=3\pi$

We acquire the exact same answer.

8 0

3 years ago

Is 73 a prime number

lora16 [44]

Hi there,

73 indeed a prime number

A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. A natural number greater than 1 that is not a prime number is called a composite number!

6 0

3 years ago