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2 years ago

11

(3x²+4x-1)+(-2x²-3x+2)

2 answers:

antiseptic1488 [7]2 years ago

4 0

The answer is: 3x^2 +x-3

Troyanec [42]2 years ago

3 0

Answer:

x

Step-by-step explanation:

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What are 2 equivalent expressions that are equal to 10m-40

yuradex [85]

It's simple, there is a ton
Multiply all the numbers by 2: 20m - 80
or Divide all the numbers by 2: 5m- 20
or Multiply all the numbers by 3: 30m - 120

4 0

3 years ago

Read 2 more answers

Round <br> 0.655<br> to one decimal place.

Virty [35]

Answer:

0.7

Step-by-step explanation:

If we're rounding to one decimal place, we need to round up since it's 0.65.

8 0

3 years ago

Read 2 more answers

A student on a piano stool rotates freely with an angular speed of 2.85 rev/s . The student holds a 1.50 kg mass in each outstre

Vlad1618 [11]

Answer:r'=0.327 m

Step-by-step explanation:

Given

$N=2.85 rev/s$

angular velocity $\omega =2\pi N=17.90 rad/s$

mass of objects $m=1.5 kg$

distance of objects from stool $r_1=0.789 m$

Combined moment of inertia of stool and student $=5.53 kg.m^2$

Now student pull off his hands so as to increase its speed to 3.60 rev/s

$\omega _2=2\pi N_2$

$\omega _2=2\pi 3.6=22.62 rad/s$

Initial moment of inertia of two masses $I_0=2mr_^2$

$I_0=2\times 1.5\times (0.789)^2=1.867$

After Pulling off hands so that r' is the distance of masses from stool

$I_0'=2\times 1.5\times (r')^2$

Conserving angular momentum

$I_1\omega =I_2\omega _2$

$(5.53+1.867)\cdot 17.90=(5.53+I_o')\cdot 22.62$

$I_0'=1.397\times 0.791$

$I_0'=5.851$

$5.53+2\times 1.5\times (r')^2=5.851$

$2\times 1.5\times (r')^2=0.321$

$r'^2=0.107009$

$r'=0.327 m$

7 0

3 years ago

Recall that you can use the built-in functions rem(m,n) or mod(m,n)to find the remainder of the division m/n.

suter [353]

The answer is B hope this helped

5 0

3 years ago

The sum of two numbers is 21. The larger number is 6 less than twice the smaller number. Find the two numbers.

Vesnalui [34]

Hey there! :D

21= 2x-6+x

21=3x-6

27=3x

x=9

The smaller number is 9.

The larger number is:

9*2= 18 18-6= 12

The larger number is 12.

I hope this helps!
~kaikers

3 0

3 years ago