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3 years ago

10

Cynthia wants to buy a round photo frame for her brother. the radius of the photo frame is 9 cm. what is the photo frame circumf

erence?

1 answer:

Vsevolod [243]3 years ago

8 0

Answer:

I don't know

Step-by-step explanation:

You gave me the wrong answer on study island.

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Which expression represents -3/4 and -0.2 on a number line

olga_2 [115]

Step-by-step explanation:

Plot -3/4 in between -1/2 and -1

Plot -0.2 in between -0.3 and -0.1 or between -2/5 and 0.

<h3><u><em>Hope this helps!!! </em></u></h3><h3><u><em>Please mark this as brainliest!!! </em></u></h3><h3><u><em>Thank You!!! </em></u></h3><h3><u><em>:)</em></u></h3>

6 0

3 years ago

HEELLPP plss!!!!!!!!<br><br> Solve

Elanso [62]

The top answer on your screen is the answer. Hope this help

6 0

3 years ago

Use the substitution method to solve.<br><br> y=5−3x<br> 5x−4y=−3

Vadim26 [7]

Well just substitute y (the first equation) into the second equation.
So
5x-4(5-3x)=-3
Then just solve the equation from there.
5x-20+12x=-3
17x=17
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and if you need y, y=2

6 0

3 years ago

Determine the commutators of the operators a and a+,where a = (x + ip)/2 ^1/2 and a+ = (x - ip)/ 2 ^1/2

Vsevolod [243]

Answer:

Given that:

$a = (\frac{x+ip}{2})^{\frac{1}{2}}$ and $a+= (\frac{x-ip}{2})^{\frac{1}{2}}$

if a , a+ commutator, it obeys $aa^+ = a^+a$

First find:

$aa^+ = (\frac{x+ip}{2})^{\frac{1}{2}} (\frac{x-ip}{2})^{\frac{1}{2}}$

= $(\frac{(x)^2-(ip)^2}{4})^{\frac{1}{2}}=(\frac{(x)^2+(p)^2}{4})^{\frac{1}{2}}$

Now;

$a^+a =(\frac{x-ip}{2})^{\frac{1}{2}} (\frac{x+ip}{2})^{\frac{1}{2}} = (\frac{(x)^2-(ip)^2}{4})^{\frac{1}{2}}$

= $(\frac{(x)^2-(ip)^2}{4})^{\frac{1}{2}}=(\frac{(x)^2+(p)^2}{4})^{\frac{1}{2}}$

therefore, $aa^+ = a^+a$ which implies the operators a and a+ are commutators.

7 0

3 years ago

A packet of 33 Marbles needs to be split between Gavin and Howard in the ratio of 5:6. How many marbles will each boy get.

Eduardwww [97]

Answer:

15 and 18

Step-by-step explanation:

33 split into groups of 5 and 6

8 0

2 years ago