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3 years ago

8

What scale factor was applied to the large rocket to produce the small rocket? Show your work and clearly mark your final answer

. (Remember, the small rocket is 20 cm long and the large rocket is 100 cm long).

1 answer:

Kryger [21]3 years ago

6 0

Answer:80

Step-by-step explanation:

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A bag contains 7 pears and 3 apples. If you select 2 pieces of fruit without looking, how many ways can you get 2 pears.

enot [183]

Answer:

There are 2 ways, since we'd chosen 2 fruits

PROBABILITY:

( $\frac{2}{10}$ = $\frac{1}{5}$ ) or $\frac{1}{10}$

METHOD:

In the 2 fruits we took both of them might be pears either maybe one of them can be a pear. The same is possible with the other fruit.

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3 years ago

Which of the following describes a similarity between a solid and a gas

lyudmila [28]

Answer:

they are both states of matter
they are both made up of atoms, molecules and ions
they both have volume

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3 years ago

Determine the next step for solving the quadratic equation by completing the square

GaryK [48]

Answer:

The two solutions are: $x=\frac{1}{2}+/-\frac{\sqrt{7} }{2}$

The next and every step are below.

Explanation:

1. $-3=-2x^2+2x$ : Given (addition property / add - 3 to both sides)

2. $-3 = - 2(x^2-x)$ : Given (commom factor - 2)

3. $-3-1/2=-2(x^2-x+1/4)$

To obtain the perfect square it was added the square of half of the coefficient of x: (1/2)² = 1/4, inside the parenthesis.

Since, the terms inside the parentthesis are multiplied by - 2, you have to add - 2 (1/4) = - 1/2 to the left side of the equation.

4. Now, you have that the trinomial x² - x + 1/4 is a square perfect trinomial which is factored as (x - 1/2)² and get the expression:

$-7/2=-2(x-1/2)^2$

5. Divide both sides by - 2 to get the next expression:

$-7/4=(x-1/2)^2$

6. The last step is to extract squere root from both sides of the equality:

$(x-1/2)=+/-\sqrt{\frac{7}{4}}\\ \\ x-1/2=+/-\frac{\sqrt{7} }{2}\\ \\ x=\frac{1}{2}+/-\frac{\sqrt{7} }{2}$

8 0

3 years ago

A cylinder has a volume of 540 cm cubed. if the height of the cylidner is 15 cm, find the radius.

Tamiku [17]

You should always remember that a cylinder consists of circles that are all over each other to form the height of the cylinder.
So the volume of the cylinder= the area of the surface circle* the height.
$V=540=\pi r^2*h= \pi r^2*15$
Then,
$r^2= \frac{540}{15 \pi }$
So, $r= \sqrt{\frac{540}{15 \pi }}$
radius is approximately 3.4cm
*If you cannot see the equations properly please wait till it downloads or refresh the page*
Hope this helps.

6 0

3 years ago

Help explain an show work thank you so much!

Dominik [7]

5 is (D)...…………………okay

7 0

3 years ago