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3 years ago

Plz it is 30 points

Mathematics

1 answer:

ddd [48]3 years ago

3 0

Answer:

1:10

Step-by-step explanation:

2:20 is the original ratio. Simplify to 1:10

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The general form of the equation of a circle is 7x2 + 7y2 − 28x + 42y − 35 = 0. The equation of this circle in standard form is

marta [7]

7 x² + 7 y² - 28 x + 42 y - 35 = 0 /: 7
x² + y² - 4 x + 6 y - 5 = 0
( x² - 4 x + 4 ) + ( y² + 6 y + 9 ) - 4 - 9 - 5 = 0
The equation in the standard form is:
( x - 2 )² + ( y + 3 )² = 18
The center is at the point ( 2, - 3 ).
Its radius is: √18 = 3√2 units.

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4 years ago

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What percentage is equal to the fraction 4 over 25?

Vikki [24]

4/25 = 0.16. 0.16 is equal to 16%

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3 years ago

Theo is using this spinner to predict the favorite movie genre of randomly chosen students in his school. If Theo spins the spin

marusya05 [52]

Answer:

Option B.

Step-by-step explanation:

In the question the number categories on the spinner are not given.

Consider there are 5 different categories on the spinner.

A = Spinner land on "Action".

So, probability of land on "Action" is

$P(A)=\frac{1}{5}$

Number of spins, n= 60 times

The expected number of land on "Action" is

$\text{Expected value}=n\times P(A)$

$\text{Expected value}=60\times \frac{1}{5}$

$\text{Expected value}=12$

Therefore, the correct option is B.

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4 years ago

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someone please help me! i’m being timed and if you don’t know it, please don’t guess! thank you in advance

STatiana [176]

Answer:

c=90

a=56

b=34

Step-by-step explanation:

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3 years ago

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Find the value of x in the isoscleles triangle sqrt45 and altitude 3

Alisiya [41]

Answer:

$c.\hspace{3}x=12$

Step-by-step explanation:

Isosceles triangles are a type of triangles in which two of their sides have an identical length. It should be noted that the angles opposite the sides that are the same length are also the same. This means that these triangles not only have two equal sides, but also two equal angles.

You can solve this problem using different methods, I will use pythagorean theorem. First take a look at the picture I attached. As you can see:

$x=2a$