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3 years ago

Help me pleaseeeee !!!!!!!!

Mathematics

1 answer:

yan [13]3 years ago

5 0

Answer:

Step-by-step explanation:

13). K( - 5 , - 2 ) ----> ( - 5 - 6 , - 2 - 2 ) = K'( - 11 , - 4 )

14). Rule of the reflection in the y-axis is ( x , y ) -----> ( - x , y )

L( 1 , - 3 ) -----> L'( - 1 , - 3 )

15). Rule of the 90° Counterclockwise rotation is ( x , y ) -----> ( - y , x )

Z( - 7 , 2 ) ----> Z'( - 2 , - 7 )

16). Rule of the dilation by the scale "k" is ( x , y ) ----> ( kx , ky )

F( - 4 , 6 ) ----> ( - 4*1.5 , 6*1.5 ) = F'( - 6 , 9 )

17). Rule of the reflection in the x-axis and the dilation by the scale "k" is

( x , y ) -----> ( kx , - ky )

X( - 3 , 9 ) -----> ( - 3*(1/3) , - 9*(1/3) ) = X'( - 1 , - 3 )

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kicyunya [14]

Answer:

vertical angles

Step-by-step explanation:

a vertical angle is an angle that mirrors each other and/or intersects and those two angles do mirror each other! hope this is right!

5 0

3 years ago

A sector with a radius of 15cm has a central angle measure of 8pi/5 (in radians)

hodyreva [135]

Answer:

565.49 cm2

Step-by-step explanation:

The area of a circle is given by:

Area = pi * r^2

And the whole area represents a central angle of 2pi.

Then, to find the area of this sector, we just need to use a rule of three:

area of pi * r^2 -> central angle of 2pi

area of x -> central angle of 8pi/5

x * 2pi = pi * r^2 * 8pi/5

2x = r^2 * 8pi/5

x = r^2 * 4pi/5 = 15^2 * 4pi/5 = 565.49 cm2

4 0

3 years ago

Factor the polynomial:81m+48mn

Anton [14]

To factor this polynomial you will have to first find the GCF of 81 and 48 and its 3.

So then you put 3 out the parentheses. 3(----).

Then you have to see how many times 3 goes into 81m and 48m. It is 27m and 16mn.

So then this is what you get, 3(27m-16mn)

Hope it helps you!!!

7 0

3 years ago

The mass of a particular substance is known to grow exponentially at a rate of 1.5% per day. Its initial mass was 230 grams and,

Papessa [141]

Answer:

23 days

Step-by-step explanation:

Given that the mass of a particular substance is known to grow exponentially at a rate of 1.5% per day

Initial mass = $230 gm$

After t days, mass = $325 gm$

The equation is

$P(t) = 325 = 230 (1+\frac{1.5}{100} )^t\\\frac{325}{230} =1.015^t\\log 1.413 = t log 1.015\\t = \frac{log 1.413}{log 1.015} =\frac{0.1502}{0.0065} \\=23.229$

Approximately after 23 days the mass will become 325 gms.

7 0

4 years ago

Compare the decimals 121.3 and 121.30

stich3 [128]

They are the same thing

5 0

4 years ago

Read 2 more answers