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4 years ago

9

PLEASE HELP! I will mark you Brainlest if you answer correctly and the fastest. It doesn’t give me the option to mark someone Br

ainlest until two people have responded to the question. Thank you! :)

1 answer:

Vesnalui [34]4 years ago

4 0

Answer:

Any point has form P(x,y).

Then

AA' = ( A'x -Ax, B'y- By ) = (2-3, 3- (-4))=(-1,7)

=>A' is image of A under translation: 1 to the left (-1), 7 up(+7)

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Distributive property/collecting like terms. 4n -2 - 2n

marusya05 [52]

Distributive property: a(b + c) = ab + ac

4n - 2 - 2n = 2(2n - 1 - n)

4n - 2 - 2n = 2n - 2 = 2(n - 1)

7 0

3 years ago

Prove that the triangle EDF is isosceles. Give reasons for your answer.

Gekata [30.6K]

Answer:

$\triangle EDF$ is isosceles.

Step-by-step explanation:

Please have a look at the attached figure.

We are <u>given</u> the following things:

$\angle EDF = y$

$\text{External }\angle DFG = 90 +\dfrac{y}{2}$

Let us try to find out $\angle E$ and $\angle DFE$ . After that we will compare them.

<u>Finding </u> $\angle DFE$ <u>:</u>

Side EG is a straight line so $\angle GFE = 180$

$\angle GFE$ is sum of internal $\angle DFE$ and external $\angle DFG$

$\angle GFE = 180 = \angle DFE + \angle DFG\\\Rightarrow 180 = \angle DFE + (90+\dfrac{y}{2})\\\Rightarrow \angle DFE = 180 - 90 - \dfrac{y}{2}\\\Rightarrow \angle DFE = 90 - \dfrac{y}{2} ....... (1)$

<u>Finding </u> $\angle E$ <u>:</u>

<u>Property of external angle:</u> External angle in a triangle is equal to the sum of two opposite internal angles of a triangle.

i.e. external $\angle DFG$ = $\angle E + \angle EDF$

$\Rightarrow 90+\dfrac{y}{2} = \angle E + y\\\Rightarrow \angle E = 90+\dfrac{y}{2} -y\\\Rightarrow \angle E = 90-\dfrac{y}{2} ....... (2)$

Comparing equations (1) and (2):

It can be clearly seen that:

$\angle DFE = \angle E =90-\dfrac{y}{2}$

The two angles of $\triangle EDF$ are equal hence $\triangle EDF$ is isosceles.

8 0

3 years ago

A rectangular photo frame covers an area of 20 square inches on a wall. The width of the frame is 1 inch less than its length. F

Salsk061 [2.6K]

You need to find two factors of 20 that are consecutive: 4,5.
Answer: 5inx4in

7 0

4 years ago

-3 ( -4 - 5x) = -18 i'll help with your questions :)))

maria [59]

Answer:

-15

Step-by-step explanation:

-3(-4-5x)= -18

12+15x= -18-12

15x= -30

x= -30÷15

x= -15

6 0

4 years ago

49 = -5n – 2n<br> I think I know the answer but just wanna be sure?

Svetach [21]

Answer:

n = -7

Step-by-step explanation:

49 = -5n - 2n

combine like terms

-5 - 2 = -7

49 = -7n

divide both sides by -7

49/-7 = -7n/-7

49/-7 = n

49/-7 = -7

-7 = n

3 0

3 years ago