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3 years ago

HELP ME AND PLEASE HURRY

Mathematics

1 answer:

Damm [24]3 years ago

8 0

The answer is sometimes true

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????(−2, 10) is the midpoint of . If ???????? has coordinates (4, −5), what are the coordinates of ?????

Sonbull [250]

Answer:

The coordinates of B are (-8,25).

Step-by-step explanation:

Consider the completer question is " M(−2, 10) is the midpoint of AB. If A has coordinates (4, −5), what are the coordinates of B".

Let coordinates of B are (a,b).

Formula for midpoint:

$Midpoint=(\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2})$

Midpoint of A and B is

$Midpoint=(\dfrac{4+a}{2},\dfrac{-5+b}{2})$

It is given that M(−2, 10) is the midpoint of AB.

$(-2,10)=(\dfrac{4+a}{2},\dfrac{-5+b}{2})$

On comparing both sides we get

$-2=\dfrac{4+a}{2}$

Multiply both sides by 2.

$-4=4+a$

Subtract 4 from both sides.

$-8=a$

The value of a is 8.

Similarly,

$10=\dfrac{-5+b}{2}$

Multiply both sides by 2.

$20=-5+b$

Add 5 on both sides.

$25=b$

Therefore, the coordinates of B are (-8,25).

8 0

4 years ago

12. Carmen multiplied a non-zero rational number by its additive inverse. Which statement about the product must be true?

nignag [31]

Answer:

Option C. The product was negative.

Step-by-step explanation:

Let the non-zero rational number is = $\frac{x}{y}$

So, its additive inverse = $-\frac{x}{y}$

The result of multiplication the non-zero rational number by its additive inverse = $\frac{x}{y} *-\frac{x}{y} =-\frac{x^2}{y^2}$

We will check the options:

A. The product was the multiplicative inverse of the original number.

Wrong because the product = $\frac{x}{y} *-\frac{x}{y} =-\frac{x^2}{y^2}$

B. The product was the additive inverse of the original number.

Wrong because the product = $\frac{x}{y} *-\frac{x}{y} =-\frac{x^2}{y^2}$

C. The product was negative.

True

D. The product was positive.

Wrong because the product was negative.

So, the answer is option C.

6 0

3 years ago

In the figure below, what is the length of PS in terms of x please help

3241004551 [841]

Answer:

B) x+22

Step-by-step explanation:

PS= PQ+QR+RS

PS= 2x+4+8+10-x

PS= x+22

Hope this helps you.

8 0

3 years ago

Read 2 more answers

If sin 2X = COS ZY and m2X = 72°, what is the measure of ZY? 18° 072° 90° 108°

KATRIN_1 [288]

Answer:

18°

Step-by-step explanation:

sin 2x=cos zy

m(2x)=72°

cos(π/2-a)=sin a

cos(π/2-72°)=sin72°

cos18°=sin72°

=>m(zy)=18°

5 0

3 years ago

Read 2 more answers

Can u help with this asap

Zolol [24]

Answer:

Step-by-step explanation:

-7x<-21

x<-3

7 0

3 years ago