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3 years ago

3(a+b) and 3a+b is this equivalent or non equivalent

Mathematics

1 answer:

anyanavicka [17]3 years ago

8 0

Answer:

non equivelent

Step-by-step explanation:

just as an example to prove my awnser lets make a=1 and b=2

3(1+2)=9

3(1)+2=5

it would be equivelent if they both equaled the same number. :P

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The midpoint of segment AB is (4, 2). The coordinates of point A are (2, 7). Find the coordinates of point B.

erastovalidia [21]

Answer:

<h3>The option B) is correct</h3><h3>Therefore the coordinate of B $(x_2,y_2)$ is (6,-3)</h3>

Step-by-step explanation:

Given that the midpoint of segment AB is (4, 2). The coordinates of point A is (2, 7).

<h3>To Find the coordinates of point B:</h3>

Let the coordinate of A be $(x_1,y_1)$ is (2,7) respectively
Let the coordinate of B be $(x_2,y_2)$
And Let M(x,y) be the mid point of line segment AB is (4,2) respectively
The mid-point formula is

Now substitute the coordinates int he above formula we get
$(4,2)=(\frac{2+x_2}{2},\frac{7+y_2}{2})$
Now equating we get

$4=\frac{2+x_2}{2}$ $2=\frac{7+y_2}{2}$

Multiply by 2 we get Multiply by 2 we get

$4(2)=2+x_2$ $2(2)=7+y_2$

$8=2+x_2$ $4=7+y_2$

Subtracting 2 on both

the sides Subtracting 7 on both the sides

$8-2=2+x_2-2$ $4-7=7+y_2-7$

$6=x_2$ $-3=y_2$

Rewritting the above equation Rewritting the equation

$x_2=6$ $y_2=-3$

<h3>Therefore the coordinate of B $(x_2,y_2)$ is (6,-3)</h3><h3>Therefore the option B) is correct.</h3>

7 0

4 years ago

Brain and Zach went to village grille for lunch. Brian's lunch cost $4 less than 3 times Zach's. The total cost for lunch was $2

LuckyWell [14K]

Answer:

The cost for Zach's lunch is 12, and for Brain's lunch it cost 8.

Step-by-step explanation:

Since, I am sorry, you can answer from here in out. ;)

4 0

3 years ago

I NEED HELP ASAP!!!!!!!!!!!!!!!! Find the length of the segment AB

Fittoniya [83]

Answer:

Step-by-step explanation:

First, we need to find how far away the points are from 0.

|7| = 7

|-2| = 2

Now, we add them together.

7 + 2 = 9

Hope this helped!

8 0

3 years ago

For every 140 feet that kelly rides on her bicycle, the wheels turn 20 times. About how many times do the wheels turn in 5 miles

o-na [289]

Answer:

Approximately 3771 times

Step-by-step explanation:

Let x be the number of times the wheels turn in 5 miles.

Given that, 1mile = 5,280ft

Thus, 5 miles=5 × 5,280ft=26400ft

From the question ,we can deduce the following ratios :

140 ft : 20 mins

26400ft : x

Cross multiply;

$\implies \: x \times 140 = 26400 \times 20$

$\implies140x =528000$

Divide through by 140.

$\implies \frac{140x}{140} = \frac{528000}{140}$

$\implies x=3771.43$

6 0

3 years ago

Read 2 more answers

I NEED HELP ASAP!! I'LL GIVE BRAINLIEST TO THE CORRECT ANSWER!!!

andreyandreev [35.5K]

Answer:

because this is a parallelogram

=> b - 10 + b + 10 = 180

<=> 2b = 180

=> b = 90

with b = 90 => b - 10 = 80

b + 10 = 100

we also have:

d = b + 10 => d = 100

c = b - 10 => c = 80

Step-by-step explanation:

7 0

3 years ago