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dexar [7]
3 years ago
10

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
<h3>M(x,y)=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})</h3>
  • 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:

9

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
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