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s2008m [1.1K]
3 years ago
15

3.

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
6 0

Answer:

Step-by-step explanation:

The four sides of a square are equal.

7x + 3 = 5x + 8             Subtract 5x from both sides

7x - 5x + 3 = 8              Combine the left

2x + 3 = 8                     Subtract 3 from both sides

2x = 8-3                        Combine the right

2x = 5                           Divide by 2

x = 5/2

x = 2.5

That is not quite the answer

Side = 7x + 3

Side = 7*2.5 + 3

Side = 17.5 + 3

Side = 20.5

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Consider the equation
sergij07 [2.7K]

Answer:

B. (-6, -9)

D. (12, 3)

Step-by-step explanation:

y=mx+b is the format for this problem.

2/3 is m and -5 is b

The b is the y-intercept which is the point where the line crosses from one side of the graph to the other horizontally. You can see at -5, that is where that happens.

Then, to find the second point, you would move the -5 up 2 and right 3 points because the slope is 2/3.

You can then look at another point of the graph to find (-6, -9)

*Changed my answer from just B to B and D

4 0
2 years ago
The mean of eight numbers is 41.  The mean of two of the numbers is 29. What is the mean of the other six numbers​
GarryVolchara [31]

Answer:

45

Step-by-step explanation:

The mean is calculated as

mean = \frac{sum}{count}

Given the mean of 8 numbers is 41 , then

\frac{sum}{8} = 41 ( multiply both sides by 8 )

sum of 8 numbers = 328

Given the mean of 2 numbers is 29 , then

\frac{sum}{2} = 29 ( multiply both sides by 2 )

sum of 2 numbers = 58

The sum of the remaining 6 numbers = 328 - 58 = 270 , so

mean = \frac{270}{6} = 45

The mean of the other 6 numbers = 45

8 0
3 years ago
Which answer shows the foil mthod used to expand the product below (2x+3)(2x^2-5)
Leona [35]
FOIL = First, Outside, Inside, Last

First - 2x*2x^2
Outside - 2x*(-5)
Inside - 3*2x^2
Last - 3*(-5)

Putting all of this together, we get 2x*2x^2 + 2x*(-5) + 3*2x^2 + 3*(-5), which would be option B
7 0
4 years ago
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mote1985 [20]
I think it might be B. but im not sure.
7 0
4 years ago
Read 2 more answers
Help please will mark brainliest
natima [27]

Answer:

A table that has (0,0), (-1,1), (-4, 2) and undefined for any positive x value

Step-by-step explanation:

Reflecting across the y axis just changes the x values, it makes them negative.  so \sqrt{x} has points (0,0), (1,1), (4, 2) and so on.  reflecting over the y axis makes them(0,0), (-1,1), (-4, 2) and again so on.

Also good to mention in \sqrt{x} negative x values are undefined, so flipped over the y axis positive x values are undefined.

As for the answer it doesn't look like any of those shown.  The first one is close, but the x values would need to swap their signs.  

6 0
3 years ago
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