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leonid [27]
3 years ago
5

A rectangular swimming pool is 7x – 8 units long and 3x + 5 units wide. Which polynomial best represents the surface area of the

pool in square units? ​
Mathematics
2 answers:
baherus [9]3 years ago
5 0
Multiply 7x-8 and 3x+5, which gives you 21x^2 +35x -24x - 40. This gives you 21^2 + 11x - 40.
lilavasa [31]3 years ago
5 0

Answer:

Step-by-step explanation:

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What is the answer to : 1.3(4.9 + 6k)
HACTEHA [7]

Answer:

you'd get the expression 6.37+7.8k

8 0
3 years ago
Can someone help me with this Im not sure if My answer is correct
sergeinik [125]

Answer:

y = 2x - 3

Yes, your answer is correct.

Step-by-step explanation:

First, find the slope of the two points by using the slope formula:

        y2 - y1

m = -------------

        x2 - x1

         13 - 5

m = -------------

          8 - 4

         8

m = ------- = 2

         4

To find the y-intercept, plug in values into the slope-intercept formula:

y = mx + b

Where m = slope and b= y-intercept. Use any one of the points. I'll be using (4,5):

5 = (2) (4) + b

5 = 8 + b

-3 = b

b = -3

So, putting everything into the slope intercept formula:

y = 2x - 3

4 0
3 years ago
If 2a+3b=12 and ab=6 find the value of 8a^3+27b^3
Alex17521 [72]
<span>A) 2a + 3b = 12
B) ab = 6 solving for a
B) a = 6 / b then we substitute this into equation A)
</span><span>A) 12 / b + 3b = 12  </span><span>multiplying this by "b"
A) 12 + 3b^2 = 12b
A) 3b^2 -12b +12= 0 dividing by "3"
A) b^2 -4b + 4 = 0
Factoring
(b-2) * (b-2) = 0
b = 2
Since b = 2 then a = 3

</span>NOW, we put these numbers into:
<span>8a^3 +27b^3 </span>
8*3*3*3 + 27*2*2*2
216 + 216
The answer is 512


6 0
3 years ago
Read 2 more answers
The distance between the two points (4,1) and (9,1) is​
Rzqust [24]

Answer:

5 units. Since they have the same y coordinate the x coordinate determines the distance from each other. In the case 9-4=5.

6 0
3 years ago
Jude factored 28x2 as (14x)(2x²).
Yuri [45]

Answer:

Only Jude

Step-by-step explanation:

To show 28 x 2  we show 14 x 2 x 2

The x would be cancelled out in this process so x *x would work to enable a product of 56.

8 0
4 years ago
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