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Harlamova29_29 [7]
2 years ago
15

Vanessa uses the expressions (3x² + 5x + 10) and (x² – 3x - 1) to represent the length and width of her patio.

Mathematics
1 answer:
Kay [80]2 years ago
5 0

Answer:

a) 3x⁴-4x³-8x²-35x-10

Step-by-step explanation:

3x2(x²-3x-1)+5x(x²-3x-1)+10(x²-3x-1)

3x⁴-9x³-3x²+5x³-15x²-5x+10x²-30x-10

3x⁴-9x³+5x³-3x²-15x²+10x²-5x-30x-10

3x⁴-4x³-8x²-35x-10

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In a fitness program, Pedro does 20 sit-ups on the first day, and increases this by 2 sit-ups everyday. Determine the day when t
Fittoniya [83]

Answer:

day 540

Step-by-step explanation:

He increases his number of situps by 2 each day meaning on day 1 he'd do 2 extra, on day 2 he'd do 4 extra, on day he'd do 6 extra etc. We can show this by saying +2x where x is the day he is on.  Then since he started with 20 we have to add 20 so it would be 20+2x.  We want to know what day it is when he does 1100 situps so we can set our equation equal to 1100 and solve for X which is the day it would be.

20+2x=1100

2x=1080

I hope this helps and please don't hesitate to ask if there is anything still unclear!

x=540

5 0
3 years ago
Does the image have rotational symmetry? If so, by how many degrees?
Goshia [24]

<em>☽------------❀-------------☾</em>

<em>Hi there!</em>

<em>~</em>

<em>Yes, the image has </em><u><em>rotational symmetry</em></u><em>. I think about </em><u><em>180 degrees</em></u><em> if i did this this right.</em>

<em>❀Hope this helped you!❀</em>

<em>☽------------❀-------------☾</em>

<em></em>

4 0
2 years ago
I will give lots of points please help
creativ13 [48]

Answer:

yes it is a right triangle if you look closely at triangle ABC there is a right triangle mark the little square

3 0
1 year ago
Read 2 more answers
Michael's bank account opened with $100. 5 weeks after opening, his account balance was $250.
cupoosta [38]
I am pretty sure it is $400. sorry if i’m wrong
8 0
2 years ago
Whats the least common denominator of 9, 13, and 20
aliya0001 [1]

Answer:

13 = 13  

20 = 2^2 • 5  

9 = 32

Prime Factor   Number 13   Number 20   Number 9    L.C.M  

   2                         0                        2                     0               2

   3                          0                        0                     2               2                                                  

   5                          0                         1                     0                  1  

 

   13                         1                         0                    0                   1

6 0
2 years ago
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