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Alex73 [517]
3 years ago
15

Which pair of equations are perpendicular lines? A. 5x + 2y = 9 and y = –5/2x+27/2 B. x – 3y = 11 and y = –3x + 23 C. 4x + 2y =

6 and y = –2x + 18 D. x – 3y = 5 and y = 3x – 1
Mathematics
1 answer:
svlad2 [7]3 years ago
8 0
There is a really easy way to do this problem and that is to use a graphing website

after punching in the functions:

A. depending of whether it is -5/(2x) or (-5/2)x: intersecting but not perpendicular or parallel
B. These two lines are perpendicular
C. Parallel lines
D. intersecting but not perpendicular
You might be interested in
Which expression is equivalent to (3x² + 3x - 3) - (6x² - 4x - 2)?
Marat540 [252]

Answer:

A. 12x^{4} -4x^{3} +3x^{2} +3x+20

Step-by-step explanation:

For this problem, we have to combine like terms.

Let's look at the equation:

(12x^{4} -4x^{3} +7x+6)+(3x^{2} -4x+14)

12x^{4, -4x^{3}, 3x^{2} do not have any other like terms, so we keep all in the final answer.

7x and -4x are like terms, so we combine them. 7x-4x=3x

14 and 6 are like terms, so we combine them. 14+6 = 20

Let's put everything into the final equation:

12x^{4} -4x^{3} +3x^{2} +3x+20

So, the final answer is A. 12x^{4} -4x^{3} +3x^{2} +3x+20

Hope this helps! If you have any questions about my work, leave them in the comments below!

5 0
2 years ago
On the coordinate plane shown, each grid unit represents 10 feet. Polygon QRST has vertices Q(10, 30), R(−20, 30), S(−20, −10),
max2010maxim [7]

P  140 units

A  1200 units^2

Step-by-step explanation:

The length of the rectangle is 20 to -20 = 20 - -20 = 40 units

The width of the rectangle is 20 to -10 = 20 - -10 = 30 units

The perimeter is given by

P = 2 ( l+w) = 2 (40+30) = 2 (70) = 140 units

The area is given by

A = lw = 40*30 = 1200 units^2

4 0
3 years ago
Find the greatest common factor of 14y^2 and 15y^4
matrenka [14]

Answer:

I have to say, I was a bit stumped on this one for some reason, but I believe your answer is y^2.

Step-by-step explanation:

All four variables , (14, 15, y^2, & y^4) should all have a common denominator, but I only see similarities in y^2 with y^4 and 14 with 15, but the y's can be understood ones. Multiply your common variables and get y^2. Could someone check me in that though?

3 0
3 years ago
Rule 1: Multiply by 2 then add 1 starting from 1.
shusha [124]

Rule 1: Multiply by 2 then add 1 starting

( n x 2 +1) => 2n + 1

n is the position of our terms, so I substitute 1 because you're told to start from 1 which becomes our first term

2n + 1

2 x 1 + 1 =3

2 x 2 + 1 = 5

2 x 3 + 1 = 7

2 x 4 + 1 = 9

3,5,7,9....

(you can clearly see the sequence increasing by 2 each time, not following Multiply by 2 then add 1)

However, if we were to do add one each time, you'll add one to your pervious answer. So, this time I'll substitute the pervious answer

2 x 1 + 1 =3

2 x 3 + 1 = 7

2 x 7 + 1 = 15

2 x 15 + 1 = 31

3,7,15,31....

(from 3 to 7, you clearly see its multiplied by 2, then +1 & that's our sequence, this method apply to the second rule too of using previous)

Rule 2: Divide by 2 then add 4

(n ÷ 2 + 4) => n/2 + 4

n/2 + 4

(starting from 40.)

40/2 + 4 = 24

24/2 + 4 = 16

16/2 + 4 = 12

12/2 + 4 = 10

24,16,12,10.....

Answer: (started off with the number it asked of)

R 1 -

1,3,7,15,31....

(1 x 2 +1 does give 3)

R 2 -

40, 24,16,12,10.....

(40÷2 = 20, then + 4, gives 24)

Hope this helps!

6 0
2 years ago
100 POINTS!!!
Kay [80]

Answer:

17,045$+ annual and monthly is $1420.47+

Step-by-step explanation:

3900×12+676×12-561=50,751-67,796=17,045÷12=1,420.466666667 or 1,420.47 a month and bills of -3900×12 paid throughout year -676×12 paid throughout year -561×1 paid throughout year your earnings are 133.58554511% of your total living cost and equal to 1⅓ or 133/100 as your extra money for vacations and savings equal ⅓ as 17,045 is ⅓ of 50,751 or close enough at annual total of $67,796 or buy crypto.www

4 0
2 years ago
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