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Natali [406]
2 years ago
5

How can you tell if two equations for parallel lines or perpendicular lines. please explain?

Mathematics
2 answers:
kicyunya [14]2 years ago
5 0
To find out if they are parallel we need to see if the gradient is the same, to do this we need to get y in terms of x:
assuming the first equation is x+y+7=0
y=-x-7
and
y=x-3
The gradient is the coefficient of x (the number infront of x)
For equation 1 the gradient is -1, and for number 2 it is 1, therefore they are not parallel.
However to check if they are perpendicular we need to see if their gradients multiply to equal -1.
-1*1=-1 therefore they are perpendicular
sesenic [268]2 years ago
5 0
X + y = 7
<u>x -  y = 3</u>
   <u>2x</u> = <u>10</u>
    2      2
     x = 5
5 + y = 7
<u>-5       -5</u>
     y = 2
(x, y) = (5, 2)
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galina1969 [7]
So, what is the total lenght of the pieces that wer cut off?

we multiply the lenght by the number:

4 \frac{1}{3}*5=20+\frac{5}{3}=21\frac{2}{3}

and we subtract this from the original pipe, that is

30\frac{3}{4}-21\frac{2}{3}

we need to bring the two fractions to the same denominator (by multiplying the fraction art in the first by 3 and 4 the second):

30\frac{9}{12}-21\frac{8}{12}=9 \frac{1}{12}

so the correct answer is D!




3 0
3 years ago
WILL MARK BRANLIEST!!the tables below shows the values of y corresponding to different values of x
Kitty [74]

Answer: I'm pretty sure that it´s C but Im not sure.

Sorry if that's wrong.

7 0
3 years ago
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Karl is putting a frame around a rectangular photograph. The photograph is 14 inches long and 10 inches wide, and the frame is t
Sergeu [11.5K]
<h2>The area of the framed photograph = 1156 inch^{2}</h2>

Step-by-step explanation:

Given,

The length of photograph (l) = 14 inches and

The breadth of photograph (b) = 10 inches

To find, the area of the framed photograph = ?

We know that,

The area of the framed photograph = (l + 2b)(l + 2b)

= (14 + 2 × 10) (14 + 2 × 10) inch^{2}

= (14 + 20) (14 + 20) inch^{2}

= (34) (34) inch^{2}

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∴ The area of the framed photograph = 1156 inch^{2}

8 0
3 years ago
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Musya8 [376]

Let's simplify by step

28x-12+2x-4-x

28x+-12+2x+-4+-x

Combine like terms

28x+-12+2x+-4+-x

(28x+2x+-x)+(-12+-4)

29x+-16

= 29x-16


I hope that's help !

8 0
3 years ago
X is an even 3-digit integer ending to zero. Which of the following is an
insens350 [35]

Answer: Don't know sorry

Step-by-step explanation:

5 0
2 years ago
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