3x+4y=9

-4y -4y

3x=-4y+9

/3 /3

x = -4/3y+3

X-intercept =3

To find if it’s a right-angled triangle, we will have to use Pythagorean Theorem:

a² + b² = c²

1st triangle: (yes, it is)

40 ² + 30 ² = 50 ²

1600 + 900 = 2500

2500 = 2500

2nd triangle: (No)

15 ² + 21 ² = 26 ²

666 = 676

3rd triangle: (Yes)

1.8 ² + 8 ² = 8.2 ²

67.24 = 67.24

4th triangle: (No)

85 ² + 85 ² = 121 ²

14450 = 14641

Wag umasa sa brainly

**Step-by-step explanation:**

Labot

**Answer:**

24 students prefer pepsi to coke

**Step-by-step explanation:**

84 divided by 7 is 12

12 times five is 60

84 minus 60 results in 24 students

**Answer:**

**Step-by-step explanation:**

-2 + 2(3) =-2 +6 = 4 for the 2nd equation

2(-2) + 4(3) = -4 +12 = 8 for the 2nd equation

(-2,3) satisfies both equations

let x = 0, then y= 2 (0,2) is another solution

there's multiple solutions, including (-2,3) and (0,2). That eliminates all answers except the first

Try graphing the two equations. They're the same line, with an infinite number of points on the line, which means an infinite number of solutions.