Answer:y=5
Step-by-step explanation:
Add 3 to both sides
Simplify
Then, subtract 2y from both sides
all the sides of the triangle are the same because this is equilateral. this means:
(21 - x) = (2x - 3) = (x + 5)
Let's take (x+5) and (2x - 3)
x + 5 = 2x - 3 subtract x from both sides
5 = x -3 add 3 to both sides
8 = x you can rearrange this to x=8
Now it's the fun part! SUBSTITUTION! :D (sarcasm)
<u>BUT WAIT</u> Remember, all of the sides are equal to one another! That means we only have to solve for one side!
Let's do the top side. 21 - 8 = 13
Since there are 3 sides in a triangle, we can easily multiply the 13 by 3
13 x 3 = 39 The perimeter is 39 inches
Answer:
A= 40
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
3/4 (2a-6)+1/2=2/5(3a+20)
(3/4) (2a) + (3/4) (-6) + 1/2 = (3a) + (2/5) (20)
(distribute)
3/2a + -9/2 + 1/2 = 6/5a + 8
(3/2 a) + ( -9/2 + 1/2 ) = 6/5a + 8 (Combine like terms)
3/2a + -4 = 6/5a + 8
3/2a -4 = 6/5a+8
Step 2: Subtract 6/5a from both sides.
3/2a - 4 - 6/5 a = 6/5a + 8 - 6/5 a
3/10 a - 4= 8
Step 3: Add 4 to both sides.
3/10a -4 +4 = 8 + 4
3/10 a = 12
Step 4: Multiply both sides by 10/3
(10/3) * (3/10a) = (10/3) * (12)
a = 40
We know that a supplementary angle is equal to 180. Since we have one angle, we can easily find the other angle.
180 - 128.9 = 51.1
The other angle is equal to 51.1 degrees
Answer:
The correct answer is (1,-1).
Step-by-step explanation:
The given equations are,
brainlest plz
..... (1)
..... (2)
Use elimination method to solve the equations.
Multiply equation (1) by 5.
..... (3)
Subtract equation (3) from equation (2).
The y-coordinate is -1.
Put y=-1 in equation (1).
The x-coordinate is 1.
Therefore the intersection point is (1,-1).