Angle 2=3, so angle 1=4 because angles ABC & BCD equal 90°. When you add together the angles of a triangle you get 180 and if you could put angle 1 and 4 together it would look like an upward version.
That is the best way I could describe it. Hope that helps.
Hi!
Tip #1: To multiply polynomials, consider the variables separate from the numbers.
So we are multiplying 2xyz * -4x²yz
Let's start by multiplying the variables.
xyz * x²yz
Tip #2: The exponents tell you how many of each variable there are. When multiplying variables, add the exponents. When a variable does not seem to have an exponent, that means there is an invisible exponent of 1! (x =
)
xyz * x²yz = (x + x²)(y + y)(z + z) = x³y²z²
Now multiply the numbers! (just like normal)
2 * -4 = -8
Now combine the numbers with the variables once again.
-8x³y²z²
The answer for 2xyz * -4x²yz is -8x³y²z²
Hope this helps! :)
Follow PEMDAS
multiplication is first (in this case) and then addition
2 x 8 = 16
16 + 2 = 18
18 is your answer
hope this helps
Step-by-step explanation:
Let the two numbers be x and y
x+y =5 ---1
x-y =-3 ---2
Rearrange equation 1
x =5-y
Substitute x in the second equation
(5-y)-y =-3
5-y-y =-3
5-2y =-3
Collect like terms
5+3 = 2y
8 = 2y
Divide both sides by the coefficient of y (2)
8/2 = 2y/2
4 = y
y= 4
Substitute y in equation 1
x+4 =5
Subtract 4 from both sides
x+4-4 = 5-4
x+0 = 1
x= 1
The two numbers are 1 and 4
well, you already know how to convert from mixed to improper, so let's simply do the division.
