Answer:
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Step-by-step explanation:
8(8 + X) = 16
64 + X = 16
-64 -64
X = -48
Answer:
r = -16
Step-by-step explanation:
We will use "distributive" property and "adding like terms" concepts in solving for the unknown variable "r".
The distributive property is:
a(b+c) = ab + ac
So
2(10r-7) = 20r - 14
also
-2(1+10r) = -2 - 20r
So, our equation becomes:
Now we add like terms and move variables (r) to one side and numbers to another. Like terms mean:
3r + 5r = (3+5)r = 8r
So, we have:
So,
the value of r is -16
Length of rectangle
Rectangle 1) 23m
Rectangle 2) 14yd
Width of rectangle
Rectangle 1) 36m
Rectangle 2) 3.5yd
An expressions is an equations but without the equal sign ( = ) and without the solution ( the answer)
The formula To find the area of a rectangle is
A = base * height
or
A = length * width
Rectangle’s area written in as an expression
Rectangle 1) 23 * 36
Rectangle 2) 14 * 3.5
To find the area, you multiply the numbers
23 * 36 = 828
14 * 3.5 = 49
Rectangle’s area written as a number
Rectangle 1) 828m
Rectangle 2) 49yd
Find the total nails: 457 steel and 87 brass. Then remove the broken nails.
457 + 200 - 87
This can be rewritten as 457 - 87, then add 200.
