Answer:
40×40=1600cm²
Step-by-step explanation:
times the length and width which for a square are the same.
 
        
             
        
        
        
Answer:
<h2>13</h2>
Step-by-step explanation:
      3z + 5 = 4z - 8 
⇌  5 + 8 = 4z - 3z 
⇌  13 = z
 
        
                    
             
        
        
        
Answer:
paper left = 168.56 units²
Step-by-step explanation:
first, figure the area of the square:
area of square = 28x28 = 784 units²
second, figure the area of the circle:
radius = 1/2of 28 = 14
area of circle = Pi x Radius² = (3.14)(14)² = 615.44 units²
subtract area of circle from area of square:
784 - 615.44 = 168.56 units²
 
        
             
        
        
        
Answer: 1.23×10¹⁶
Step-by-step explanation:
For this problem, we want to use order of operations to solve.
Parenthesis
Exponent
Multiply
Divide
Add
Subtract
Let's first solve the parenthesis.
 [add denominator]
                [add denominator]
 [cross multiply]
                                  [cross multiply]
 [divide]
                                       [divide]
 [exponent]
                                     [exponent]
1.23×10¹⁶
The ending result is way too large. Therefore, we use scientific notation and get 1.23×10¹⁶.
 
        
             
        
        
        
0 = 4x²<span> + 2x – 1
this equation is already ordered by degree, so it's in the correct form. the standard form of a parabola is like so: 0 = A</span>x² + Bx - C
that's exactly how you plug values into the quadratic formula. the coefficient for your squared value, A, is 4. take the coefficients from your other numbers as well.
a = 4
b = 2
c = -1