Answer:
Step-by-step explanation:
In a rectangle,  diagonals are equal and bisect each other
BE  =   AE
6x - 5 = 2x +  7 
6x - 2x - 5 = 7
        4x - 5 = 7
              4x = 7 + 5
              4x = 12
                x = 12/4
                x = 3
AE = 2x + 7 
      = 2*3 + 7
     = 6 + 7
AE =  13 
AC = 13 + 13 
AC = 26
m∠EBC = 50
In rectangle, each angle is 90
m∠ABE + m∠EBC = 90
m∠ABE + 50 = 90
           m∠ABE = 90 - 50
           m∠ABE = 40
In rectangle, AB // DC and DB transversal
m∠ECD = m∠ABE   { alternate interior angles}
m∠ECD = 40
 
        
             
        
        
        
Answer:
 
 
Step-by-step explanation:
 ÷
 ÷  
 
The reciprocal of   is 3, so finding the reciprocal will replace the division sign with a multiplication sign.
 is 3, so finding the reciprocal will replace the division sign with a multiplication sign.
 =  x 3
 x 3 
 =  or 1
 or 1 or 1.5
 or 1.5
 
        
             
        
        
        
Cot^2x - cot^2x cos^2x
= cot^2x - {(cot^2x)(cos^2x)}
= cot^2x { 1 - cos^2x }
= cot^2x { sin^2x }
= (cos^2x/sin^2x) { sin^2x }
= cos^2x
        
             
        
        
        
2=8x-2/9
add 2/9 to both sides
2 and 2/9=8x
2=18/9
2 and 2/9=18/9+2/9=20/9
20/9=8x
multiply both sides by 9
20=72x
divide boht isdes by 72
20/72=x=5/18
        
             
        
        
        
Answer:
15 answers
Step-by-step explanation:
To solve this question we need to set up an equation.
Let's name the number of incorrect answers x.
<u>We can set up an equation that's essentially:</u>
(Points for correct answer)*(number of correct answers)+(points for incorrect answer)*(number of incorrect answers)=final score
When we plug in our numbers and variables it looks like this:
5(3)+(-2x)=-15
Simplify
15-2x=-15
Subtract 15 from both sides
-2x=-30
Divide both sides by -2
x=15
This means Smitha attempted 15 wrong answers, and that there were 18 questions in total.