10m/s
32m/s
83m/s 
None of these
Answer :
C
Solution :
At any instant x2+y2=52
Differentiating w.r.t. time 2xxdt+2ydydt=0
Here dxdt=2,dydt=u⇒u=83m/s
 
        
             
        
        
        
The equivalent expression of -14 - 6 is -14 - (+6)
<h3>What are 
equivalent expression?</h3>
Equivalent expressions are expressions that have the same value when evaluated
<h3>How to determine the equivalent expression?</h3>
The expression is given as:
-14 - 6
Put the terms of the expression in brackets
-14 - (6)
Rewrite 6 as +6
-14 - (+6)
Hence, the equivalent expression of -14 - 6 is -14 - (+6)
Read more about equivalent expression at
brainly.com/question/2972832
#SPJ1
 
        
             
        
        
        
Answer:
x=30
Step-by-step explanation:
it is an equilateral triangle, so all angles are the same. each angle is 60 degrees. 60/2 is 30, so 30 degrees is the answer.
 
        
             
        
        
        
Answer:
A = 450 cm²
Step-by-step explanation:
Since the right triangle is isosceles then the 2 logs are congruent , both 30 cm and at right angles to each other.
The area (A ) of the triangle is calculated as
A =  bh ( b is the base and h the perpendicular height )
 bh ( b is the base and h the perpendicular height )
Here b = h = 30 , then
A =  × 30 × 30 =
 × 30 × 30 =  × 900 = 450 cm²
 × 900 = 450 cm²
 
        
             
        
        
        
Answer: $5
Step-by-step explanation: 4 children divided by 20 equals 5