Answer:
you need to read 11 or more books to pass your goal
Step-by-step explanation:
 
        
             
        
        
        
If she rides her bike 18 km per hour 
then it will take 4 hours to travel 72 km (72÷18)
the answer is 4
        
             
        
        
        
Answer:
2 2/5
Step-by-step explanation:
Dividing two fractions is the same as multiplying the first fraction by the reciprocal of the second fraction. First convert the first into the improper fraction -8/5. Now because when dividing fractions you keep the first on, change to multiplication and flip the second equation you have 
-8/5 x -3/2=?
Now you just multiply across as you would and normal time multiplying fractions. Remember a negative divided by a negative is a positive! And not after you keep, change, flip and multiply you are left with 24/10. Which is equal to 12/5 but you wanted a mixed number so we convert it into 2 2/5
 
        
             
        
        
        
We know that
a) find <span>the ratio of the perimeters 
</span><span>
the ratio of the perimeters is equal to the scale factor
</span>scale factor=26/6-----> 13/3
the answer Part a) is
the ratio of the perimeters is 13/3
b) find <span>the ratio of the areas of the larger figure to the smaller figure
we know that
area larger figure=[scale factor]</span>²*area smaller figure
scale factor²=area larger figure/area smaller figure
the ratio of the areas of the larger figure to the smaller figure is equal to scale factor squared
scale factor²=(13/3)²----> 169/9
the answer Part b) is
169/9
the complete answer is
13/3 and 169/9
        
             
        
        
        
Answer:
Therefore the value of x = 10 units
Step-by-step explanation:
Let label the Triangles first,
Δ ABC a right triangle at ∠ A =90°
Δ ADB andΔ ADC a right triangle at ∠ D =90°
Such that
AD = x
BD = 50
CD = 2
∴ BC = BD + DC = 50 + 2 = 52
To Find:
x = ?
Solution:
In right triangle  By Pythagoras Theorem,

In right triangle Δ ADB andΔ ADC  By Pythagoras Theorem we will have,
AB² =  BD² + AD²
AB² = 50² + x²            ..................equation ( 1 )
and
AC² = DC² + AD²
AC² = 2² + x²             ...................equation ( 2 )
Now in right triangle Δ ABC,
BC² = AB² + AC²
Equating equation  (1 ) and ( 2 ) and the given value we get
52² = 50² + x² + 2² + x²
∴ 2x² = 2704 - 2504
∴ 2x² =200
∴ 
 Therefore the value of x = 10 units