Answer:
B. -4.
Step-by-step explanation:
 
        
             
        
        
        
In 8, 9, 10, all the triangles are similar, meaning corresponding sides have the same ratio.
8. hypotenuse / (short side) = 25/x = x/9
  x² = 25*9 = 5²×3²
  x = √(5²×3²) = 5*3 = 15
9. (long side) / (short side) = x/7 = 9/x
  x² = 7*9
  x = √(9*7) = 3√7
10. (short side) / (long side) = x/48 = 48/64
  x = 48²/64 = 36
        
             
        
        
        
Let
x--------> the amount you have left to spend
y--------> the cost of a shirt you want
z------> the amount of the gift card
we know that
 --------> equation
 --------> equation 
 --------> equation
 --------> equation 
 --------> equation
 --------> equation 
Substitute the equation  and equation
 and equation ![3 in the equation [tex] 1](https://tex.z-dn.net/?f=%203%20in%20the%20equation%20%5Btex%5D%201%20) [/tex]
 [/tex]

 
 
therefore
<u>the answer is the option</u>
x+15 is less than or equal to 60
 
        
                    
             
        
        
        
Answer:
1,-3,-5
Step-by-step explanation:
Given:
 f(x)=x^3+7x^2+7x-15
Finding all the possible rational zeros of f(x)
p= ±1,±3,±5,±15 (factors of coefficient of last term)
q=±1(factors of coefficient of leading term)
p/q=±1,±3,±5,±15
Now finding the rational zeros using rational root theorem
f(p/q)
f(1)=1+7+7-15
    =0
f(-1)= -1 +7-7-15
      = -16
f(3)=27+7(9)+21-15
     =96
f(-3)= (-3)^3+7(-3)^2+7(-3)-15
      = 0
f(5)=5^3+7(5)^2+7(5)-15
     =320
f(-5)=(-5)^3+7(-5)^2+7(-5)-15
       =0    
f(15)=(15)^3+7(15)^2+7(15)-15
      =5040 
f(-15)=(-15)^3+7(-15)^2+7(-15)-15
       =-1920
Hence the rational roots are 1,-3,-5 !