Find the cross product and determine whether the proportion is true or false.
= 
A. 100 ? 
; false
B. 15 = 15; true
C. 
? 140; false
D. 35 = 35; true
Answer: D
Mathematics
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Provide an appropriate response.A fuel tank that holds 90 liters (L) of fuel is 
full. How many liters of fuel are in the tank?
A. 60 L
B. 
L
C. 135 L
D. none of the above
Mathematics
Rewrite each sum using the commutative property of addition.10 + 
=
A. 24 + 
B. 
+ 
C. 24 + 10
D. 
+ 10
Mathematics
Find the focus and directrix of the parabola with the given equation.3y2 = -4x
A. Focus: 
, directrix: y = 
B. Focus: 
, directrix: x = 
C. Focus: 
, directrix: y = 
D. Focus: 
, directrix: x = - 
Mathematics
Solve the problem.One number is 3 less than a second number. Twice the second number is 18 less than 5 times the first. Find the two numbers.
A. -11 and -8 B. 8 and 11 C. 7 and 10 D. 9 and 12
Mathematics