Answer:60 %
Step-by-step explanation:
<h3>if we set up an proportion, 

 =

 the answer is 60. </h3><h3>100x12=1200</h3><h3>1200 divded by 20 =60</h3>
 
        
             
        
        
        
You have to use the order of operations when evaluating algebraic expressions. The m<span>nemonic device is PEMDAS, which stands for Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. So the first thing is to solve what's in the parentheses.</span>
        
                    
             
        
        
        
Answer: 
The first question would likely be y=10. 
The second question would likely be x=20.
        
             
        
        
        
Answer:
option a)
 0.286
Step-by-step explanation:
Given that,
 number of red pens in cup = 5
 number of black pens in cup = 10
 number of pen randomly selected = 3
There are 5 red pens and 10 black pens. So there are 5 + 10 = 15 pens in all.
probability of having all red pens = (5/15 x 4/14 x 3/13)
                                                        = 2/91
probability of having all black pens = (10/15 x 9/14 x 8/13)
                                                            = 24/91 
probability that all pen are of same colour = 24/91 + 2/91
                                                                       =  2/7
                                                                       ≈ 0.286
 
        
             
        
        
        
Answer: 19/50
Step-by-step explanation: To write a percent as a fraction in lowest terms, first remember that a percent is a ratio that compares a number to 100. In this case, 38% can be written as the ratio 38 to 100 or 38/100. Notice however that 38/100 is not in lowest terms so we need to divide the numerator and denominator by the greatest common factor of 38 and 100 which is 2.
38 ÷ 2 = 19
100 ÷ 2 = 50
<em>Therefore, 38% can be written as the fraction 19/50 which is in lowest terms.</em>