Answer: 7bb +19 ll ≥210
Step-by-step explanation:
Hi, to answer this question we have to write an inequality:
The product of the number of hours he works babysitting (bb) and the amount he earns per hour (7); plus The product of the number of hours he works lifeguarding (ll) and the amount he earns per hour 19; must be higher or equal to the amount he must earn this week (210)
Mathematically speaking:
7 bb + 19 ll ≥210
 
        
             
        
        
        
Answer:
Let t be the number of toys.
Since, the toy drive already has collected 300 toys 
⇒ t+ 300
Also, it is given that the goal of a toy drive is to donate more than 1000 toys. 
We get an inequality:
⇒
Solve an inequality:  

Subtract 300 from both sides we get

Simplify:
t > 700
Therefore, more than 700 toys does the toy drive need to meet its goal.
An inequality is;  ;  t > 700
 ;  t > 700
 
        
             
        
        
        
Answer: 1
Step-by-step explanation:
6+4×5-5²
=6+20-25
=1
 
        
                    
             
        
        
        
Answer:
The relative frequency of mammals in the survey is 30%.
Step-by-step explanation:
Relative frequency is the ratio of the occurrence of a singular event and the total number of outcome
Amphibians  Insects  Fish  Reptiles  Birds  Mammals 
12                 30          9          25        22        42
Relative frequency = 
Total number of wildlife animals  = 12+ 30 +9 +25+22+42 = 140
Now the relative frequency of mammals in the survey = 
the relative frequency of mammals in the survey = = 0.3
 = 0.3
Converting into percentage , we get
=
= 30 %
 
        
             
        
        
        
Using PEMDAS, 42 + 32 - 13 * 2 + 38 can be simplified as,
C. 42 + 32 + 12 = 86
You can check this by inserting the given expression (42 + 32 - 13 * 2 + 38) into a calculator, which should also give you the same answer of 86.