Answer:  A good estimation would be about 150.
Step-by-step explanation:
To estimate we can round instead of using exact numbers.
First day he saw about 30 birds and twice as many squirrels, meaning about 60 squirrels.  This is about 90 total when added together.
Second day he saw 20 birds and about 40 squirrels so about 60 when added together.
Add day one and day two totals for...
90+60=150
 
        
             
        
        
        
Answer:
There are 40 problems on the test
Step-by-step explanation:
Let p = the number of problems on the test
The number of problems on the test times the percent correct is the number correct
p * 85% = 34
p * .85 = 34
Divide each side by .85
p * .85/.85 = 34/.85
p = 40
There are 40 problems on the test
 
        
             
        
        
        
Answer:
<u>2 1/6x +10</u>
Step-by-step explanation:
All you need to do is combine like terms.
3/2x+<u>4</u>+2/3x+<u>6</u>
3/2x+<u>10</u>+2/3x
<u>3/2x + 2/3x</u>= <u>2 1/6x</u>
<u>2 1/6x+10</u>
 
        
             
        
        
        
X + x + 30 = 510
2x = 480
x = 240  
there were 240 women and 270 men.
        
             
        
        
        
x will represent the first unknow number 
6x will represent the second number
the two numbers together will equal 21
6x + x = 21  combine like terms
7x =21  divide both sides by 7
x =3
Hope that helps.
brainliest is always appreciated.