Answer:
3
Step-by-step explanation:
To turn the word problem into an equation, when we read:
"I am thinking of a number" we write "x"
"when I double my number" we write "2x"
"and then subtract the result from 5" we write "5 - 2x"
"I get negative one" we write "-1 = 5 - 2x"
Now we solve for the number, which is x.
<em>Equation: </em>-1 = 5 - 2x
-1 = 5 - 2x
subtract 5 from both sides
-6 = -2x
divide both sides by -2
3 = x
<h3>
There we go! The number is </h3><h2>
3</h2>
Answer:
B
Step-by-step explanation:
When you look at the triangle look at the 3 vertices. Now look at you answers given and choose one that combines all 3 vertices. You don't want your answer to contain a letter/number that represents the length of a side.
So in this case you don't want M or Y in you answer.
Your answer has to be made up of A X andT.
The only answer that uses AXT is answer B.
Answer:
The probability is 
Step-by-step explanation:
From the question we are told that
The mean mileage of a tire is 
The standard deviation is 
The sample size is n = 209
Generally the standard error of mean is mathematically represented as
=> 
=> 
Generally the probability that the sample mean would differ from the population mean by less than 199 miles is mathematically represented as
=> 
=> 
=> 
=> 
From the z table the area under the normal curve to the left corresponding to 1.11 and -1.11 is
and
So
=>
Answer:
If a child took just one minute, distance is less than 0,8 km
Step-by-step explanation:
speed= 125 m/min = 0,125 km/min,
distance=0,8 km
time= 0,8 km / 0,125 km/min = 6,4 min.
