Answer:
The unknown number is -6
Step-by-step explanation:
Let's start by writing the sentence in mathematical terms:
Since we don't know what that "number" is, we replace it with the letter "
". Then, <em>the quotient of that unknown number and three</em> can now be written as: 
"<em>Five less than the quotient of a number by three</em>", can then be written as the difference (where we are subtracting 5 from that quotient): 
The last part of the sentence tells us that the expression we just wrote in mathematical form "<em>is -7</em>." This in mathematical terms indicates "equals -7."
Therefore, we now have a mathematical equation (there is an equal sign in the expression) and we try to solve for the unknown number "" in it:
We do such by isolating the x on one side of the equal sign. This process involves: first add 5 on both sides of the equation, and second:multiply both sides of the equation by 3 to get rid of the denominator under the unknown:
Answer:
The anwser is B forsho
Step-by-step explanation:
'Direct measurement' refers to measuring exactly the thing that you are looking to measure, while 'indirect measurement' means that you're measuring something by measuring something else. For example of direct measurement is weight, distance, and so on.
Answer:
<h3>The answer is 70cm²</h3>
Step-by-step explanation:
Area of a parallelogram = base × height
From the question
base = 14 cm
height = 5 cm
Substituting the values into the above formula we have
Area = 14 cm × 5 cm
<h3>Area = 70cm²</h3>
Hope this helps you
Answer:
The 99% confidence interval for the average length of time all car owners plan to keep their cars is between 3.85 years and 10.55 years.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
So it is z with a pvalue of 
, so 
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 7.2 - 3.35 = 3.85 years
The upper end of the interval is the sample mean added to M. So it is 7.2 + 3.35 = 10.55 years
The 99% confidence interval for the average length of time all car owners plan to keep their cars is between 3.85 years and 10.55 years.
