I believe he would be 70 years old. 85 years minus 15 years equals 70.
Answer:
The correct option is;

Step-by-step explanation:
Here we have the formula for the confidence interval of the difference of two means where the population standard deviation is unknown based on the sample mean and sample standard deviation is given as follows;

Where:
= Mean of the first sample = 22 grams
= Mean of the second sample = 18 grams
s₁ = Sample standard deviation of the first sample = 3.2 grams
s₂ = Sample standard deviation of the second sample = 2.1 grams
n₁ = Sample size of the first sample = 100
n₂ = Sample size of the second sample = 100
= t value obtained from tables at 99% confidence level and 100 degrees of freedom = 2.626 = 2.63
Therefore, plugging in the values, we have;

Therefore, the correct option is
.
Answer:
$4.25
Step-by-step explanation:
<em><u>x </u></em><em><u>pens=</u></em><em><u>$</u></em><em><u>1</u></em><em><u>.</u></em><em><u>7</u></em><em><u>5</u></em>
<em>y </em><em>pens </em><em>=</em><em>$</em><em>2</em><em>.</em><em>5</em><em>0</em>
<em>Now,</em>
<em>in </em><em>the </em><em>ter</em><em>m</em><em>s </em><em>of </em><em>x </em><em>and </em><em>y </em><em>,</em>
<em>Alan </em><em>spend </em><em>altogether</em><em>=</em><em>1</em><em>.</em><em>7</em><em>5</em><em> </em><em>+</em><em>2</em><em>.</em><em>5</em><em>0</em>
<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em>$</em><em>4</em><em>.</em><em>2</em><em>5</em>
I think
This is your typical algebra question where you are looking for an unknown value given some information. The information can be set up as:
8 - x = 4*(x +3)
Distribute the 4:
8 - x = 4x + 12
Rearrange to get variables on one side:
8 - 12 = 4x + x
Simplifiy:
-4 = 5x
Isolate the variable:
-4/5 = x
Answer:
The least common mutible for 47,26, and 7 is "8554".