Answer: perimeter: 40.79
Area: 84
Step-by-step explanation:
perimeter: (√3² + 6²) + (√1² + 6²) + 7 + 6 + 6 + 9 = 40.79
area: ((9 + 6) x 6) / 2 + ((6 + 7) x 6) / 2) = 45 + 39 = 84
Answer:
Janet has coins worth 252.5, 101, and 50.5.
Step-by-step explanation:
Let us call the three coins , and .
The first coin is 5 times another coin<em> (let's say </em>); therefore,
,
and the third coin is 2 times the value of another coin<em> (it's coin </em><em>):</em>
<em /><em>.</em>
The total worth of all coins is 404; therefore,
or
with the value of in hand, we find and :
and for
Thus, Janet has 3 coins worth 252.5, 101, and 50.5.
Answer:
A. x+138
Step-by-step explanation:
Deposit into her bank account is adding money to her bank account. So that means she's <u><em>adding $138 </em></u>to her bank. Which gives us <em>the expression of x+138.</em>
Answer:
Mean = 1.9
Standard deviation = 0.6
Step-by-step explanation:
The Mean is calculate by the formula:
⇒
Thus Mean to the nearest tenth is 1.9
Standard Deviation is the square root of sum of square of the distance of observation from the mean.
where, is mean of the distribution.
Putting all values in the formula, We get
Standard Deviation = 0.597 ≈ 0.6