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sweet [91]
3 years ago
6

Give an example of why division is not commutative.

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
4 0
Example:

4 ÷ 2 = 2 but 2 ÷ 4 = 0.5

In general a ÷ b ≠ b ÷ a, then division is not commutative
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The answer is c or A
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The fox population in a certain region has a relative growth rate of 5 percent per year. It is estimated that
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Use the function from part a to estimate the fox population in the year 2006.round to the nearest fox
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3 years ago
Jake forgot to replace the cap on a bottle of deodorant. The deodorant began to evaporate at the rate of 12% per day. If the ori
belka [17]

Answer:

graph of function f of x equals 30 multiplied by 0.88 to the power of x

Step-by-step explanation:

The deodorant is begun to evaporate in other words, it is losing mass so the rate of 12% is a decay rate.  In the exponential decay, the graph of the function goes according to the formula:

y=a(1-r)^x

Where a is the initial amount (a=30), r is the rate of decay (r=0.12) and x the times intervals, in this case, measured in days. Substituting the values in the formula:

y=30(1-0.12)^x\\y=30(0.88)^x

Which corresponds with the "graph of function f of x equals 30 multiplied by 0.88 to the power of x".

3 0
3 years ago
4x + 2(2x - 3) = 8(x - 1)
Semenov [28]

Answer:

No solution

Step-by-step explanation:

4x + 2(2x - 3) = 8(x - 1)

4x + 4x - 6 = 8x - 8

8x - 6 = 8x - 8

0 = -2

There is no value of x makes the equation true.

3 0
3 years ago
A vending machine operator has determined that the number of candy bars sold per week by a certain machine is a random variable
docker41 [41]

Answer:

The answer is below

Step-by-step explanation:

Let Y represent the profit per day, and x represent the number of bar sold per day. Hence:

Y = 0.25x - 2

a) The mean is given as:

\mu_y=E(Y)=E(0.25X-2) = 0.25E(X)-2\\\\But\ E(X)=mean\ of\ machine=125. Hence:\\\\E(Y)=0.25(125)-2=29.25\\\\E(Y)=\$29.25

b) The standard deviation of y is:

\sigma_y=var(0.25X-2)\\\\\sigma_y=0.25\sigma(X)\\\\but\ \sigma_X=7,hence:\\\\\sigma_y=0.25(7)=1.75\\\\\sigma_y=\$1.75

6 0
3 years ago
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