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Aloiza [94]
3 years ago
6

Charlotte and Alexander each wrote an expression, but only Charlotte's expression is equivalent to 4g + 15. What could be Alexan

der's expression?
A. 4(g + 2) + 7
B. 5g - ( g - 15 )
C. 3(g + 5 ) - g
D. 8g - 4(g - 4 ) - 1
Mathematics
1 answer:
Kazeer [188]3 years ago
6 0

Answer:

C

Step-by-step explanation:

In this kind of problem the only thing you have to do is distribute all of the solution to see which one does not end up the same as the original.

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According to insurance records, a car with a certain protection system will be recovered 87% of the time. If 600 stolen cars are
White raven [17]

Answer:

The mean and standard deviation of the number of cars recovered after being stolen is 522 and 8.24 respectively.

Step-by-step explanation:

We are given that according to insurance records, a car with a certain protection system will be recovered 87% of the time.

Also, 600 stolen cars are randomly selected.

Let X = <u><em>Number of cars recovered after being stolen</em></u>

The above situation can be represented through binomial distribution;

P(X=r)=\binom{n}{r}\times p^{r} \times (1-p)^{n-r} ;x=01,2,3,......

where, n = number of trials = 600 cars

            r = number of success

            p = probability of success which in our question is the probability

                    that car with a certain protection system will be recovered,

                     i.e. p = 87%.

So, X ~ Binom(n = 600, p = 0.87)

Now, the mean of X, E(X) =  n \times p

                                          =  600 \times 0.87 = 522

Also, the standard deviation of X, S.D.(X)  =  \sqrt{n \times p \times (1-p)}

                                                                     =  \sqrt{600 \times 0.87 \times (1-0.87)}

                                                                     =  8.24

3 0
3 years ago
Graphing the Solution of an Inequality on the Number Line
katrin2010 [14]

Answer:

x < 4

Step-by-step explanation:

Step 1: Simplify both sides of the inequality.

Step 2: Subtract x from both sides.

Step 3: Subtract 6 from both sides.

Step 4: Multiply both sides by 4/(-1).

6 0
3 years ago
Miguel invests money in an account paying simple interest. He invests $170 and no money is added or removed from the investment.
stiv31 [10]

~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\dotfill & \$185.30\\ P=\textit{original amount deposited}\dotfill & \$170\\ r=rate\to r\%\to \frac{r}{100}\\ t=years\dotfill &1 \end{cases} \\\\\\ 185.30=170[1+(\frac{r}{100})(1)]\implies \cfrac{185.30}{170}=1+\cfrac{r}{100}\implies \cfrac{109}{100}=\cfrac{100+r}{100} \\\\\\ 109=100+r\implies \stackrel{\%}{9}=r

7 0
3 years ago
A basketball is thrown upwards. The height f(t), in feet, of the basketball at time t, in seconds, is given by the following fun
jeka57 [31]

Answer:

Well I think it is A because domain is the x values.

Step-by-step explanation:

So when you plug this in your calculator (mine is a ti-84 plus ce) you would hit graph. After it graphs it press Zoom, 0 to center it then press 2nd, trace which pulls up parabola menu's. Press 0 and find the left bound, right bound and then press enter which would give you x values of 2.9375 < t< 6

At the same time I don't know if this is right. I never really excelled at parabolas just trying to help.

7 0
3 years ago
Read 2 more answers
Show all your work!!! <br><br> B is already wrong (TRUST ME)
Blizzard [7]

Answer:

yes

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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