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aev [14]
4 years ago
13

Using technology, we determined that Mary’s investment account can be modeled by the function, M(x) = 4.96(2.18)x in thousands o

f dollars. What was Mary’s initial investment?
Mathematics
2 answers:
leonid [27]4 years ago
6 0
Well, her initial investment happened at day 0, namely x = 0, let's check,

\bf M(x)= 4.96(2.18)^x\qquad \boxed{x=0}\qquad M(0)= 4.96(2.18)^0
\\\\\\
M(0)= 4.96(1)\implies M(0)=4.96
Zina [86]4 years ago
5 0

Answer:

$4960.

Step-by-step explanation:

We have been given that Mary’s investment account can be modeled by the function, M(x)=4.96(2.18)^x in thousands of dollars. We are asked to find Mary's initial investment.

We can see that the given function is an exponential function where, initial value is 4.96 and growth factor is 2.18.  

Since the function given Mary's investment in thousands of dollars, so we need to multiply 4.96 by $1000.

\text{Mary's initial investment}=4.96\times \$1000

\text{Mary's initial investment}=\$4960

Therefore, Mary's initial investment was $4960.

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4. Isabelle takes the bus to work. The bus ride to work costs her $2.50 each time. She could buy a bus pass for a one-time fee o
iren [92.7K]

Answer:

6 times.

Exclamation:

You can do 15 divided by 2,50 to get you answer, when you do that you get 6.

(The upcoming and this sentence is pre-written and copy and pasted in every brainly question or comment I write or answer.) If this answer helped you please consider giving it brainliest. If my answer was wrong and you got marked wrong for it, I deeply apologize and hope you will forgive me, since everyone makes mistakes sometimes. If you need me to elaborate on my answer or give further explanation on it, please ask and I will do so. If you need to explain your reasoning on your work feel free to use my words- word for word- without crediting me, the answer was made for you anyways! Hope yall learn from my answer and it helps you in the future with assignments, quizzes, test’s, and more!

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8 0
3 years ago
Please help fast! I'm being timed. <br> What is the value of x?
Naddika [18.5K]

That's Intersecting Secants, and we get


EC × ED = EB × EA


(x+4)(x+4+1) = (x+1)(x+1+11)


(x+4)(x+5) = (x+1)(x+12)


x^2 + 9x + 20 = x^2 + 13x + 12


8 = 4 x


x = 2


Check: 3(14)=42 6(7)=42 good


Answer: 2




6 0
3 years ago
9x-y=5<br> 7x-6y=5<br> Solve the system by the substitution method
qwelly [4]
  9x - y = 5
7x - 6y = 5

Solve both equations for one variable. I'll solve for y.

9x - y = 5            Subtract 9x from both sides
      -y = -9x + 5   Divide both sides by -1
       y = 9x - 5

7x - 6y = 5   Subtract 7x from both sides
      -6y = -7x + 5   Divide both sides by -6
          y = \frac{7}{6}x - \frac{5}{6}

Since both equations equal y, you can set them equal to each other and solve for x.

9x - 5 =<span> \frac{7}{6}x - \frac{5}{6}   Multiply both sides by 6 to eliminate the fractions
54x - 30 = 7x - 5    Subtract 7x from both sides
47x - 30 = -5          Add 30 to both sides
       47x = 25          Divide both sides by 47
           x = </span>\frac{25}{47}

Now, plug that x-value into the x of either equation. I'll plug it into 9x - y = 5.

9x - y = 5   Plug in the x-value
9(<span>\frac{25}{47}) - y = 5   Multiply
</span>\frac{225}{47} - y = 5   Subtract <span>\frac{225}{47} from both sides
</span>-y = <span>0.21276595744 (I had to convert it to a decimal)   Divide both sides by -1
 y = -</span><span>0.21276595744

So, the answer to the system is (</span>0.53191489361, -<span>0.21276595744)</span>
8 0
4 years ago
Pleaseeeee help me with ma math
JulsSmile [24]
The answer's at the bottom. Let me know if you have any questions

4 0
4 years ago
Read 2 more answers
-2 5/22 as a decimal
AURORKA [14]
-2. 227273 thats it 

just divide 5/22 dividing
4 0
3 years ago
Read 2 more answers
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