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Marina CMI [18]
3 years ago
15

Lizzy has a total of x dollars in her checking account. She makes a deposit of b dollars cash and

Mathematics
1 answer:
Natalka [10]3 years ago
5 0

Answer:

x+b+2 * c - d

I believe that's the expression

Step-by-step explanation:

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Find the sum of the first 8 terms of the series. 1/2 + 1 + 2 + 4
Roman55 [17]

\bf \cfrac{1}{2}~~,~~\stackrel{2\cdot \frac{1}{2}}{1}~~,~~\stackrel{2\cdot 1}{2}~~,~~\stackrel{2\cdot 2}{4}~~,...

so as you can see the common ratio is 2, and the first term is 1/2,

\bf \qquad \qquad \textit{sum of a finite geometric sequence} \\\\ S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad  \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ r=\textit{common ratio}\\ ----------\\ r=2\\ a_1=\frac{1}{2}\\ n=8 \end{cases} \\\\\\ S_8=\cfrac{1}{2}\left( \cfrac{1-2^8}{1-2} \right)\implies S_8=\cfrac{1}{2}\left( \cfrac{-255}{-1} \right)\implies S_8=\cfrac{255}{2}

4 0
4 years ago
Read 2 more answers
Which exponential expression is equal to 2−5·28
gizmo_the_mogwai [7]

Answer:

Impossible

Step-by-step explanation:

Solve the answer 2-5*28 = -138

This would have no answer since an exponential expression can't equal an negative unless it's a negative answer, but in this case, there is no answer that would get you -138.

3 0
3 years ago
the number of students enrolled in school increase by 12% from last year to this year. The enrollment this year is 13,640. What
algol13
Use a calculator. I would walk you through it, but it should be simple.
8 0
3 years ago
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU B
rosijanka [135]

Answer:

33.51

Step-by-step explanation:

V=4 3πr3=4 3·π·23≈33.51032

3 0
3 years ago
What is the gradient of the graph shown
devlian [24]

The gradient of the graph is 2.

Solution:

Let the points on the graph are (-2, 0) and (0, 4).

Here x_1=-2, y_1=0, x_2=0, y_2=4.

Gradient of the graph:

$\text{Gradient }= \frac{y_2-y_1}{x_2-x_1}

               $= \frac{4-0}{0-(-2)}

               $= \frac{4-0}{0+2}

               $= \frac{4}{2}

Cancel the common terms, we get

Gradient = 2

The gradient of the graph is 2.

5 0
3 years ago
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