Natalie visits a grocery store to buy tomatoes. The cost of the tomatoes is

Mathematics

2 answers:

Helga [31]3 years ago

6 0

Well... 26 plus 4 is 30 dollars presumably.

Mekhanik [1.2K]3 years ago

3 0

Answer:

$22

Step-by-step explanation:

26-4 = 22

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Find d for the arithmetic series with S17=-170 and a1=2

Irina18 [472]

So, we know the sum of the first 17 terms is -170, thus S₁₇ = -170, and we also know the first term is 2, well

$\bf \textit{ sum of a finite arithmetic sequence}\\\\
S_n=\cfrac{n(a_1+a_n)}{2}\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
----------\\
n=17\\
S_{17}=-170\\
a_1=2
\end{cases}
\\\\\\
-170=\cfrac{17(2+a_{17})}{2}\implies \cfrac{-170}{17}=\cfrac{(2+a_{17})}{2}
\\\\\\
-10=\cfrac{(2+a_{17})}{2}\implies -20=2+a_{17}\implies -22=a_{17}$

well, since the 17th term is that much, let's check what "d" is then anyway,

$\bf n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
n=17\\
a_{17}=-22\\
a_1=2
\end{cases}
\\\\\\
-22=2+(17-1)d\implies -22=2+16d\implies -24=16d
\\\\\\
\cfrac{-24}{16}=d\implies -\cfrac{3}{2}=d$

6 0

3 years ago

Multiplying fraction 5 5/9×2 16/25

Angelina_Jolie [31]

You can convert them to decimals and multiply. Remember when using decimals, it is over 10 or 100 <span />

3 0

3 years ago

Read 2 more answers

Write the equation for:

xenn [34]

Answer:

$\frac{1}{2} x +x = 2 (x-4)$