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Elena L [17]
3 years ago
12

Need geometry help please

Mathematics
1 answer:
Tatiana [17]3 years ago
8 0

Answer:

I think C

Step-by-step explanation:

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What is the value of y in the sequence below<br> 2, У, 18,-54, 162
Maslowich

Answer:

<em>y=-6</em>

Step-by-step explanation:

<em>Geometric Sequences</em>

Any given sequence is said to be geometric if each term a_n can be obtained as the previous term a_{n-1} by a constant value called the common ratio.

a_n=a_{n-1}.r

or equivalently

a_n=a_1.r^{n-1}

Looking closely at the sequence 2, y, 18,-54, 162 we can try to find out if it's a geometric sequence or not. We compute the possible common ratios

\displaystyle \frac{162}{-54},\ \frac{-54}{18} and we see they both result -3. If we use r=-3 and try to find the second term (y), then

y=2*(-3)=-6

Now we compute the third term: (-6)(-3)=18

Since we got the third term as given in the original sequence.

So y=-6

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3 years ago
Jose put$1500 into a savings account. He earns 3% interest every year. How much simple interest will he earn at the end of 3 yea
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$3142

Step-by-step explanation:

8 0
3 years ago
Homework help!!
weqwewe [10]

Answer:

124 people

Step-by-step explanation:

7 0
3 years ago
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Kelly goes to the store and buys 9 boxes of cookies. The cost of each box is represented with the letter c. Which expression cou
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9c because you don't know how much money Kelly actually spent so instead of doing 9 x the price of each box, you replace it with c, so it's 9c

Step-by-step explanation:

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3 years ago
How many days would it take a construction loan of $548,048 to earn$50,000 exact interest at 9% interest rate?
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\bf \qquad \textit{Simple Interest Earned}\\\\&#10;I = Prt\qquad &#10;\begin{cases}&#10;I=\textit{interest earned}\to &50000\\&#10;P=\textit{original amount deposited}\to& \$548048\\&#10;r=rate\to 9\%\to \frac{9}{100}\to &0.09\\&#10;t=years&#10;\end{cases}&#10;\\\\\\&#10;50000=548048\cdot 0.09t\implies \cfrac{50000}{0.09(548048)}=t\implies 1.014\approx t
8 0
3 years ago
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