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wolverine [178]
3 years ago
12

One month, Diane worked 6 hours more than Elle. Together they worked 20 hours. How many hours did Diane work? How many hours did

Elle work?​
Mathematics
1 answer:
harina [27]3 years ago
7 0
D = E + 6
D + E = 20
Plug in the first one in the second one.
E + 6 + E = 20
2E + 6 = 20
2E = 14
E = 7
D = 13
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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

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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

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3 years ago
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(3, 7)

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8 0
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