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erica [24]
3 years ago
7

Find the first, fourth, and eighth terms of the sequence. A(n)=-2 × 2^N-1

Mathematics
1 answer:
11111nata11111 [884]3 years ago
7 0
<span><span>an</span>=<span><span>(<span>−<span>2x</span></span>)</span><span>(<span>2<span>−1</span></span>)</span></span></span>Step 1: Divide both sides by n.<span><span><span>an</span>n</span>=<span><span>−x</span>n</span></span><span>a=<span><span>−x</span>n</span></span>Answer:<span>a=<span><span>−x</span><span>n</span></span></span>
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Okay I know I suck at math and I really don't understand math that well so can you help me on this??? Thank you!
Alja [10]
W - width
l - length
p - perimeter

The perimeter is 72 cm (p=72).
The length is twice the width (l=2w).
The formula for perimeter is 2w+2l=P.

p=72 \\&#10;l=2w \\ \\&#10;2w+2l=p \\&#10;2w+2 \cdot 2w=72 \\&#10;2w+4w=72 \\&#10;6w=72 \\&#10;w=12 \\ \\&#10;l=2w=2 \cdot 12 =24

Check the answer:
2 \cdot 12 + 2 \cdot 24 \stackrel{?}{=} 72 \\&#10;24+48 \stackrel{?}{=} 72 \\&#10;72 \stackrel{?}{=} 72 \\ \hbox{true}

The length of the photo is 24 cm, the width of the photo is 12 cm.
8 0
3 years ago
What is 70% of 92?<br> Please answer fast I need it done by tomorrow
mina [271]
The answer is 64.4 because you multiply 92 times 0.7 and get 64.4
8 0
3 years ago
1. what would the effect have been on the calculated formula weight ([9] above) of your unknown as compared to the true formula
kramer

If the solution is blue-green, this indicates that some copper is still present in the solution and that not all of it has precipitated. Expect it to be too low because you will have less mass.

With very few exceptions, all copper(I) (cuprous) compounds are diamagnetic and colorless. Cu2O, Cu2Cl2, and cuprous sulfide are a few of the significant commercial compounds of copper(I) (Cu2S).

The molar mass of the element copper is determined by looking at its average atomic mass, which is 63.55 AMU on the periodic table. Since it is also our molar mass, we will now put it in a different unit: grams over moles (63.55 gmol). That is copper's molar mass.

If the solution is blue-green, there is still copper in the solution and not all of it has precipitated. Because you will have less bulk, anticipate it to be too low.

To know more about copper, refer to this link:

brainly.com/question/1543891

#SPJ4

3 0
10 months ago
Solve the system of equations.
sveta [45]

Answer: B. (-1,3) and (2,6)

Step-by-step explanation:

I just found the points they met on the graph

3 0
2 years ago
Read 2 more answers
620 + 107 round estimate the sum
Westkost [7]
Okay. 

 620 would be rounded estimate to 600

& 

107 would be rounded estimate to 100 


6 0
3 years ago
Read 2 more answers
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