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vladimir2022 [97]
3 years ago
11

HELPP ME s + 3 Five6= 6 17

Mathematics
2 answers:
seraphim [82]3 years ago
7 0

Answer:261

Step-by-step explanation:

Oduvanchick [21]3 years ago
6 0

Answer:The crystal structures of five 6-mercaptopurine derivatives, viz. 2-[(9-acetyl-9H-purin-6-yl)sulfan­yl]-1-(3-meth­oxy­phen­yl)ethan-1-one (1), C16H14N4O3S, 2-[(9-acetyl-9H-purin-6-yl)sulfan­yl]-1-(4-meth­oxy­phen­yl)ethan-1-one (2), C16H14N4O3S, 2-[(9-acetyl-9H-purin-6-yl)sulfan­yl]-1-(4-chloro­phen­yl)ethan-1-one (3), C15H11ClN4O2S, 2-[(9-acetyl-9H-purin-6-yl)sulfan­yl]-1-(4-bromo­phen­yl)ethan-1-one (4), C15H11BrN4O2S, and 1-(3-meth­oxy­phen­yl)-2-[(9H-purin-6-yl)sulfan­yl]ethan-1-one (5), C14H12N4O2S. Compounds (2), (3) and (4) are isomorphous and accordingly their mol­ecular and supra­molecular structures are similar. An analysis of the dihedral angles between the purine and exocyclic phenyl rings show that the mol­ecules of (1) and (5) are essentially planar but that in the case of the three isomorphous compounds (2), (3) and (4), these rings are twisted by a dihedral angle of approximately 38°. With the exception of (1) all mol­ecules are linked by weak C—H⋯O hydrogen bonds in their crystals. There is π–π stacking in all compounds. A Cambridge Structural Database search revealed the existence of 11 deposited compounds containing the 1-phenyl-2-sulfanyl­ethanone scaffold; of these, only eight have a cyclic ring as substituent, the majority of these being heterocycles.

Keywords: crystal structure, mercaptopurines, supra­molecular structure

Go to:

Chemical context  

Purines, purine nucleosides and their analogs, are nitro­gen-containing heterocycles ubiquitous in nature and present in biological systems like man, plants and marine organisms (Legraverend, 2008 ▸). These types of heterocycles take part of the core structure of guanine and adenine in nucleic acids (DNA and RNA) being involved in diverse in vivo catabolic and anabolic metabolic pathways.

6-Mercaptopurine is a water insoluble purine analogue, which attracted attention due to its anti­tumor and immunosuppressive properties. The drug is used, among others, in the treatment of rheumathologic disorders, cancer and prevent

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Solve for x and y.<br> y = 2/3x - 2<br> y = -x + 3
sesenic [268]

Answer:

1. x= 3y+6/2

y=2/3x-2

2.x=−y+3

y=−x+3

Step-by-step explanation:

1. Let's solve for x.

y=2/3x-2

Step 1: Flip the equation.

2/3x-2=y

Step 2: Add 2 to both sides.

2/3x-2+2=y+2

2/3x=y+2

Step 3: Divide both sides by 2/3.

2/3x/2/3=y+2/2/3

x= 3y+6/2

Let's solve for y.

y=2/3x-2

2. Let's solve for x.

y=−x+3

Step 1: Flip the equation.

−x+3=y

Step 2: Add -3 to both sides.

−x+3+−3=y+−3

−x=y−3

Step 3: Divide both sides by -1.

-x/-1=y-3/-1

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here are two graphs if you need a better explanation

HOPE THIS HELPS

5 0
3 years ago
A.Mary wrote all the integers from 1 to 19. How many numbers did she write?
pentagon [3]

Answer:

A. She wrote 19 numbers

B. She wrote 12 numbers

C. She wrote 29 digits

Step-by-step explanation:

To find haw many numbers from x to y subtract x and y and then add 1

  • Ex: There are 6 numbers from 1 to 6 because (6 - 1) + 1 = 6 (1, 2, 3, 4, 5, 6)

To find how many numbers between x and y subtract x and y then subtract 1

  • Ex: There are 4 numbers between 1 and 6 because (6 - 1) - 1 = 4 (2, 3, 4, 5)

The numbers from 1 to 9 have one digit and from 10 to 99 have two digits

A.

∵ Mary wrote all the integers from 1 to 19

∵ (19 - 1) + 1 = 19

∴ She wrote 19 numbers

B.

∵ Rena wrote all the integers from 1 to 12

∵ (12 - 1) + 1 = 12

∴ She wrote 12 numbers

C.

∵ Mary wrote all the integers from 1 to 19

∵ From 1 to 9 the numbers have one digit

∵ There are 9 numbers from 1 to 9 because (9 - 1) + 1 = 9

∴ The number of digits from 1 to 9 = 9 × 1 = 9 digits

∵ There are 10 numbers from 10 to 19 because (19 - 10) + 1 = 10

∵ From 10 to 19 each number has 2 digits

∴ The number of digits from 10 to 19 = 10 × 2 = 20 digits

∴ The number of digits from 1 to 19 = 9 + 20 = 29 digits

∴ She wrote 29 digits

4 0
3 years ago
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