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eimsori [14]
2 years ago
7

3x - 7 = 3x + 9; x = Please can someone help me and show me the answers step by steps

Mathematics
2 answers:
anyanavicka [17]2 years ago
5 0

Answer:

i think probably x∉∅

Step-by-step explanation:

3x-7 = 3x+9

-7 = 9

so x∉∅

Step2247 [10]2 years ago
3 0

Answer:

0 = 16 or No Solution

Step-by-step explanation:

1) Add  7   to both sides of the equation

3x - 7 + 7 = 3x + 9 + 7

2) Simplify

A. Add the numbers

3x = 3x + 9 + 7

B. Add the numbers

3x = 3x + 16

3) Subtract 3x  from both sides of the equation

3x - 3x = 3x + 16 - 3x

4) Simplify

A. Combine like terms

0 = 3x + 16 - 3x

B. Combine like terms

0 = 16

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2.120805

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Between which two whole numbers does 89 lie a. 4 and 5 b. 7 and 8 c. 8 and 9 d. 9 and 10
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3 years ago
David ate 1/4 of a chocolate pie and peter ate 2/5.What fraction of the pie still remains?
spin [16.1K]

Answer:

Step-by-step explanation:

Pie eaten by David and Peter = (1/4) + (2/5)

                                                  = \frac{1*5}{4*5}+\frac{2*4}{5*4}\\\\=\frac{5}{20}+\frac{4}{20}\\\\=\frac{9}{20}

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7 0
2 years ago
Dr. Hawk works in an allergy clinic, and his patients have the following allergies: 71 are allergic to dairy products, 98 are al
sweet [91]

Answer: a) 65.75% and b) 13.7%

Step-by-step explanation:

Since we have given that

Number of people who are allergic to dairy products = n(A) = 71

Number of people who are allergic to pollen = n(B) = 98

Number of people who are allergic to animal dander = n(C) = 96

Number of people who are allergic to all n(A∩B∩C) = 33

Number of people who are allergic only to pollen = 30

Number of people who are allergic only to dairy product = 10

Number of people who allergic to dairy products and pollen n(A∩B)= 43

Now, we first find a, c, d, e from the Venn Diagram:

Since  n(A∩B)= 43

a+b=43\\\\a+33=43\\\\a=43-33\\\\a=10

For Diary product,

10+a+b+c=71\\\\a+b+c=61\\\\10+33+c=61\\\\c=18

For pollen,

a+30+b+e=98\\\\10+30+33+e=98\\\\e=98-73=25

For animal dander,

c+b+d+e=96\\\\18+33+25+d=96\\\\d=96-76=20

So, Total allergic persons = 10+18+20+25+30+10+33=146

So, (a) What percent of Dr. Hawk's patients are allergic to animal dander?

Percentage that patients are allergic to animal dander is given by

\dfrac{96}{146}\times 100=65.75\%

(b) What percent of Dr. Hawk's patients are allergic only to animal dander?

Percentage that patients are allergic to only animal dander is given by

\dfrac{20}{146}\times =13.7\%

Hence, a) 65.75%

b) 13.7%

3 0
3 years ago
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cestrela7 [59]

Answer:

3 1/3 miles per hour

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7 0
3 years ago
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