What is the solution of 7k+2=4k-10?

Mathematics

1 answer:

Gnoma [55]3 years ago

3 0

k=-4

7k+2=4K-10

+10 +10

7k+12=4K

-7k -7k

12=-3k

Divide both sides by -3

K=-4

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Hola qué tal con todos me podrían ayudar porfavor pero rapidito plis porfavor

saveliy_v [14]

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8 0

3 years ago

7+x/5=-4 what does x equal

Georgia [21]

Note the equal sign. What you do to one side, you do to the other.

Do the opposite of PEMDAS.

Subtract 7 from both sides

x/5 + 7 = -4

x/5 + 7 (-7) = -4 (-7)

x/5 = -11

Next, to isolate the x, multiply 5 to both sides

x/5(5) = -11(5)

x = -11(5)

x = -55

-55 is your answer for x.

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fgiga [73]

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Step-by-step explanation:

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Of the 84 parents who attended a meeting at a school, 35 volunteered to supervise children during the school picnic and 11 volun

Tatiana [17]

Answer:

The number of parents who volunteered to bring refreshments is 16.

Step-by-step explanation:

The information provided is:

N = 84

n (S) = 35

n (S ∩ R) = 11

n (R) = 1.5 × n (S' ∪ R')

Compute the value of n (S ∪ R) as follows:

$n(S\cup R)=n(S)+n(R)-n (S\cap R)\\\\n(S\cup R)=n(S)+[1.5(N-n(S\cup R)]-n (S\cap R)\\\\n(S\cup R)=n(S)+1.5N-1.5n(S\cup R)-n (S\cap R)\\\\2.5n(S\cup R)=n(S)+1.5N-n (S\cap R)\\\\2.5n(S\cup R)=35+(1.5\times84)-11\\\\2.5n(S\cup R)=150\\\\n(S\cup R)=\frac{150}{2.5}\\\\n(S\cup R)=60$