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Shkiper50 [21]
3 years ago
8

Can u help if three times a number is increased by 4 the results is -8 . find the number

Mathematics
2 answers:
Oksi-84 [34.3K]3 years ago
8 0
Lets write x the number unknown

3x+4= -8
3x=-8-4
3x=-12
x= - 4
Fudgin [204]3 years ago
3 0
Write as an equation.

3n+4=-8

Whenever you have two things that are equal and you do the same thing to each of them, they will still be the same. We can use this to our advantage here. Just use inverse operations to get x on its own.

Subtract 4 from each side.

3n+4-4=-8-4 \\ 3n=-12

Divide each side by 3.

\frac{3n}3=\frac{-12}3 \\\\ \boxed{n=-4}
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<h3>What is the number of people who get 1/6 of the pizza for lunch?</h3>

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On this note, the 4/6 fraction of pizza left mean: 4 × 1/6.

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Read more on fractions;

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Nimfa-mama [501]

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There is convincing evidence because the entire interval is above 0.

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It gives convincing evidence when 0 is not part of the confidence interval.

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3 0
1 year ago
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adell [148]

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Step-by-step explanation:

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koban [17]

Answer:

step 2

and then also in step 3 compensating the error in step 2

Step-by-step explanation:

I think I just answered this for another post.

sin(a - b) = sin(a)cos(b) - cos(a)sin(b)

so, step 1 is correct :

sin(A - 3pi/2) = sin(A)cos(3pi/2) - cos(A)sin(3pi/2)

but step 2 suddenly and incorrectly switched that central "-" to a "+".

yes, sin(3pi/2) = -1, but that is still an explicit factor in step 2. so it was not used to flip the central operation from subtraction to addition, and therefore this change was a mistake.

then, in step 3, another error was made by just ignoring the "-" sign of "-1" and still keeping the central "+" operation. this error compensated for the error in step 2 bringing us back by pure chance to the right result.

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joja [24]

Answer:

You may just add 2 in the spot. Moreover, you get no solution.

Step-by-step explanation:

Hope this helped!

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