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3 years ago

If a – 2 = -12, then a = ______.

Mathematics

2 answers:

nata0808 [166]3 years ago

6 0

A=-10 all you do to find a is simply add 2 to both sides of the equal sign

blondinia [14]3 years ago

4 0

Answer:

a= -10

Step-by-step explanation:

To do this you would need to isolate a, or make a stand alone on its side of the equation

a-2=-12 Original equation

a-2+2 = -12+2 Isolating the variable(adding the 2 will cancel the -2 on the left side of the equation)

a= -12+2 Simplification

a= -10 The answer!!!

I hope this helps!!!

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olga55 [171]

3/4+z=5/6

Find the common denominator which is 12 for 3/4 and 5/6.

Multiply by 3 for 3/4.

Multiply by 2 for 5/6.

3(3)/4(3)=9/12

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9/12+z=10/12

Move 9/12 to the other side. Sign changes from 9/12 to -9/12.

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z=1/12

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3 years ago

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adelina 88 [10]

Answer:

The general rule for the nth term of this sequence will be:

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Step-by-step explanation:

Given the sequence

12a, 15a, 18a, 21a, 24a,...

An arithmetic sequence has a constant difference 'd' and is defined by

$a_n=a_1+\left(n-1\right)d$

Here,

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d = 15a-12a = 3a, d = 18a-15a=3a, d=21a-18a=3a, d=24a-21a=3a

using the nth term formula

$a_n=a_1+\left(n-1\right)d$

substituting a₁ = 12a, d = 3a

$a_n=12a+\left(n-1\right)3a$

$=12a+3na-3a$

$=3na+9a$

Therefore, the general rule for the nth term of this sequence will be:

$a_n=3na+9a$

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Answer:

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