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2 years ago

Solve the following system of equations using any method you want. 10y+24=-3x 3x-9=y

Mathematics

1 answer:

Nina [5.8K]2 years ago

3 0

Answer:

Step-by-step explanation:

3x-9=y

+9. +9

3x=9y

divide three to both sides answer

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13. Basil Tomlin's online checking account had a balance of $371.07. The balance did not

poizon [28]

Answer:

Step-by-step explanation

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2 years ago

Can somebody prove this mathmatical induction?

Flauer [41]

Answer:

See explanation

Step-by-step explanation:

1 step:

n=1, then

$\sum \limits_{j=1}^1 2^j=2^1=2\\ \\2(2^1-1)=2(2-1)=2\cdot 1=2$

So, for j=1 this statement is true

2 step:

Assume that for n=k the following statement is true

$\sum \limits_{j=1}^k2^j=2(2^k-1)$

3 step:

Check for n=k+1 whether the statement

$\sum \limits_{j=1}^{k+1}2^j=2(2^{k+1}-1)$

is true.

Start with the left side:

$\sum \limits _{j=1}^{k+1}2^j=\sum \limits _{j=1}^k2^j+2^{k+1}\ \ (\ast)$

According to the 2nd step,

$\sum \limits_{j=1}^k2^j=2(2^k-1)$

Substitute it into the $\ast$

$\sum \limits _{j=1}^{k+1}2^j=\sum \limits _{j=1}^k2^j+2^{k+1}=2(2^k-1)+2^{k+1}=2^{k+1}-2+2^{k+1}=2\cdot 2^{k+1}-2=2^{k+2}-2=2(2^{k+1}-1)$

So, you have proved the initial statement

4 0

2 years ago

Questioning my sanity once again....

Rama09 [41]

Answer:

it not wrong to do it it's just not right to do it I get it

I do it too sometimes so it not just you

oh and can I have brainliest it would really help out

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2 years ago

I need help what is 6+(-7)

natita [175]

Answer:

-1

because you are adding up to 0 to get back to the positive.

8 0

2 years ago

Read 2 more answers

Use the written method to solve: 1,365+1,289 .<br>Please i need a quick help with this

julia-pushkina [17]

Step-by-step explanation:

I'm not sure what you mean by 'written method' but the sum is 2,654.

6 0

2 years ago