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2 years ago

Which best describes how to find the additive inverse of an integer?

Mathematics

1 answer:

qwelly [4]2 years ago

5 0

4. Change the sign of the integer

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In an atom, electrons have a negative charge and protons have a positive charge. One negative and

Ostrovityanka [42]

Answer:

The charge is negative and the amount is 215

Step-by-step explanation:

Electrons are negative

-354

Protons are positive

+139

-354+139

-215

6 0

2 years ago

What is the lcm 3 and 10

alukav5142 [94]

30, you could just multiply both numbers, but it's also better to list out the factor until both match

6 0

3 years ago

Read 2 more answers

If the check after the substitution of the answer doesn't work, does that mean that the result is incorrect for equation with va

Alecsey [184]

I don't understand what your point is. Mind posting a picture or something?

8 0

3 years ago

Y = 4x+1 y=x^2 + 2x - 2 A.6,2 B. 2,6 C. -6,2 D. -6,-2

natta225 [31]

Answer:

The solution is (3,13) and (-1,-3). So none of the mentioned options is correct.

Step-by-step explanation:

Given that

$y = 4x + 1 (i)$

$y = x^2 + 2x -2 (ii)$

Now, by susbstituting the value of 'y' from equation i to equation ii, we get

$4x+1=x^2 + 2x -2$

$0=x^2 + 2x -2-4x-1$

$0=x^2 + (2x -4x) +(-2-1)$

$0=x^2 + (-2x) +(-3)$

$0=x^2 -2x -3$

$x^2 -2x -3 = 0 (iii)$

Now by factorization, equation iii can be written as

$x^2 -3x +x -3 = 0$

$x(x -3) + 1(x -3) = 0$

$(x -3)(x +1) = 0$

x = 3 and x = -1

By putting the values of x in equation i, we get

y = 4(3) + 1

y = 12 +1

y = 13

and

y = 4(-1) + 1

y = -4 +1

y = -3

Therefore, the solution is (3,13) and (-1,-3). So none of the mentioned options is correct.

7 0

2 years ago

Which expression is equivalent to -2(1 - 4n)?

padilas [110]

Answer:

-2+8n

Step-by-step explanation:

we can distribute the -2 inside the parentheses to find an equivalent expression.

-2(1-4n)

(-2)(1)+(-2)(-4n)

-2+8n

there's your answer!

7 0

2 years ago