What is the value of x 3+ x = -5

2 answers:

6 0

Answer is -8
Step by step

To solve for “x” we need to first isolate x on one side of the = sign.

3 + x = - 5
Subtract 3 from both sides.
3 - 3 + x = - 5 + ( -3)
(the 3 and -3 cancel each other)

x = -5 -3

X .= - 8

That’s your answer!

Scorpion4ik [409]1 year ago

5 0

Hello there! Given the equation 3 + x = -5, x = -8.

When adding a negative and a positive, it is the same principle of subtracting the numbers and taking the sign of the larger number. To find what x represents, we use inverse operations which means to subtract -5 - 3.

Given the expression:

-5 - 3 = -8

One thing to consider when subtracting a negative and positive is that it is the same thing as doing the inverse of subtracting; it means to add the numbers and possess the sign of the larger number.

Therefore, to find what x equals, we would add 5 + 3 which gives us 8. Since 5 is greater than 3, the negative sign is kept for the answer. Because of this, -5 - 3 = -8.

x = -8

If you need any extra help, let me know and I will gladly assist you.

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Item cost $430 before taxes and the sales tax is $38.70 find a sales tax

natulia [17]

Answer:

sales tax= 9 %

Step-by-step explanation:

sales tax= cost x %tax

38.70 = 430 x %tax

%tax = 38.7/430 = 0.09 = 9 %

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8 0

4 years ago

All of the following expressions have the same value except

MrMuchimi

Answer:

1 - 4/5-(-1/5)

Step-by-step explanation:

1. - 4/5-(-1/5)

= -0.8+0.2 (if there is a minus sign inside and outside of the parenthesis, when we destroy that parenthesis, both the minus signs will be multiplied and becomes a (+).) (Making it to the percentile).

= -0.6

2. - 4/5-1/5

= -0.8-0.2

= -1

3. -(4/5+1/5)

= -(0.8+ 0.2) (Making those to the percentile).

= -(1) = -1 (When we destroy the parenthesis, if there is a minus sign outside the parenthesis, the result will become a minus.)

From the above expressions, we can see that after calculating, the second and third expressions have the same value, i. e. -1. However, the result of the first expression is different, and we get -0.6. So option one is the right choice.

6 0

3 years ago

MATRECIES: Suppose ={u,v,w}⊆R3 is linearly independent. Determine if the set 4 ={u, v, v−w, u+v+w} is linearly independent or li

AlladinOne [14]

The set is linearly dependent.

To explicitly prove this, we need to show there is at least one choice of constants $c_1,c_2,c_3,c_3\in\Bbb R$ such that

$c_1 u + c_2 v + c_3(v-w) + c_4(u+v+w) = 0$

or equivalently,

$(c_1 + c_4) u + (c_2 + c_3 + c_4) v + (-c_3 + c_4) w = 0$

which is the same as solving the system of equations

$\begin{cases} c_1 + c_4 = 0 \\ c_2 + c_3 + c_4 = 0 \\ -c_3 + c_4 = 0 \end{cases}$

From the first and last equations, we have $c_1=-c_4$ and $c_3=c_4$ . Substituting these into the second equation leaves us with $c_2-2c_1=0$ , and so the overall solution set is