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d1i1m1o1n [39]
3 years ago
14

Solve for a. a + (−5) = 12

Mathematics
2 answers:
Alex787 [66]3 years ago
8 0

Answer:

a=17

Step-by-step explanation:

any number plus a negative number is basically subtracting the absolute value of the negative number. so 12 + 5 = 17

Vsevolod [243]3 years ago
7 0

Answer:

a = 17

Step-by-step explanation:

a + (-5) = 12

Open the bracket;

a - 5 = 12

Add 5 to both sides

a - 5 + 5 = 12 + 5

Therefore,

a = 17

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X+2y-z=5<br> -X-y+2z=-13<br> 2x+y-2z=14
faltersainse [42]

Answer:

x+2y-z=5 ...(1)\\ -x-y+2z=-13...(2) \\ 2x+y-2z=14...(3) \\  \\ add \: (2) + (3) \\\boxed{x= 1} \\ 2 \times (1) + (2) \\ x + 3y =  - 3 \\ 1 + 3y =  - 3 \\ 3y =  - 4 \\ \boxed{y =  -  \frac{4}{3}  }\\ solve \: for \: z \\ x + 2y - z = 5  \\ 1-\frac{4}{3}(2)-z=5\\3-8-3z=15\\3z=-20\\\boxed{z = -   \frac{20}{3} }

3 0
3 years ago
What are the first ten multiples of 4
krok68 [10]
4,8,12,16,20,24,28,32,36,40
7 0
4 years ago
Read 2 more answers
Plz help !!!!!!!!!!!!!
Serhud [2]

I not 100% sure but I chose C.

Hope this helps.. but good luck :)

3 0
3 years ago
If x=7cm what is the surface area of the geometric shape formed by this net
Mekhanik [1.2K]
There are four rectangles and 2 squares.

Let’s start with the four rectangles.
4 [ 2x(x)]
4 [ (2*7)(7)] = 392 cm^2
______________

Next, let’s find the SA for the two squares.
2 [(2x)^2]
** I need to be clear that both the 2 and the x in the parentheses are squared because the square, of course, is a “perfect square”. This was probably obvious and needless to say, haha oh well.
Next step: plug in values
2 [ [2(7)]^2 ] = 392 cm^2

TOTAL: 392+392 = 784 cm^2

Wow I should have realized the the 4 rectangles are the area as the two squares.

Good luck to you!
If you have any other math questions, I can try my best to answer them. Just send me a comment or whatever works.
7 0
3 years ago
Solve the equation below:<br> 11(x+10)=132
storchak [24]

Answer:

x = 2

Step-by-step explanation:

6 0
3 years ago
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