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77julia77 [94]
3 years ago
5

Help..........................

Mathematics
1 answer:
xeze [42]3 years ago
3 0

Answer:

-21 yd

Step-by-step explanation:

-31-2+12=-21

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Can 12/15 be simplify
Semmy [17]
Yes 12/15 can be simplified. 

To simplify 12/15 find the greatest common multiple. The <span> greatest common multiple of 12/15 is 3. Now divide 12/15 by 3. 
</span>
12 ÷ 3 = 4 
15 ÷ 3 = 5 

4/5 is the simplified version of 12/15


6 0
4 years ago
the average of two numbers is 34 the first number is three times the second number what are the two numbers
tino4ka555 [31]
Hi there!

To solve this problem, we need to set up two equations and use the system of equations to solve.

Let x be the first number.
Let y be the second number.

(x + y) ÷ 2 = 34
x = 3y

Now, we can use substitution to solve.

(3y + y) ÷ 2 = 34
4y ÷ 2 = 34
2y = 34
y = 17

Now, we plug the value of y in the equation to solve for x.

x = 3*17
x = 51

Hope this helps!
7 0
4 years ago
Show that det(A) = 0 without directly evaluating the determinant. A = [-4 1 1 1 1; 1 -4 1 1 1; 1 1 -4 1 1; 1 1 1 -4 1; 1 1 1 1 -
Anuta_ua [19.1K]
You could interpret them as system of equation and answer the question easily

from A 

-4x + y + x + w =1

write in same form from A 

as this system has five variables and four of them are unknowns it means the unique solution is not possible 

So, det (A) = 0



8 0
3 years ago
Read 2 more answers
What is the probability of drawing a king and a diamond from a standard deck of cards
stiv31 [10]

Answer:

P(king or diamond) = P(king) + P(diamond) - P(king and diamond) P(king or diamond) = (4/52) + (13/52) - (1/52) P(king or diamond) = 16/52 Page 5 P(king or diamond) = 4/13.

3 0
2 years ago
Answer these 2 questions if ur smart?!?!?
Mariulka [41]

1. (4x+5y)(2x-3y)+3xy= 4x*2x-4x*3y+5y*2x-5y*3y+3xy=8x^2-12xy+10xy-15y^2+3xy= 8x^2+xy-15y^2

2. (2x^2+3)(4x+5)-8x(x^2-2)=2x^2*4x+2x^2*5+3*4x+3*5-8x*x^2+8x*2=

=8x^3+10x^2+12x+15-8x^3+16x=

=10x^2+28x+15

8 0
3 years ago
Read 2 more answers
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