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lukranit [14]
3 years ago
9

(x-7y=-21 12x – 4y= -42

Mathematics
1 answer:
patriot [66]3 years ago
8 0
the answer is x-7y+21=0
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All whole numbers are rational numbers? True or False?
LiRa [457]

Answer: True, because if a number is a whole number, for instance, it must also be an integer and a rational.


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4 years ago
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The first side of a triangle is 4m shorter than the second side. The third side 3 times as long as the first side. The perimeter
viktelen [127]

Answer:

1st side= 4m

2nd side= 8m

3rd side= 12m

Step-by-step explanation:

Let the first, second and third side of the triangle be a, b and c meters respectively.

a= b -4 -----(1)

c= 3a -----(2)

Perimeter of triangle

= a +b +c

= 24

a +b +c= 24 -----(3)

From (1): b= a +4 -----(4)

Subst. (2) and (4) into (3):

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a= 20 ÷5

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Substitute a= 4 into (2):

c= 3(4)

c= 12

Thus, the lengths of the first, second, and third side of the triangle are 4m, 8m and 12m respectively.

4 0
3 years ago
Consider the absolute vale function f(x)=-|x+2|-2<br>the vertex of the function is
Ilya [14]
The vertex of the absolute value function f(x) = |x| is (0,0).
What about <span>f(x)=-|x+2|-2?  This can be re-written as f(x) = -|x-(-2)| -2.
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Someone help? I’m gonna fail pleaseeee. :(
Ilia_Sergeevich [38]

Answer:

-8 < x, the answer is B

Step-by-step explanation:

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Reminder:

<--------------- Negative side/Lower -----------------------> Positive side/Greater

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Someone help!!! it's due in 5 minutes!!!!!
cricket20 [7]

Answer:

B is correct

Step-by-step explanation:

inside the parenthesis you go the opposite way of the sign so |x+7| shifts it to the left 7 units

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