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stealth61 [152]
3 years ago
8

Solve for a. a+(−4)=−13

Mathematics
2 answers:
dangina [55]3 years ago
6 0
In your equation:  a+(-4)=-13
you then add four to each side, 
so a= negative 13 plus 4
so a=  -9
barxatty [35]3 years ago
5 0

Answer:

in your equation:  a+(-4)=-13

you then add four to each side,

so a= negative 13 plus 4

so a=  -9

Step-by-step explanation:

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3 years ago
3 to the square root of 2 x 3 the square root of 9 <br> Simplify
guajiro [1.7K]

Answer:

The answer is 18√2.

Step-by-step explanation:

Looking at the question, the expression should be :

3√2 × 3√9

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3√2 × 3(3)

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4 years ago
A fence must be built to enclose a rectangular area of ft. Fencing material costs per foot for the two sides facing north and so
avanturin [10]

The complete question is

A fence must be built to enclose a rectangular area of 5000ft^2. Fencing material costs $1 per foot for the two sides facing north and south and 2$ per foot for the other two sides. Find the cost of the least expensive fence.

Answer:

Total cost will be $400

Step-by-step explanation:

Let x = be other side

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Area = x*y = 5000

Perimeter of the rectangle  = 2x + 2y

cost of fencing = 2(1)*5000/x + 2*2x

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 now to get the least we will take the derivative of this

C'(x) = 10000(-1/x^2)  + 4 =0

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             y= 100ft  cost = 2*$1*100 = $200

Total cost = $400

3 0
3 years ago
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olga55 [171]

Answer:

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5 0
3 years ago
Please help with this question
lions [1.4K]

Answer:

sin( -∅ )

- 1 / csc ( ∅ )

1 / csc ( -∅ )

Step-by-step explanation:

Since sin(x) is and odd function (a function where f(-a) = f(a) ).

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On the other hand, we know that sin( ∅ ) = 1 / csc ( ∅ )

Another odd function, so the same as before applies.

-sin( ∅ ) = -1 / csc ( ∅ )

-sin( ∅ ) = 1 / csc ( -∅ )

8 0
3 years ago
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