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Darya [45]
3 years ago
14

Combine the like terms to make a simpler expression: −3k−(−8)+2

Mathematics
1 answer:
Alex777 [14]3 years ago
5 0
The answer to this question is: -3k+10
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Each music class sings 8 songs a week.How many does each class sing in 5 weeks? 6 weeks? 7 weeks?
Scilla [17]

In 5 weeks they sing 280, in 7 weeks they sing 392, and in 6 weeks they sing 336. For this problem you have to figure out how days are in a week n multiply that by the number of songs they give you n then you have to multiply that by how many weeks they give you n then u keep repeating these steps until you ate done with all of your problems n you get your answer

7 0
3 years ago
If the length of rectangle is thrice of its breadth and it's perimeter is 32 cm then finds its area​.​
jeka57 [31]

Answer:

48 cm²

Explanation:

Let the breadth be b, then the length is 3b

P = 2(Length + Breadth)

32 = 2(3b + b)

32 = 2(4b)

8b = 32

b = 4

Breadth is 4 cm

Length: 3b = 3(4) = 12 cm

Area of rectangle:

Length × Breadth

12 × 4

48 cm²

3 0
2 years ago
Read 2 more answers
Exponet for 13 ·13·13·13
photoshop1234 [79]
The exponent for that would be 13^3.

If the answer is incorrect, then i am sorry.
6 0
3 years ago
Read 2 more answers
Please help me, I don't know how to do this...
Lunna [17]

Answer:

  A.  5

Step-by-step explanation:

The triangle will be a right triangle when the side lengths satisfy the Pythagorean theorem: the sum of the squares of the legs is equal to the square of the hypotenuse.

  (x +1)^2 +x^2 = (√61)^2

  x^2 +2x +1 +x^2 = 61 . . . eliminate parentheses

  2x^2 +2x = 60 . . . . . . .subtract 1, collect terms

  x^2 +x -30 = 0 . . . . . divide by 2, subtract 30

  (x +6)(x -5) = 0 . . . . factor the quadratic

  x = -6 or +5

The solution is x = 5.

_____

Side lengths cannot be negative. Solution values are values of x that make the factors zero. x+6=0 when x=-6, for example.

8 0
2 years ago
Write the formula for the parabola that has x-intercepts (1.3,0) and (-1.3,0), and y intercept (0,169)
stepan [7]
It is 3.25/5.40 I think
5 0
3 years ago
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