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Verdich [7]
3 years ago
14

Can someone please help with this question due in 5 minutes (ASAP)

Mathematics
1 answer:
tamaranim1 [39]3 years ago
4 0

Answer:

62.4 cm squared

Step-by-step explanation:

8^2-4^2=48

The square root of 48 is 6.928

7*2.928=48.497

(6.928*4)/2=13.856

48.497+13.856= 62.353 or 62.4

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15. A rectangle has a length of 2x - 1 and a width of 3x + 7. Find the perimeter of this rectangle.
andrew11 [14]

Answer:

10x + 12 and 6x² + 11x - 7

Step-by-step explanation:

The perimeter (P) of a rectangle is calculated as

P = 2l + 2w ( l is length and w is width )

   = 2(2x - 1) + 2(3x + 7) ← distribute parenthesis

    = 4x - 2 + 6x + 14 ← collect like terms

     = 10x + 12

--------------------------------------------------

The area (A) of a rectangle is calculated as

A = lw

   = (2x - 1)(3x + 7) ← expand using FOIL

    = 6x² + 14x - 3x - 7 ← collect like terms

    = 6x² + 11x - 7

7 0
2 years ago
PLZ help fast I need this I’ll give brainliest
rodikova [14]

Answer:

1. 2

2.circle

3.b tan t

Step-by-step explanation:

5 0
3 years ago
How do find the height of the parallelogram?
Yanka [14]
You need to multiply the base by the height.
5 0
3 years ago
Determine values of a, b,c, d, e for the cubic spline
Aleonysh [2.5K]
There is not enough information

6 0
2 years ago
Explain how to determine the zeros of f(x)= (x+3)(x-2)(x-6)
Deffense [45]

Answer:

The zeros of f(x)  are -3, 2 , 6

Step-by-step explanation:

f(x) is a polynomial of degree 3.

If the polynomial is not factorized we will either factorize to find the zero or use trial and error method.

Since the f(x) in the question is in the factorized form. we will have to equate each factor to zero.

f(x) = (x+3)(x-2)(x-6)

x + 3 = 0 => x = -3

x - 2 = 0 =>  x = 2

x - 6 = 0 => x = 6

8 0
2 years ago
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