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spin [16.1K]
3 years ago
6

Plssssssssssssssssssssssssssssssssssssssssssssssss help 30 POINTS

Mathematics
2 answers:
ivanzaharov [21]3 years ago
8 0

Answer:

500 yd (^)3

Step-by-step explanation:

25 x 10 x 2

GuDViN [60]3 years ago
3 0

Answer:

500

Step-by-step explanation:

multiply all of them

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The equation for a parabola has the form y = ax^2 + bz + c, where a, b, and c are constants and aメ0. Find an equation for the pa
vova2212 [387]

Answer:

a = 2, b = -9, c = 3

Step-by-step explanation:

Replacing x, y values of the points in the equation y = a*x^2 + b*x +c give the following:  

(-1,14)

14 = a*(-1)^2 + b*(-1) + c  

(2,-7)

-7 = a*2^2 + b*2 + c  

(5, 8)  

8 = a*5^2 + b*5 + c  

Rearranging:

a - b + c = 14  

4*a + 2*b + c = -7

25*a + 5*b + c = 8

This is a linear system of equations with 3 equations and 3 unknows. In matrix notation the system is A*x = b whith:

A =

1    -1  1

4    2  1

25  5  1

x =

a  

b

c

b =

14

-7

8

Solving A*x = b gives x = Inv(A)*b, where Inv(A) is the inverse matrix of A. From calculation software (I used Excel) you get:

inv(A) =  

0.055555556 -0.111111111   0.055555556

-0.388888889 0.444444444   -0.055555556

0.555555556 0.555555556 -0.111111111

inv(A)*b

2

-9

3

So, a = 2, b = -9, c = 3

5 0
3 years ago
3(x-6)^4+11=15 solve for x
Tamiku [17]

Answer:

x = 7.07 or 4.925

Step-by-step explanation:

3(x-6)^4+11=15

3(x-6)^4=15-11

(x-6)^4=4/3

x-6 = +\sqrt[4]{4/3} or -\sqrt[4]{4/3}

x= +\sqrt[4]{4/3} +6 or -\sqrt[4]{4/3}  +6

x = 7.07 or 4.925

7 0
2 years ago
The rectangle is 20 by 16 and the scale factor is 0.25. What are the dimensions of the reduced rectangle?
antoniya [11.8K]

Answer:

1,280

The dimensions are 5 by 4

Step-by-step explanation:

You multiply 20 and 16 then, divide 0.25 then you get 1,280

4 0
3 years ago
Help me with this please!!!!!!!!!!!!!
Mademuasel [1]

Answer:

1mm

cos(60)= 1/2

1/2 x 2 = 1

1 mm

5 0
3 years ago
A rectangular garden has length and width as given by the expressions below.
anyanavicka [17]

Answer:

(8 - 42x - 56y -12xy) is you're answer.

Step-by-step explanation:

6 0
3 years ago
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