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2 years ago

Which integer represents 8°C below 0?

Mathematics

2 answers:

iVinArrow [24]2 years ago

7 0

-8

....................

Alinara [238K]2 years ago

7 0

-8 because 0 - 8 = -8
Hope dis halps

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Determine the equation for the parabola graphed below.

stiks02 [169]

The generic equation of a parabola is:
f (x) = ax ^ 2 + bx + c
To verify the equation of the parabola you need three points:
f (x) = ax ^ 2 + bx + c
We choose the points:
(x, y) = (- 1,7)
7 = a (-1) ^ 2 + b (-1) + c
7 = a - b + c
(x, y) = (0,5)
5 = a (0) ^ 2 + b (0) + c
5 = c
(x, y) = (- 2,5)
5 = a (-2) ^ 2 + b (-2) + c
5 = 4a - 2b + c
We solve:
c = 5
5 = 4a - 2b + 5
7 = a - b + 5
Rewriting
b = 2a
a-b = 2
Substituting:
a-2a = 2
a = -2
b = -4
The equation of the parabola is:
f (x) = - 2x ^ 2 -4x + 5

3 0

2 years ago

Golf in golf , the lowest score wins . One golfer finishes a course at -9 . A second golfer finishes at -12 .

rusak2 [61]

Answer:

The lower score is -12, and he wins buy (12 -9) , or 3 points

3 0

2 years ago

Zachery is solving the equation 3/4 (x - 8) = 12

Maru [420]

Answer:

3/4*x - 3/4*8=12

3/4x -6=12

3/4x=12+6

3/4x=18

x=24

Step-by-step explanation:

multiply 3/4 into the content inside the brackets

have -3/4*8 cross the equal sign changing its sign from - to +

divide both sides by 3/4

6 0

2 years ago

Expand & simplify (2x+6)(x−9)

Alex777 [14]

Answer:

2x^2-12x-54

Step-by-step explanation:

First 2x times x along with 2x times -9

Second 6 times x along with 6 times -9

2x^2-18x+6x-54

=2x^2-12x-54

8 0

1 year ago

Which expression is equivalent to n+n+n? A. 3^n B. 3n C. n^3 D. n+3

Irina18 [472]

Answer:

B. 3n

Step-by-step explanation:

n + n + n = 3n

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

3n = n + n + n

#IhopeThisHelp

5 0

1 year ago