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nlexa [21]
2 years ago
10

A snow storm dumped `8 inches in a 12 hour period. how many inches where falling per hour?

Mathematics
2 answers:
chubhunter [2.5K]2 years ago
8 0
0.6666... inches were falling per hour.
In order to solve this question you have to divide 8 by 12. You will get 0.66666....
Softa [21]2 years ago
7 0
8 inches/12h = ?/1h
cross product: 8 X 1 / 12 = ?
8/12= 0,6666 (or 2/3) inch
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A N S W E R Q U I C K P L E A S E
chubhunter [2.5K]

Answer:

1. A

2. D

3. D

Step-by-step explanation:

The standard form of a parabola is

y=\frac{1}{4p}(x-h)^2+k            ..... (1)

Where, (h,k) is vertex, (h,k+p) is focus and y=k-p is directrix.

1. The directrix of a parabola is y=−8 . The focus of the parabola is (−2,−6) .

k-p=-8                   ...(a)

(h,k+p)=(-2,-6)

k+p=-6            .... (b)

h=-2

On solving (a) and (b),  we get k=-7 and p=1.

Put h=-2, k=-7 and p=1 in equation (1).

y=\frac{1}{4(1)}(x-(-2))^2+(-7)

y=\frac{1}{4}(x+2)^2-7

Therefore option A is correct.

2 The directrix of a parabola is the line y=5 . The focus of the parabola is (2,1) .

k-p=5                   ...(c)

(h,k+p)=(2,1)

k+p=1            .... (d)

h=2

On solving (c) and (d),  we get k=3 and p=-2.

Put h=2, k=3 and p=-2 in equation (1).

y=\frac{1}{4(-2)}(x-(2))^2+(3)

y=-\frac{1}{8}(x-2)^2+3

Therefore option D is correct.

3. The focus of a parabola is (0,−2) . The directrix of the parabola is the line y=−3 .

k-p=-3                   ...(e)

(h,k+p)=(0,-2)

k+p=-2            .... (f)

h=0

On solving (e) and (f),  we get k=-2.5 and p=0.5.

Put h=0, k=-2.5 and p=0.5 in equation (1).

y=\frac{1}{4(0.5)}(x-(0))^2+(-2.5)

y=\frac{1}{2}(x)^2-2.5

y=\frac{1}{2}(x)^2-\frac{5}{2}

Therefore option D is correct.

5 0
3 years ago
What value makes the equation 11-3x=-7 true?
german
X = 6

11-3x=-7
Subtract 11 from both sides.

-3x = -18
Divide -3 on both sides.

X = 6
7 0
3 years ago
Read 2 more answers
PLS HELP WILL GIVE BRAINLIEST PLSSSSSSSS
Anna71 [15]

Answer:

C

Step-by-step explanation:

6 * 5 = 30

3*4 = 12

30 + 12 = 42

42 does not equal 18

7 0
3 years ago
  Van Gogh’s painting Starry Night measures 92 cm long by 73 cm high. You buy two posters, each showing an enlargement of the pa
nirvana33 [79]
I think it's 138 Long by 109.5 more accurate .
92/73 = 1.26
120/100 = 1.2
138/109.5 =1.26
Hence 138 by 109.5 is more proportionate
3 0
3 years ago
Create an algebraic equation for the word problem below.
BigorU [14]

Answer:

  • p = 5 + 2d

Step-by-step explanation:

Let the day number be d and the price after d days be p, then required equation is:

  • p = 5 + 2d

6 0
3 years ago
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