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Dominik [7]
3 years ago
11

If u could answer this u would be magical

Mathematics
1 answer:
11Alexandr11 [23.1K]3 years ago
8 0

Answer:

12r^2        +r         -7

Step-by-step explanation:

9r^2 +4r -7 +3r^2 -3r

Combine like terms

9r^2 +3r^2 +4r -3r -7

12r^2        +r         -7

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Plz help me this isn’t that hard but I’m struggling so plz I don’t want another detention
Olenka [21]

Answer:

The length of the total 8 pieces in 0.8 meters = 6.4 meters

How many pieces there are in the remaining 0.4 meter = 6.5

Step-by-step explanation:

0.8 x 8 = 6.4

9 meters - 6.4 meters = the remaining 2.6 meters

2.6 x 0.4 = 6 1/2 pieces of ribbon in 0.4 meters.

5 0
3 years ago
Write 3x^2+7x+2 in the form of a(x-h)^2+k
sertanlavr [38]

Answer:

y = 3(x+7/6)² - 25/12

Step-by-step explanation:

3 0
3 years ago
A manufacturer is designing a flashlight. For the flashlight to emit a focused beam, the bulb needs to be on the central axis of
aalyn [17]
From the problem, the vertex = (0, 0) and the focus = (0, 3)
From the attached graphic, the equation can be expressed as:
(x -h)^2 = 4p (y -k)
where (h, k) are the (x, y) values of the vertex (0, 0)
The "p" value is the difference between the "y" value of the focus and the "y" value of the vertex.
p = 3 -0
p = 3
So, we form the equation
(x -0)^2 = 4 * 3 (y -0)
x^2 = 12y
To put this in proper quadratic equation form, we divide both sides by 12
y = x^2 / 12

Source:
http://www.1728.org/quadr4.htm




5 0
3 years ago
For questions 6a & 6b, calculate the mean for each group: 6a) Textbook A 6b) Textbook B Mean: ______________ Mean: _________
lisabon 2012 [21]

Answer:

44 52 95 76 13 94 83 72 55 81 22 25 64

The mean is: 59.7

65 72 48 63 68 59 68 62 75 79 81 72 64

The mean is: 67.4

3 0
3 years ago
Determine A:B:C, if A:B= 2:3 and B:C =4: 5​
cestrela7 [59]
I’m confused what we are suppose to do
6 0
3 years ago
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