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dezoksy [38]
3 years ago
9

Which statement about the following equation is true? 2x2 – 9x + 2 = –1

Mathematics
1 answer:
forsale [732]3 years ago
3 0

Answer:

The discriminant is greater than 0, so there are two real roots.

Step-by-step explanation:

Had the same Q.

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Use pencil and paper to create a table of values for the equation, x - 2y = 6. Rearrange the equation into the y = mx + b form.
Lunna [17]

Answer:

y = 1/2x -3

x=-2 ⇒ y =  -4

x=-1 ⇒ y =  -3.5

x=0 ⇒ y =  -3

x=1 ⇒ y =  -2.5

x=2 ⇒ y = -2

Step-by-step explanation:

Hi, to answer this question we have to isolate y:

x - 2y = 6

-2y =6-x

y = (6-x)/-2

y = -3+1/2x

y = 1/2x -3  

Now, we have to create a table with the next values (see attachment)

x=-2 ⇒ y = 1/2x -3 = 1/2(-2)-3= -4

x=-1 ⇒ y = 1/2x -3 = 1/2(-1)-3= -3.5

x=0 ⇒ y = 1/2x -3 = 1/2(0)-3= -3

x=1 ⇒ y = 1/2x -3 = 1/2(1)-3= -2.5

x=2 ⇒ y = 1/2x -3 = 1/2(2)-3= -2

Feel free to ask for more if needed or if you did not understand something.

7 0
4 years ago
A car travels 180 miles in 3 hours and 45 minutes. How many miles does it travel per hour?
RUDIKE [14]

Answer:

48 miles per hour

Step-by-step explanation:

first I would convert everything to hours It makes it easier. That means that 3 hours and 45 mins becomes 3 3/4 hours So now you have 180/3.75 = the rate. To find the answer, simply divide that, and you get 48. 48 miles per hour

6 0
3 years ago
Read 2 more answers
What is the standard deviation for 212,249,212,248,239,212,216,234,248
Eddi Din [679]

Answer:

15.90  

Step-by-step explanation:

The formula for standard deviation, σ, of a population is

\sigma = \sqrt{\frac{1 }{N }\sum_{i=1}^{N}(x_{i}-\mu)^{2}}

We can use a table to organize the calculations.

  <u>   x   </u>      <u>x - µ </u>    <u>(x - µ)² </u>

  212         -18        324

  249         19        361

  212         -18        324

  248         18        324

  239          9           81

  212        -18         324

  216        -14         196

  234          4           16

<u>   248         18        324</u>

2070                   2274

Sum= 2070

N = 9

µ = Sum/N = 2070/9 = 230

\sigma = \sqrt{\frac{1 }{9 }\times2274} =\sqrt{252.7} = 15.90

3 0
3 years ago
The sale price of a TV that is currently 30% off the regular price of $328 can be found using any expression below except: 1. 0.
vivado [14]
<span>30% off the regular price means 100% - 30% = 70%
and 70% = 0.7
so 0.7 x 328 = 228.9

answer </span><span>2. 0.7 × 328</span>
4 0
3 years ago
What does an isometric transformation do?
BaLLatris [955]

Answer:

Option: B is correct.

( Preserves the shape and size of the figure )

Step-by-step explanation:

  • An ISOMETRIC TRANSFORMATION (RIGID MOTION) is a transformation that preserves the distances and/or angles between the pre-image and image.
  • The isometric transformations are reflection, rotation and translation and combinations of them such as the glide, which is the combination of a translation and a reflection.

Hence, option B is correct.

Preserves the shape and size of the figure.

4 0
3 years ago
Read 2 more answers
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