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natita [175]
3 years ago
15

Which of these inequalities has no solutions?

Mathematics
1 answer:
s2008m [1.1K]3 years ago
7 0

Answer:

<h2>B)√x<-14</h2>

Step-by-step explanation:

  • as we know a redical expression is always greater than or equal to 0
  • but the B) means that the redical expression is less than 0 which is false

therefore our answer is B

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Find the sum and product of the roots. 2x^2 + 6x - 8 = 0
netineya [11]
Suppose you can factorize:

ax^2+bx+c=a(x-r_1)(x-r_2)

Then by expanding the right side, you have

ax^2+bx+c=a(x^2-(r_1+r_2)x+r_1r_2)=ax^2-a(r_1+r_2)x+ar_1r_2

which means in this case, you have to have

\begin{cases}6=-2(r_1+r_2)\\-8=2r_1r_2\end{cases}\implies\begin{cases}r_1+r_2=-3\\r_1r_2=-4\end{cases}
3 0
3 years ago
Please help I’ll mark you as brainliest if correct
Len [333]

Answer:

I think it is option B

Step-by-step explanation:

I dont know if I am right

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4 0
3 years ago
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Let z = 5. What is the value of (10 + 25) ÷ z?
Murrr4er [49]

Answer:

<h2>A. 7</h2>

Step-by-step explanation:

Put z = 5 to the expression (10 + 25) ÷ z:

(10 + 25) ÷ 5 = 35 ÷ 5 = 7

5 0
3 years ago
The Quick Change Oil Company has a number of outlets in the metropolitan Seattle area. The daily number of oil changes at the Oa
Rashid [163]

Answer:

5 classes.

Step-by-step explanation:

You can use the 2^k rule to determine the number of classes for a frequency distribution.

The 2^k rule says that 2^k\geq n where

k is the number of classes

n is the number of the data points

We know that the number of data points is n = 20.

Next, we start searching for k so that we can get a number 2 to the k that is larger that the number of data points.

2^4=16\\2^5=32

This suggests that you should use 5 classes.

8 0
3 years ago
Solve for a, geometry work
melisa1 [442]

Answer:

a = 45 degrees

Step-by-step explanation:

Since both angles are a, they are equal to each other

Also, we know that the right angle means it measures 90 degrees

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4 0
3 years ago
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