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mojhsa [17]
3 years ago
7

In the following question, a is a real number. Question: what choice of a would yield a system of linear equations with NO solut

ions?
9x-14y=-3

2x-ay=-6
Mathematics
1 answer:
Yanka [14]3 years ago
3 0

Answer: The value of <em>a</em> should be 3.11.

Step-by-step explanation:

Since we have given that

9x-14y=-3\\\\2x-ay=-6

We need to find the value of a so that it would yield a system of linear equations with NO solutions.

As we know the condition of no solutions, it means the lines should be parallel.

i.e.

\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}\neq \dfrac{c_1}{c_2}

Consider the first two terms:

\dfrac{9}{2}=\dfrac{-14}{-a}\\\\a=\dfrac{2\times 14}{9}\\\\a=3.11

So, the value of<em> a</em> should be 3.11.

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Solve for x.
xenn [34]

Answer:

a \: \:  x =  \frac{ -1 ±  i\sqrt{139}}{14}

Explanation:

Since this is unfactorable, use the Quadratic Formula:

x =  -b ± \frac{ \sqrt{ {b}^{2} - 4ac}}{2a}

Now, take the information and input it:

-1 ± \frac{ \sqrt{1 - 4(7)(5)}}{2(7)} \\  \\ -1 ± \frac{ \sqrt{ -139}}{ 14} = \frac{-1 ±  i\sqrt{139}}{14}

I am joyous to assist you anytime.

5 0
3 years ago
Solving and graphing absolute value equations
Monica [59]
\begin{gathered} -4\text{ + 7}x\text{ }\leq6x\text{ + 2} \\ 7x-6x\leq2+4 \\ x\text{ }\leq6 \end{gathered}

6 0
1 year ago
What is the answer??
LekaFEV [45]

Answer:

3 1/5 (or 3.5)

Step-by-step explanation:

2(7) - 7(-1)

_______

7 + -1

Next:

14 + 7 (two negatives make a positive)

_____

6

Next:

21/6 which equals 3 1/2 (3.5)

7 0
3 years ago
100 blue marbles to 60 red marbles=
Aloiza [94]
So the ratio is 100:60 and that simplified is 5:3. for every 5 blue there is 3 red
4 0
3 years ago
Read 2 more answers
A probability experiment is conducted in which the sample space of the experiment is upper s equals { 1 comma 2 comma 3 comma 4
Softa [21]

You can think of this experiment as follows: you have to select a random number between 1 and 15, where each number is equally likely to appear.

Player A wins if 3,4,5 or 6 are picked.

Player B wind is 10,11 or 12 are picked.

Two events are said to be mutually​ exclusive if they cannot happen at the same time. So, in our metaphor, the question is: can we pick a particular number, so that both players win simultaneously?

The question is no, because if player A wins, we have picked 3,4,5 or 6, and player B wins with none of these numbers.

Similarly, if player B wins, we have picked 10, 11 or 12, and player A wins with none of these numbers.

So, the two events cannot occur simultaneously.

If you want to be more formal, since the events are subset of the sample space, two events are mutually exclusive if their intersection is the empty set, and this is the case:

A \cap B = \{3,4,5,6\}\cap\{10,11,12\} = \emptyset

8 0
3 years ago
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