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photoshop1234 [79]
3 years ago
11

True or false..How do I know if it's no solution

Mathematics
1 answer:
Misha Larkins [42]3 years ago
4 0

Answer:

False

Step-by-step explanation:

If (8,9) is a solution, you will be able to substitute 8 for x, and 9 for y.

(-2 x 8) + (4 x 9) = -20?

-2 x 8 = -16

4 x 9 = 36

-16 + 36 = 20

So, (8,9) is not a solution to the system.



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Find sec A and cot B exactly if a = 8 and b = 7.
Shtirlitz [24]

Answer:

sec A= 1.01 and cot B =8.25

Step-by-step explanation:

Given :

sec A and cotB if a =8 and b=7

Now,

=sec A=\frac{1}{cos A} \\\\\frac{1}{cos 8} \\\\\frac{1}{0.99} \\1.01

and

cot B=\frac{cosB}{sin B} \\cotB=\frac{cos 7}{sin7} \\cot B =\frac{0.99}{0.12} \\cot B =8.25

Therefore, answer will be sec A= 1.01 and cot B =8.25

8 0
3 years ago
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RSB [31]

What i can see the total amount is wrong

3 0
3 years ago
Read 2 more answers
What are the solutions to the quadratic equation below in factored form?
saw5 [17]

Answer:

\cfrac{-4}{3} and \cfrac{1}{2}.

Step-by-step explanation:

Equation:

\rm \:  \: (2x - 1)(3x + 4) = 0

Solution:

Set factors equal to zero,that is:

(2x - 1) = 0 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: ...(1)

(3x + 4) = 0 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: ...(2)

Solving for equation 1:

  • 2x - 1 = 0
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  • 2x =  1

  • \boxed{x =  \cfrac{  1}{2} }

Solving for equation 2:

  • 3x + 4 = 0
  • 3x = 0 - 4
  • 3x =  - 4

  • \boxed{x =  \cfrac{ - 4}{3} }

Hence,the solutions to the quadratic equation in factored form is \cfrac{-4}{3} and \cfrac{1}{2}.

\rule{225pt}{2pt}

Good luck on your assignment!

4 0
2 years ago
Read 2 more answers
Express 75° in radians. Round to the nearest hundredth.
allsm [11]
Hello!

To convert degrees to radians you multiply it by \frac{ \pi }{180}. We will do so below.

75(\frac{ \pi }{180})≈1.31

Therefore, the correct answer is A.1.31 radians.

I hope this helps!
7 0
3 years ago
U 7.2.PS-9 Solve. 5 1 7 3*+ 3x = 173 + 3 The value of x is​
mafiozo [28]

Answer:

Example

Step-by-step explanation:

1 Determine if the value 3 is a solution of the equation .Notice in the equation 3x + 3 = x + 13, the solution 5 is not evident by . 2x-2x + 9 = 3x- 9-2x+ 9. 9 = x. from which the solution 9 is obvious. If we wish, we .

Missing: 7.2. ‎PS- ‎173.

hope this helped

6 0
3 years ago
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