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V125BC [204]
3 years ago
12

Please solve and show step by step Best answer get rewarded!

Mathematics
1 answer:
Arisa [49]3 years ago
6 0
B² - 4ac
= 8² - 4*(-2)*(-9)
= 64 - 72
= -8
You might be interested in
Please help me with this problem, please
Harman [31]

Answer:

sin(x) = 5/13

cos(y) = 5/12

Therefore, sin(x) = cos(y)

Step-by-step explanation:

Trig ratios:

sin(\theta)=\dfrac{O}{H}\\\\\\cos(\theta)=\dfrac{A}{H}\\\\\\tan(\theta)=\dfrac{O}{A}

where \theta is the angle, O is the measure of the side opposite the angle, A is the measure of the side adjacent to the angle and H is the hypotenuse, of a right triangle

We have been given the measures of the two legs, so we can find the measure of the hypotenuse by using Pythagoras' Theorem a^2+b^2=c^2

(where a and b are the legs and c is the hypotenuse of a right triangle)

\implies 5^2+12^2=c"\\\\\implies 169=c^2\\\\\implies c=\sqrt{169}\\\\ \implies c=13

Now we can use the trig ratios:

\implies sin(x)=\dfrac{5}{13}

\implies cos(y)=\dfrac{5}{13}

Therefore, sin(x) = cos(y)

8 0
2 years ago
Need help with this one will mark brainliest
const2013 [10]
1,-7 would be the answer I believe
7 0
3 years ago
Read 2 more answers
10 Pts + Brainliest for best answer.<br><br> Please answer quickly. Thanks!
Juliette [100K]

m∠AOC = m∠AOB + m∠BOC

We have m∠AOC = 19°, m∠AOB = 4x - 15 and m∠BOC = 2x + 10. Substitute:

19 = (4x - 15) + (2x + 10)

19 = (4x + 2x) + (-15 + 10)

19 = 6x - 5          <em>add 5 to both sides</em>

24 = 6x       <em>divide both sides by 6</em>

4 = x

m∠BOC = 2x + 10 → m∠BOC = 2(4) + 10 = 8 + 10 = 18

m∠AOB = 4x - 15 → m∠AOB = 4(4) - 15 = 16 - 15 = 1

<h3>Answer: c. m∠BOC = 18°, m∠AOB = 1°</h3>
5 0
2 years ago
Read 2 more answers
Pls help me on problem 45 will give u brainliest (7th grade math)
german
The answer to that would be 0
3 0
1 year ago
Help : Math ...........................
katen-ka-za [31]
\frac{-6*10^{-1} }{-3*10^{-2}}

You divide -6 and -3

\frac{2*10^{-1}}{10^{-2}}

Because the exponents are both negative, you make them positive and change the position (the exponent which is at the denominator is now at the numerator and viceversa)

\frac{2*10^{2}}{10^{1}}


\frac{2*10^{2}}{10^1}

You divide the exponents (so 2-1)

2*10 = 20
3 0
3 years ago
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