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3 years ago

∠10° is complementary to which of the following angles?

Mathematics

2 answers:

Alex17521 [72]3 years ago

7 0

Answer:

Step-by-step explanation:

Complementary angles add up to 90.

So 90-10=80.

faust18 [17]3 years ago

5 0

Answer:

∠80°

Step-by-step explanation:

NOTE: Complementary is when the sum of two angles is equal to 90° degrees

Please mark as brainliest if answer is right

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Use the quadratic formula to solve the following equation -3x^2-x-3=0

tigry1 [53]

Answer:

$x=-\frac{1}{6}-\frac{\sqrt{35}}{6} i \text { and } x=-\frac{1}{6}+\frac{\sqrt{35}}{6} i$ are two roots of equation $-3 x^{2}-x-3=0$

Solution:

Need to solve given equation using quadratic formula.

$-3 x^{2}-x-3=0$

General form of quadratic equation is $a x^{2}+b x+c=0$

And quadratic formula for getting roots of quadratic equation is

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

In our case b = -1 , a = -3 and c = -3

Calculating roots of the equation we get

$\begin{array}{l}{x=\frac{-(-1) \pm \sqrt{(-1)^{2}-4(-3)(-3)}}{2 \times-3}} \\\\ {x=-\frac{1}{6} \pm\left(-\frac{\sqrt{-35}}{6}\right)}\end{array}$

Since $b^{2}-4 a c$ is equal to -35, which is less than zero, so given equation will not have real roots and have complex roots.

$\begin{array}{l}{\text { Hence } x=-\frac{1}{6}-\frac{\sqrt{35}}{6} i \text { and } x=-\frac{1}{6}+\frac{\sqrt{35}}{6} i \text { are two roots of equation - }} \\ {3 x^{2}-x-3=0}\end{array}$

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4 years ago

arjun is as twice as older than shriya. five years ago his age was three times shreya's age. find their present age.

chubhunter [2.5K]

Answer:10 and 20

Step-by-step explanation:Shreyas age:X

Arjuns age: 2x

Shreyas age 5 years ago:x-5

Arjuns age 5 years ago: 2x-5

We get the equation: 2x-5=3(x-5)

2x-5=3x-15

2x-3x=-15+5

-x=-10

X= 10

Shreyas present age is 10 years

Arjuns present age is 2x(2×10) =20 years

Please mark my answer as Brainliest ❤️

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3 years ago

Select the only true statement from the following. Question 17 options: Opposite numbers have the same sign and are the same dis

Brut [27]

Answer:

The true statement is "Opposite numbers have different signs but are the same distance from zero."

Some examples of opposite numbers are 1 and -1, 6 and -6, and 10 and -10.

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3 years ago

Which of the following (x,y) pairs is the solution to the system of equations –3x + y = –8 and x + 2y = 12 ?

slavikrds [6]

Answer:

Step-by-step explanation:

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It will take her about 7 days, because :
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3 years ago

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