3 years ago

Please answer the following question

Mathematics

1 answer:

seropon [69]3 years ago

3 0

Answer:

first give options it is very hard to do

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Find the discrimnate of -x^2+2x-8=0

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Answer:

-28

Step-by-step explanation:

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How do you write 208,000,478 in expanded form

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200,000,000+8,000,000+400+70+8=208,000,478

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Pls help Giving brainlist if you help

Ad libitum [116K]

Answer:

blank A is 9. Blank B is 41. Blank C is 18. Blank D is 24

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3 years ago

Find all solutions of the equation in the interval [0, 2pi).

mina [271]

Answer:

x = 0 , π

Step-by-step explanation:

$-4 \sin x = 1 - cos^2 x$

Rewrite it by using the identity $\sin^2x + \cos^2x = 1$

$=> -4\sin x = \sin^2x$

Add 4sin x to both the sides.

$=> -4\sin x + 4\sin x = sin^2x + 4\sin x$

$=> \sin^2x + 4\sin x = 0$

Take sin x common from the expression in L.H.S.

$=> \sin x(\sin x + 4)=0$

Here , we can get two more equations to find x.

1) $\sin x(\sin x + 4)=0$

Divide both the sides by sin x

$=> \frac{\sin x(\sin x + 4)}{\sin x} = \frac{0}{\sin x}$

$=> \sin x + 4 = 0$

Substract 4 from both the sides.

$=> \sin x + 4 - 4 = 0 - 4$

$=> \sin x = -4$

$=> x = No \; Solution$

2) $\sin x(\sin x + 4)=0$

Divide both the sides by (sin x + 4)

$=> \frac{\sin x(\sin x + 4)}{\sin x + 4} = \frac{0}{\sin x + 4}$

$=> \sin x = 0$

$=> x = 0 \; , \pi$ over interval [0 , 2π).

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3 years ago

An investor invested a total of $3,500 in two mutual funds. One fund earned a 8% profit while the other earned a 5% profit. I

Triss [41]

Answer:

i found this so srry if its wrong i saw no one answering this so i wanna help

Step-by-step explanation:

so, x*(7/100) + (3500 - x)*(4/100) = 197

=> 3x + 14000 = 19700

=> 3x = 19700 - 14000

=> x = 5700/3 = 1900

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2 years ago