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3 years ago

True or false: the value of 3pi/2 is a solution for the equation 2sin^2 x-sin x-1 =0

Mathematics

1 answer:

Ede4ka [16]3 years ago

6 0

The answer would be true, because the 2 on the bottom of the fraction would cancel out the 2 in the equation.

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How do you solve y=3x+5

guajiro [1.7K]

It depends how you want to solve it
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3 years ago

I have no idea how ti so this one can sombody help do this one please it is hard

Vinil7 [7]

Not as hard as you think.
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4 0

3 years ago

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Stella [2.4K]

The answer to this equation is 1412 or 21-15

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3 years ago

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bobby’s christmas list had 3 more than twice as many items on it than johnny’s list. johnny asked for 8 fewer items than bobby.

Nataly [62]

Answer:

Johnny had 5 items and Bobby had 13 items.

Step-by-step explanation:

Let us assume that Johnny has x items and Bobby has y items in their list.

Bobby had 3 more than twice as many items on it than Johnny. So,

$\Rightarrow y=3+2x$ ----------1

Johnny asked for 8 fewer items than bobby. So,

$\Rightarrow y-8=x$ -----------2

Putting the value of x from equation 2 in equation 1, we get

$\Rightarrow y=3+2(y-8)$

$\Rightarrow y=3+2y-16$

$\Rightarrow 2y-y=16-3$

$\Rightarrow y=13$

Putting the value of y in equation 2,

$\Rightarrow 13-8=x$

$\Rightarrow x=5$

So, Johnny had 5 items and Bobby had 13 items.

3 0

3 years ago

The diameter of a circle endpoints are A(-1, 5) and B(4,-3). Use the midpoint formula to find the coordinates of the center of c

mina [271]

Answer:

centre = ( $\frac{3}{2}$ , 1 )

Step-by-step explanation:

using the midpoint formula

midpoint = [ $\frac{1}{2}$ (- 1 + 4), $\frac{1}{2}$ (5 - 3) ] = ( $\frac{3}{2}$ , 1 )

6 0

3 years ago