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3 years ago

9

How to find the zeros of f(x)=-2x^2+8x

1 answer:

BabaBlast [244]3 years ago

4 0

2×^2+8×
8x-2x
6x^2
x=3

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Verify sin2θ/1+cos2θ =tanθ

Andrej [43]

Answer:

LHS.= Sin 2x /( 1 + cos2x )

We have , sin 2x = 2 sinx•cosx

And. cos2x = 2cos^2 x - 1

i.e . 1+ cosx 2x = 2cos^2x

Putting the above results in the LHSwe get,

Sin2x/ ( 1+ cos2x ) =2 sinx•cosx/2cos^2x

=sinx / cosx

= Tanx

.•. sin2x/(1 + cos2x)= tanx

Step-by-step explanation:

4 0

3 years ago

A wasp is a flying insect. In wasps, wing length is coded for by a single gene. Two scientists studying wasps hypothesize that s

Kamila [148]

Answer:

Wasps with long wings can produce offspring with short wings.

Step-by-step explanation:

8 0

3 years ago

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What are the solutions to the equation |x| =15 -4x?

zheka24 [161]

I hope this helps you

5 0

3 years ago

2.) Use the Slope Intercept Form of a line to find the equation of the line from point C to point D.

mezya [45]

First we need slope

C=(0,0)
D(7,12)

$\\ \sf\longmapsto m=\dfrac{12-0}{7-0}$

$\\ \sf\longmapsto m=\dfrac{12}{7}$

Put D co-ordinates on y=mx+b

$\\ \sf\longmapsto 12=\dfrac{12}{7}(7)+b$

$\\ \sf\longmapsto 12=12+b$

$\\ \sf\longmapsto b=12-12$

$\\ \sf\longmapsto b=0$

Now

slope intercept form.

$\\ \sf\longmapsto y=\dfrac{12}{7}x$

As b=0

8 0

2 years ago

Read 2 more answers

100 BRAINLY POINTS

ella [17]

Answer:

After 17 years and 3 months

Step-by-step explanation:

<u>Given function:</u>

f(x)=18000(0.88)^x

We are looking for the value of x at f(x) < 2000

<u>Solve the equation:</u>

2000 = 18000(0.88)^x
(0.88)^x = 2000/18000
(0.88)^x = 0.1111
log (0.88)^x = log 0.1111
x = log 0.1111 / log 0.88
x = 17.18

After 17 years and 3 months the car value drops below $2,000

7 0

2 years ago