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2 years ago

(Complete the square) (Part 1 of method)

Mathematics

1 answer:

sleet_krkn [62]2 years ago

8 0

If you want to find “x” you would need to isolated isolate the variable “x”. You do This by doing the inverse operation of the equation.

For example,

If you add 39 you’ll subtract 39.

But in this case ask yourself,

What variable do I want?

In this case it’s “x”

What is stopping “x” form being by itself?

Then do the inverse operation to get rid of what stopping x form being by itself.

If you don’t want x I’m sorry I wasn’t of help.

You might be interested in

Verify the identity: tan(x+pi/2)=-cotx please!!

olya-2409 [2.1K]

First we use sin(a+b)= sinacosb+sinbcosa
and cos(a+b)=cosa cosb -sinasinb

tan(x+pi/2)= sin(x+pi/2) / cos(x+pi/2)
and sin(x+pi/2) = sinxcospi/2 + sinpi/2cosx =cosx,
cos(x+pi/2) = cosxcospi/2- sinxsinpi/2= - sinx,
 because cospi/2 =0, and sinpi/2=1

=tan(x+pi/2)= sin(x+pi/2) / cos(x+pi/2)= cosx / -sinx = -1/tanx = -cotx
from where tan(x+pi/2)=-cotx

5 0

2 years ago

Annie walks 15 feet away from her house and places a mirror on the ground. She backs 4 feet away from the mirror so that she can

Firdavs [7]

Answer:

18.75 ft

Step-by-step explanation:

The given scenario can be drawn as shown in the following attachment.

Given that,

$m\angle DCE=\angle ACB$ and $m\angle DEC=\angle ABC=90^{\circ}$

Therefore, $\Delta ABC\sim \Delta DEC$

$\Rightarrow \dfrac{AB}{DE}=\dfrac{BC}{EC}$

$\Rightarrow \dfrac{AB}{5}=\dfrac{15}{4}$

$\Rightarrow AB=\dfrac{15\times 5}{4}=18.75$ ft

AB is the height of the house.

7 0

3 years ago

Read 2 more answers

Solve 2(4/x+8)=18 Side note: 4/X is supposed to be a fraction

kirill115 [55]

9514 1404 393

Answer:

x = 4

Step-by-step explanation:

Divide by 2, subtract 8 ...

2(4/x +8) = 18

4/x +8 = 9

4/x = 1

4 = x . . . . . multiply by x

6 0

2 years ago

Read 2 more answers

10 points pls answer this is due tonight

lilavasa [31]

1.12 2.60 hope this helps if it is wrong then I’m sorry

5 0

2 years ago

PLEASE HELP ;) Who did it right? Find the slope of the line perpendicular to 2x+3y=8

levacccp [35]

Answer:

Marissa.

Step-by-step explanation:

To find perpendicular slope you basically take the slope of the given line and reverse whatever sign it had previously. (If it was negative, it would become positive. If it was positive it would become negative.)

By doing -A/B it make the previous slope negative.

Brandon only flipped the fraction which would just result in the slope being slightly steeper, or in this case, less steep than the previous line, rather than making it perpendicular.

Hope this helps! Stay safe and if you have any questions feel free to ask!

6 0

2 years ago