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3 years ago

Which of the following constants can be added to x^2 - 10x to form a perfect square trinomial?

Mathematics

2 answers:

Alchen [17]3 years ago

8 0

Halve middle term
-10/2=-5
squaer it
(-5)^2=25
that is what should be added

answer is 25

lidiya [134]3 years ago

8 0

b)-25 is the correct answer.

I just did this exact question in my schooling.

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Can someone please help me

nadya68 [22]

Answer:

Right option is B.

Step-by-step explanation:

$\sf \longrightarrow \frac{ \sec x \sin( - x) + \tan( - x) }{1 + \sec( - x) } \\ \\ \sf \longrightarrow \frac{ \sec x( - \sin x) - \tan x}{1 + \sec x} \\ \\ \sf \longrightarrow \frac{ - \frac{1}{ \cos x } \times \sin x - \tan x }{1 + \sec x} \\ \\ \sf \longrightarrow \frac{ - \tan x - \tan x}{1 + \sec x} \\ \\ \sf \longrightarrow \frac{ - 2 \tan x}{1 + \sec x} \\ \\ \sf \longrightarrow \frac{ \frac{ - 2 \sin x}{ \cos x} }{1 + \frac{1}{ \cos x} } \\ \\ \sf \longrightarrow \frac{ \frac{ - 2 \sin x}{ \cos x} }{ \frac{ \cos x + 1}{ \cos x} } \\ \\ \boxed{ \sf{\longrightarrow \frac{ - 2 \sin x}{ \cos x + 1} }}$

4 0

2 years ago

Let f(x) = - 10x + 9 and g(x) = x2 + 12 Find f( - 4)/g( - 4)

Reptile [31]

Answer:

$\frac{49}{28}$

Step-by-step explanation:

Evaluate g(- 4) and f(- 4) by substituting x = - 4 into g(x) and f(x), that is

f(- 4) = - 10(- 4) + 9 = 40 + 9 = 49

g(- 4) = (- 4)² + 12 = 16 + 12 = 28

Then

$\frac{f(-4)}{g(-4)}$ = $\frac{49}{28}$ = $\frac{7}{4}$

7 0

3 years ago

Please solve!! solve for y 3x-y=16 Will name the Brainliest!!

algol [13]

Answer:

y= 5.333

Step-by-step explanation:

4 0

3 years ago

If m L=65, then m LJK=___ ????? PLS HELP ASAP

aleksandr82 [10.1K]

Answer:

50 degrees

Step-by-step explanation:

If angle L = 65 then the top angle for the triangle LMJ has to be 25 degrees as M is a right angle (or at least has to be for this problem to be possible)

the math to figure it out is 90+65+x=180 <-- due to triangles are 180 degrees inside which simplifies to 25 after that you just have to at 25 to itself 25+25 to get 50 which is the angle of J

4 0

2 years ago

A = bh; A =96, b = 12 What does h equal?

Elza [17]

96=12.h
h=96/12
h= 8

6 0

3 years ago