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bulgar [2K]
3 years ago
12

Factorise x^2-4 in maths

Mathematics
2 answers:
insens350 [35]3 years ago
6 0
The person above me is correct.
Nataliya [291]3 years ago
5 0

Answer:

(x-2)(x+2)

Step-by-step explanation:

use the difference of squares

x²-4 = x²-2² = (x-2)(x+2)

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The temperature of a hot steak starts at 140f and decreases at 5f per minute what will the temperature of this steak after a cer
irina1246 [14]

Answer:

T(m) = (140 - 5m)

Step-by-step explanation:

Given that :

Initial temperature, a = 140 F

Rate of decrease = 5 F per minute

Given a certain Number of minutes, m

Temperature, T after m minutes ;

Using the formula :

Final temperature = Initial temperature - 5*number of minutes)

T(m) = (140 - 5m)

Given that ; m = 10

T(10) = 140 - 5(10)

T(10) = 140 - 50

T(10) = 90 F

7 0
3 years ago
What is the value of' x'?
belka [17]

Answer:

7..the way you worded the options was confusing

3 0
2 years ago
What is the value of h (-2) when h (3) = 32 +1?<br> Enter your answer in the box.<br> h (-2) =
just olya [345]

Answer:(-22)

Step-by-step explanation:

What is the value of h (-2) when h (3) = 32 +1?

hx3=33

33 divided by 3

which means h=11

that makes 11(-2)

=(-22)

8 0
3 years ago
PLEASE HELP !!!!!!!!!
iVinArrow [24]

Answer:

f (x) = 4,500 + 250x; 24 months

Step-by-step explanation:

Because 10,500 - 4,500 = 6,000

6,000 / 250 = 24

Hope this helped

4 0
3 years ago
Help please!! The measures of the angles of a triangle are shown in the figure below. solve for x
tatiyna

9514 1404 393

Answer:

  x = 33

Step-by-step explanation:

The angles are complementary.

  x° = 90° -57°

  x = 33

3 0
3 years ago
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