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2 years ago

Factorise x^2-4 in maths

Mathematics

2 answers:

insens350 [35]2 years ago

6 0

The person above me is correct.

Nataliya [291]2 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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Sixty percent of the students at a certain school wear neither a ring nor a necklace. Twenty percent wear a ring and 30 percent

Reptile [31]

Answer:

0.4

Step-by-step explanation:

Given

60 % wear neither ring nor a necklace

20 % wear a ring

30 % wear necklace

This question can be Solved by using Venn diagram

If one person is choosen randomly among the given student the probability that this student is wearing a ring or necklace is

$P\left ( wear \ ring\ or \ necklace )+P\left ( neither\ ring\ or\ necklace)=1$

$P\left ( wear \ ring\ or\ necklace )=1-0.6=0.4$

The sum of probabilty is equal to 1 because it completes the set

Therefore the required probabilty is 0.4

7 0

3 years ago

If you shift the exponential parent function, f(x) = 2^x , right 2 units, what is the equation of the new function?

aev [14]

Answer:

$g(x)=2^{x-2}$

Step-by-step explanation:

Translations

For $a > 0$

$f(x+a) \implies f(x) \: \textsf{translated}\:a\:\textsf{units left}$

$f(x-a) \implies f(x) \: \textsf{translated}\:a\:\textsf{units right}$

$f(x)+a \implies f(x) \: \textsf{translated}\:a\:\textsf{units up}$

$f(x)-a \implies f(x) \: \textsf{translated}\:a\:\textsf{units down}$

Parent function: $f(x)=2^x$

Translated 2 units right: $g(x)=f(x-2)=2^{x-2}$

6 0

2 years ago

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a group f 4 people share 1/2 pound of almonds.How many pounds of almonds does each person get? Choose an equation you can use to

taurus [48]

Answer:

0.125 pounds

Step-by-step explanation:

If their are four people in a group with 1/2 pound of almonds you would divide 0.5 by 4. You would get 0.5 because 1/2 is equivalent to 0.5.

8 0

3 years ago

What things should be written in the conclusion of letter

GarryVolchara [31]

Answer:

Your signature, and a nice 4-word goodbye

Step-by-step explanation:

Your signature so they know it was YOU who wrote it and a nice 4-word goodbye to show the other person that you care.

3 0

3 years ago

Solve x/2 - 3 = 7 A. 5 B. 10 C. 20 D. 40

12345 [234]

Answer:

The answer is C.

Step-by-step explanation:

Add 3 to both sides and you will get x/2=10. Multiply by the reciprocal on both sides making x=20.

4 0

3 years ago

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