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Oksanka [162]
3 years ago
9

25x2-8x=12x-4 Can someone please help me on this ?????

Mathematics
2 answers:
kirill [66]3 years ago
7 0

Answer:x=2/5

Step-by-step explanation:

25x2-8x=12x-4

25x2-8x-12x+4=0

25x2-20x+4=0

25x2-10x-10x+4=0

5x(5x-2)-2(5x-2)=0

(5x-2)(5x-2)=0

5x-2=0 and 5x-2=/

5x=2 and 5x=2

X=2/5

Natalka [10]3 years ago
4 0

Answer: X=2.7

Step-by-step explanation:

25*2-8x=12x-4

50-8x = 12x-4

subtract 50 from both sides

-8x = 12x-54

subtract 12x from both sides

-20x= -54

divide both sides by -20

X=2.7

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You flip a coin that is not fair, the prbability of heads on each flip is 0.7. if the coin shows heads, you draw a marble from u
Shkiper50 [21]

Solution :

P(H) = 0.7  ;  P(T) = 0.3

If heads, then Urn H,  1 blue and 4 red marbles.

If tails, then Urn T ,  3 blue and 1 red marbles.

a).

P ( choosing a Red marble )

= P (H) x P( Red from Urn H) + P (T) x P( Red from Urn T)

$=0.7 \times  \frac{4}{5} + 0.3 \times \frac{1}{4}$

= 0.56 + 0.075

= 0.635

b).  If P (B, if coin showed heads)

If heads, then marble is picked from Urn H.

Therefore,

P (Blue) $=\frac{1}{5}$

             = 0.2

c). P (Tails, if marble was red)

$=P (T/R) = \frac{P(R/T)}{P(R)}  \ P(T)$

Where P (R/T) = P ( red, if coin showed tails)

                        $=\frac{1}{4}$

                        = 0.25 (As Urn T is chosen)

P (R) =  P (Red) = 0.635 (from part (a) )

P (T) = P (Tails) = 0.3

∴ $P(T/R) = \frac{0.25 \times 0.3}{0.635}$

                = 0.118

                 

8 0
3 years ago
PWWEEEEZZZZZ AWWWNNSSEEEEERRR THHIIIISN NOOOOOOOOWWWWWWW PLLLSSSSSSSSSSSS 3)
san4es73 [151]

Answer:

Step-by-step explanation:

It’s d

4 0
3 years ago
Which of the following statements are always true for any two sets A and B?
Ivanshal [37]

Answer:

If A ⊆ B, then A ⊂ B.

If A = B, then A ⊆ B.

If A = B, then A ⊂ B.

Step-by-step explanation:

In set theory '⊂' is the symbol of proper subset and '⊆' is the symbol of subset of a set.

In option (a),

If A ⊆ B

⇒ A ⊂ B or A = B

Thus, If A ⊆ B, then A ⊂ B.

Option a is true.

(b) If A ⊂ B

⇒ A is the subset of B

That is, all elements of A are also the element of B,

But we can not say A = B

Thus, option b is not true.

(c) If A = B

⇒ A ⊂ B and A ⊃ B or A ⊆ B and B ⊆ A ( Because every set is the subset of itself )

⇒  A ⊆ B.

Option c is true.

(d) If A = B,

⇒ A ⊂ B

Option d is true.

(e) If A ⊂ B,

Then we can not say that,

A = B or A ≠ B

Thus, option e is not correct.

4 0
4 years ago
Read 2 more answers
Pls help me The cost to rent a bicycle is $10 plus $8 per hour.
tamaranim1 [39]
Hi!

The expression would be or be similar to 10 x 4 + 8

Hope this helps !
6 0
3 years ago
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PLS HELP ILL MARK BRAINLEST PLUS ADDITIONAL POINTSS!!
Serga [27]

Answer:

114

Step-by-step explanation:

15 x 2 + 9 x 2 + 11 x 3 + 11 x 3 = 114

(the bottom portion is equal to 3 x 11)

7 0
3 years ago
Read 2 more answers
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