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3 years ago

Plz help with mathmatics 1 hour till test

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

8 0

1) 6x-5 = 2x + 7

4x=12 and x =3

2) since PQ//SR, Ange S is the supplement of angle P
31° + P° =180°, and P° = 149°

3) The kite has a symmetric axis that is y-axis and
the coordinate of E(w,0)

4) The midpoint of WX:. Let M be the Midpoint
Formula to find the coordinates of Midpoint, knowing the coordinates
of W(0,4b) and X(2a,0) is:
the x of M = (x₁+x₂)/2 = (0+ 2a)/2 =a
and the y of M =(y₁+y₂)/2 = (4b+0)/2 =2b, so M(a,2b)

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Find the indicated conditional probability

andrezito [222]

Given:

The two way table.

To find:

The conditional probability of P(Drive to school | Senior).

Solution:

The conditional probability is defined as:

$P(A|B)=\dfrac{P(A\cap B)}{P(B)}$

Using this formula, we get

$P(\text{Drive to school }|\text{ Senior})=\dfrac{P(\text{Drive to school and senior})}{P(\text{Senior})}$ ...(i)

From the given two way table, we get

Drive to school and senior = 25

Senior = 25+5+5

= 35

Total = 2+25+3+13+20+2+25+5+5

= 100

Now,

$P(\text{Drive to school and senior})=\dfrac{25}{100}$

$P(\text{Senior})=\dfrac{35}{100}$

Substituting these values in (i), we get

$P(\text{Drive to school }|\text{ Senior})=\dfrac{\dfrac{25}{100}}{\dfrac{35}{100}}$

$P(\text{Drive to school }|\text{ Senior})=\dfrac{25}{35}$

$P(\text{Drive to school }|\text{ Senior})=0.7142857$

$P(\text{Drive to school }|\text{ Senior})\approx 0.71$

Therefore, the required conditional probability is 0.71.

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Q19.Sunday equals 351 so that plus a hundred equals 451 plus 50 equals 501 so now we round it to closest number wensday at 506

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