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Radda [10]
3 years ago
14

Một lô hàng có 6 chính phẩm và 4 phế phẩm, lấy ngẫu nhiên 2 sản phẩm. tìm kỳ vọng của số chính phẩm

Mathematics
1 answer:
lana66690 [7]3 years ago
4 0

Answer:

I'm sorry I didn't understand

Step-by-step explanation:

sorry

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Someone please help me!<br> 15 points
Genrish500 [490]

Answer:

g . 47.6 degrees.

Step-by-step explanation:

g.  The 3 towns form a right angled triangle and

tan A = BC/BA

= 105 / 96

A = 47.6 degrees.

6 0
3 years ago
Solve the system of equations.
guajiro [1.7K]

Answer:

Option 2: (1, 0) and (0, -5)

Step-by-step explanation:

Let's solve this system of equations using the elimination method.

Start by labelling the two equations.

5x -y= 5 -----(1)

5x² -y= 5 -----(2)

(2) -(1):

5x² -y -(5x -y)= 5 -5

Expand:

5x² -y -5x +y= 0

5x² -5x= 0

Factorise:

5x(x -1)= 0

5x= 0 or x -1= 0

x= 0 or x= 1

Now that we have found the x values, we can substitute them into either equations to solve for y.

Substitute into (1):

5(0) -y= 5 or 5(1) -y= 5

0 -y= 5 or -y= 5 -5

y= -5 or -y= 0

y= 0

Thus, the solutions are (0, -5) and (1, 0).

3 0
2 years ago
Consider the equation 4+2(5x-8) = ax +b.
vlada-n [284]

Answer:

a = 10, b = -12

Step-by-step explanation:

4+2(5x-8) = ax +b

4 + 10x - 16 = ax + b

10x - 12 = ax + b

Infinitely many solutions when:

a = 10

b = -12

5 0
3 years ago
Read 2 more answers
Hi please help me, i’ll give brainliest
Licemer1 [7]

Answer:

lol dont u love these answers.

the answer is: NO SOLUTION

Step-by-step explanation:

i swear these are the most annoying lol.

please give me brainliest

btw try using math_way for a future reference.

have a good day!

8 0
2 years ago
Cedric and Josh both ordered the same size pizzas at Marco’s Pizzeria; however, they ordered different toppings. Marco’s charges
Oksanka [162]
Let
C---------> <span>the cost of a pizza
</span>t----------> <span>number of toppings

we know that
</span>$15.74-3t=$14.49-2t
15.74-14.49=3t-2t-------------> t=1.25

the cost of one topping is $1.25
and the cost of one pizza <span>without topping is
</span>15.74-3*1.25--------> $11.99

then
<span>an equation for the cost of a pizza, C, as a function of the number of toppings, t ordered is
</span>C=11.99+1.25t

the answer is 
C=11.99+1.25t
6 0
2 years ago
Read 2 more answers
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