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katrin2010 [14]
3 years ago
6

Twenty subtract from 28

Mathematics
2 answers:
morpeh [17]3 years ago
6 0

Answer:

8

Step-by-step explanation:

Gelneren [198K]3 years ago
3 0

Answer:

-8

Step-by-step explanation:

20-28= -8

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Incorrect, 12.1.53
Ganezh [65]

0.442

Step-by-step explanation:

Step 1 :

Given that 11% of the lights are defective.

So probability of a light randomly chosen is defective is .11

This implies probability of a light randomly chosen is not defective is 1 - .11 = .89

Step 2 :

In a pack of 5 light bulbs the probability that none of them are defective is (0.89)^ 5

Hence the probability that at least one of the light bulbs is defective is

1-(0.89)^ 5  = 1 - 0.558 = 0.442

5 0
3 years ago
Common denominator of 5\12 2\9
Sonbull [250]
36; 12*3 is 36 and 9* 4 is 36 hope i helped :)
5 0
3 years ago
Read 2 more answers
A model rocket launched directly upward at a speed of 16 meters per second from a helght of 2 meters . The f(t) = - 4.9t ^ 2 + 1
Anton [14]

Answer:

f(t) = 15.06 m

Step-by-step explanation:

The relationship between the height of the rocket and the time after launch, t. In seconds is given by :

f(t) = - 4.9t ^ 2 + 16t + 2

We need to find the maximum height the rocket will reach the ground.

When it reaches the ground,

f(t) = 0

So,

Maximum height,

f'(t) = 0

-9.8t+16=0\\\\t=\dfrac{16}{9.8}\\\\t=1.63\ s

Put t = 1.63 in equation (1).

f(1.63) = - 4.9\times (1.63 ^ 2) + 16(1.63) + 2\\\\=15.06\ m

So, the maximum height of the rocket is 15.06 m.

4 0
3 years ago
After the game the coach bought 9 chicken meals for $5 each and 15 burger meals for $6 each. What percent of the total amount th
cluponka [151]
Total amount=9 chicken.($5/chicken)+15 burguer meals.(6$/burquer meal)=
=$45+$90=$135.


Percent (chicken meals)=($45.100%) / $135=33,33%.

Solution: 33,33%.
4 0
3 years ago
Are the graphs of the lines in the pair parallel? Explain.
erica [24]

Answer:

Step-by-step explanation:

you have two functions:

y=x-17

and

y=4/5x+6/5

These lines are not parallel because they have different slopes.

6 0
3 years ago
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