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3 years ago

my teacher has 30 red apples and 40 green apples is she adds all of them together how many will she have

Mathematics

1 answer:

yanalaym [24]3 years ago

3 0

70 applesAnswer:

Step-by-step explanation:

Because 30+40=70

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Suppose that the probabilities are 0.4, 0.3, 0.2, and 0.1, respectively, that 0, 1, 2, or 3 power failures will strike a certain

defon

Answer:

mean = 1 power failure

variance = 1 (power failure)²

Step-by-step explanation:

Since the mean is computed as

mean = E(x) = ∑ x * p(x) for all x

then for the random variable x=power failures , we have

mean = ∑ x * p(x) = 0 * 0.4 + 1* 0.3 + 2*0.2 + 3* 0.1 = 1 power failure

since the variance can be calculated through

variance = ∑[x-E(x)]² * p(x) for all x

but easily in this way

variance = E(x²) - [E(x)]² , then

E(x²) = ∑ x² * p(x) = 0² * 0.4 + 1²* 0.3 + 2²*0.2 + 3²* 0.1 = 2 power failure²

then

variance = 2 power failure² - (1 power failure)² = 1 power failure²

therefore

mean = 1 power failure

variance = 1 power failure²

7 0

3 years ago

The cost of a pizza is $8.50 plus $1.35 per topping. How many toppings are on a pizza that costs $13.90?

VMariaS [17]

Answer:

8.50 + 1.35n = 13.90

Step-by-step explanation:

So basically you have to add the cost of pizza and the per toppings correct me if i'm wrong Also Have a good Wonderful day!

And that's 4 toppings

3 0

3 years ago

Read 2 more answers

462.6017281 what is the nearest tenth

Westkost [7]

Answer:

462.60

Step-by-step explanation:

1-5 the #stays the same

6-10 goes to the next # up

7 0

3 years ago

Incorrect

artcher [175]

Answer:

You do total/volume
13150/640= 20 with a remainder of 350
Meaning 350 acres of land are not within a square mile

6 0

3 years ago

Lily, Louis, and Ben went to an arcade and won tokens for prizes. Louis won 4.5 times as many tokens as Ben. Lily won 8 more tok

lana66690 [7]

The expression that describes the number of tickets won by Lily is:

a = 8 + 4.5c where "a" is the number of tokens won by Lily and "c" is the number of tokens won by Ben

Solution:

Given that Lily, Louis, and Ben went to an arcade and won tokens for prizes

Let "a" be the number of tokens won by Lily

Let "b" be the number of tokens won by Louis

Let "c" be the number of tokens won by Ben

Given that Louis won 4.5 times as many tokens as Ben

So we can frame a equation as:

number of tokens won by Louis = 4.5 times as many tokens as Ben

number of tokens won by Louis = 4.5 x number of tokens won by Ben

$b = 4.5 \times c$

b = 4.5c

Given that Lily won 8 more tokens than Louis

number of tokens won by Lily = 8 + number of tokens won by Louis

a = 8 + b

Substituting the value of b = 4.5c in above expression

a = 8 + 4.5c

Thus the expression that describes how many tokens Lily won is found

7 0

3 years ago