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3 years ago

Dave makes 12 groups of 10 rocks and has none left over. How many rocks does Dave have?

Mathematics

2 answers:

Butoxors [25]3 years ago

7 0

120, because you would multiply 10 times 12 which is 120 The pic shows it

zhannawk [14.2K]3 years ago

5 0

120

because 12X10 is 120 and he has 12 groups of 10

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The mathematics department of a college has 15 male professors, 9 female professors, 6 male teaching assistants, and 12 female t

Vesnalui [34]

Given:

The number of male professors = 15.

The number of female professors = 9.

The number of male teaching assistants = 6.

The number of female teaching assistants = 12.

A person is selected randomly from the group.

Required:

We need to find the probability that the selected person is a professor or a male.

Explanation:

The total number of people in the group = 15+9+6+12 = 42

n(S) =The total number of people in the group

$n(S)=42$

Let A be the event that the selected person is a professor or a male.

The number of people who are professors or male = 15+9+6 = 30

n(A)= The number of people who are professors or male.

$n(A)=30$

Let P(A) be the probability that the selected person is a professor or a male.

$P(A)=\frac{n(A)}{n(S)}$ $P(A)=\frac{30}{42}$ $P(A)=\frac{15}{21}=\frac{5}{7}$

Final answer:

The probability that the selected person is a professor or a male is 5/7.

7 0

1 year ago

Between which two integers is the value of √11?

Makovka662 [10]

The square root of 9 is 3
The square root of 11 is ?
The square root of 16 is 4

Between 3 and 4

3 0

1 year ago

A foreign country uses the stellar as its currency. Before a trip to that country, Jon wants to exchange $1,300 to stellar. Wh

Sergio [31]

Answer:

✔️Bank A has a better exchange rate

✔️Mr Jon would get 6,630 Stellar if he uses the bank with the better exchange rate

Step-by-step explanation:

✔️The bank that has the greater unit rate or constant of proportionality is the bank that has a better exchange rate.

Exchange rate of bank A:

Exchange rate = unit rate or constant of proportionality = y/x

Where, x = dollars, and y = stellar

Exchange rate/constant of proportionality, using one pair, (80, 408) would be:

y/x = 408/80 = 5.1 (this means 5.1 Stellar per dollar)

Exchange rate for bank A:

Using a point on the proportional graph, (10, 50),

Exchange rate/constant of proportionality = y/x = 50/10 = 5 (this means 5 Stellar per dollar)

Therefore, we can conclude that Bank A has a better exchange rate, because it has a greater constant of proportionality. This would mean more Stellar for Jon per dollar he wants to exchange.

✔️If Jon exchanged $1,300 at the better rate that Bank A offers, he would get the following amount of Stellar:

1,300 × 5.1 = 6,630 Stellars

5 0

3 years ago

Which equation matches the graph?

lakkis [162]

Answer:

Match the x coordinates with the y ones

Step-by-step explanation:

Basically that’s it

6 0

3 years ago

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When full, a 22-gallon gas tank holds 129.8 pounds of gasoline. Estimate the weight of one gallon of gasoline. If it costs $91.3

Oksana_A [137]

129.8/22= 5.9 lb
<span>$91.30/22= $4.15 a gallon
That is my answer.</span>

3 0

3 years ago