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Hunter-Best [27]
3 years ago
15

There are four boys to every five girls in an introductory geology course. If there are 387 students enrolled in the course, how

many are boys?
Mathematics
1 answer:
mihalych1998 [28]3 years ago
5 0

Answer: 172 boys.

Step-by-step explanation: The ratio of boys to girls is 4:5. We can say that the number of boys in the class is four multiplied by the common value that the ratio is based on. We can call this common value x and say that the number of boys in the class is 4x. Applying the same logic to the girls, we can say that there are 5x girls in the class. Thus, a total of 9x children. We divide the total value by 9 to get x, which equals 43. We can then retrieve the number of boys by calculating 4x, which equals 172.

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is this quadrilateral a parallelogram?If yes, state the definition or theorem that justifies your answer.​
Tanya [424]

Answer:

no the quadrilateral isn't a parallelogram

Step-by-step explanation:

For it to be a parallelogram, the opposite sides must be parallel to each other and in this case it's not.

5 0
3 years ago
What is the volume of a prism that is 11×13×21?
posledela

Answer:

3003 units^3.

Step-by-step explanation:

Just multiply the dimensions :

11 * 13 * 21

= 143 * 21

= 3003 units^3.

8 0
3 years ago
Jan and Wayne went to the store to buy some groceries. Jan bought 2 cans of corn beef hash and 3 cans of creamed chipped beef fo
olasank [31]
You can solve this by using the system of equations.
Jan - 4.95 = 2H + 3C
Wayne - 5.45 = 3H + 2C

Use elimination.
-3(2H + 3C = 4.95)
2(3H + 2C = 5.45)

Solve. And you'll get:
-6H + (-9C) = -14.85
6H + 4C = 10.9

Cross out -6H and 6H because they cancel out. And you're left with:
-9C = -14.85
4C = 10.9

Add -9C with 4C, and -14.85 with 10.9.
-5C = -3.95

Divide each side with -5.
C = $0.79

Now to figure out what H is, just substitute the C in one of the equations with 0.79.
5.45 = 3H + 2(0.79)
5.45 = 3H + 1.58
-1.58            -1.58
3.87 = 3H
3.87/3 = 3/3(H)
1.29 = H

Finished!
7 0
3 years ago
Read 2 more answers
Jean wrote two correct variable expressions to represent the phrase “the quotient of a number and 3.”
Pie
The two variable expressions that describe the quotient (division) would be n/3 or n(division symbol)3
3 0
3 years ago
Read 2 more answers
If the spray paint costs approximately $1.50 per foot of coverage, how much should the coach budget for the spray paint?
torisob [31]

Since the cost of the spray paint is approx $1.50,

The range for the cost of the spray paint is'

\pm0.05\text{ dollars}

Therefore, the coach budget should be between,

\begin{gathered} \text{for }+0.05\text{ dollars,} \\ =1.5+0.05=1.55\text{ dollars and,} \\ \text{for -0.05 dollars,} \\ =1.5-0.05=1.45\text{ dollars} \end{gathered}

Hence, the budget of the coach should be between $1.45 and $1.55.

4 0
1 year ago
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