All categories

2 years ago

I'm Mrs.Moores class, the ratio of boys to girls is 4:6. If there are 30 students in the class, how many girls are in class?

Mathematics

1 answer:

liubo4ka [24]2 years ago

5 0

Answer:

Step-by-step explanation:

6×5=30

6*4=24

you have to find more then half which would be 3:6 so it's more then 15 but less then 30

You might be interested in

Find each product by distributing.<br> (2a - 5)(a? – 2a + 1)

Westkost [7]

Answer:

A = 1 , 1 , $\frac{5}{2}$

Step-by-step explanation:

Given equation as

(2a -5) (a² -2a +1) = 0

Or, (2a - 5) (a - 1 )² = 0

Or, (2a - 5) (a - 1) (a - 1) = 0

So, value of a are :

2a - 5 =0, a - 1 =0, a- 1 = 0

i.e a = $\frac{5}{2}$

and a = 1 , 1

Answer

5 0

3 years ago

The following proof shows an equivalent system of equations created from another system of equations. Fill in the missing reason

lianna [129]

Multiplication property of equality

8 0

2 years ago

Determine the area of the triangle.

coldgirl [10]

Answer:

396.8

Step-by-step explanation:

Multiply them to each other.

3 0

2 years ago

Read 2 more answers

Use partial fraction expansion to evaluate: LaTeX: \int\frac{x-1}{x^2+3x+2}dx ∫ x − 1 x 2 + 3 x + 2 d x a. LaTeX: -2\ln\left|x+1

ohaa [14]

$\frac{x-1}{x^2+3x+2}\\\frac{x-1}{(x+1)(x+2)}\\\frac{x-1}{(x+1)(x+2)}=\frac{A}{x+2}+\frac{B}{x+1}\\x-1=A(x+1)+B(x+2)\\\\\text{ Let } x=-1 \text{ then } -2=A(0)+B(-1+2) \text{ which means } B=-2\\\\\text{ Instead of choose } x \text{ to be -1, let's now set it equal to -2 to find } A\\\\-3=A(-1)+B(-2+2)\\-3=-A\\A=3\\\\ \text{ So your integral becomes } \\\int \frac{3}{x+2} dx+\int \frac{-2}{x+1} dx\\3 \ln|x+2|-2\ln|x+1|+C\\\\or\\-2\ln|x+1|+3\ln|x+2|+C$

8 0

2 years ago

The projected world population (in billions of people) t years after

MA_775_DIABLO [31]

Answer:

y = 5 e^r * t

Let y be the population in billions and t the value of elapsed years

7 = 5 e^r * t is the equation being used where t = 15

7/5 = e^r * t

ln 7/5 = r * t taking ln of both sides

r = .336 / 15 = .0224

y = 5 e^(.0224 t) is then our equation

Check - suppose you want y at 2020

y = 5 e^(.0224 * 20) would be the equation

y = 5 e^.449 = 7.83 billion - seems to be a reasonable answer

4 0

2 years ago

Read 2 more answers