All categories

2 years ago

if 40% of the students in the class are boys , and if there are 18 girls in the class , then how many students are in the class?

1 answer:

5 0

30

60% were girls so you put this as a ratio

60/100= 18/x

You calculate x to determine the total number which would equal 30.

You might be interested in

Which expressions are equivalent to -2y-8+4y

katrin2010 [14]

Answer:

2y-8

-Step-by-step explanation:

2y +4y = 2y

2y - 8

8 0

2 years ago

Can you guys plz help ASAP

sasho [114]

The answer is D. They both had the same proportion.

Hope this helps!!!

7 0

2 years ago

Please help me with this

Ne4ueva [31]

Answer:

Option c

Step-by-step explanation:

A system of equations are given to us. And we need to solve them . The given system is

$\begin{cases} y = 2x - 3\dots 1 \\ y = x^2 - 3\dots 2 \end{cases}$

We numbered the equations here . Now put the value of equation 1 in equation 2 that is substituting y = 2x - 3 in eq. 2 .

$\implies y = x^2 - 3 \\\\\implies 2x - 3 = x^2 - 3 \\\\\implies x^2 - 2x = 0 \\\\\implies x(x-2) = 0 \\\\\implies\red{ x = 0 , 2 }$

We got two values of x as 0 & 2 . Alternatively substituting these values we have ,

$\implies y = 2 x - 3 \\\\\implies y = 2(0)-3 \qquad or \qquad y = 2(2)-3 \\\\\implies y = 0-3 \qquad or \qquad 4 - 3 \\\\\implies \red{ y = -3 , 1 }$

Thefore the required answer is ,

$\red{Option\:c} \begin{cases} (0,-3) \\ (2,1) \end{cases}$

4 0

2 years ago

Read 2 more answers

Which ordered pair will be the solution for the function y = 12 - x?

EastWind [94]

The answer should be (6,6), you can plug 6 in for both x and y in order to solve the function.

y=12-x
(6)= 12 - (6)
6=6

7 0

3 years ago

Help Please!<br> I only have 52 minutes and I really don’t understand this

Paraphin [41]

Answer:

the first answer

Step-by-step explanation:

5 0

2 years ago