All categories

3 years ago

The ratio of boys to girls in a classroom is 2:5. If there are 70 students in a class. How many of them are girls?

Mathematics

1 answer:

lora16 [44]3 years ago

4 0

The ratio of boys to girls in a classroom is 2:5

Add the two numbers:

2 + 5 = 7

Divide the gotten number by the total amount

70/7 = 10

Multiply each ratio number individually with gotten amount.

10 x 2 = 20

10 x 5 = 50

The ratio of boys to girls is 20:50, with 50 of them being girls.

50 is your answer

hope this helps

You might be interested in

9y -4y+3 if y =7 solve this

BigorU [14]

Plug 7 into each y. 9(7) -4(7) +3
63-28+3
The answer is 38

5 0

3 years ago

Helpppppppppppppppppppppppppp

Firlakuza [10]

Answer:

Option D.

Step-by-step explanation:

==>27

r = 3

which means 9x3 = 27.

6 0

3 years ago

A rectangle has a length of (x + 4) centimeters and a width of 12x centimeters. If the perimeter is 26 centimeters, what is the

mars1129 [50]

Width of rectangle is 8.4 cm

Step-by-step explanation:

Length of rectangle = x+4

Width of rectangle = 12x

Perimeter = 26 cm

We need to find width of rectangle.

The formula used is:

$Perimeter=2(length+width)$

Putting values and finding x first:

$Perimeter=2(length+width)$

$26=2(x+4+12x)$

$26=2(13x+4)$

$26=26x+8$

$26-8=26x$

$26x=18$

$x=\frac{18}{26}$

$x=0.7$

So, value of x is 0.7

Now width= 12x = 12(0.7)

=8.4 cm

So, width of rectangle is 8.4 cm.

Keywords: Perimeter of Rectangle

Learn more about perimeter of rectangle at:

#learnwithBrainly

5 0

3 years ago

The volume, V, of any cube with a side length, s. can be determined using the forma

Tpy6a [65]

Answer:

V=12.167

Step-by-step explanation:

V=s^3

V=2.3x2.3x2.3

V=12.167

Since it is cubic centimeters, then it is written as 12.167cm^2

4 0

3 years ago

Solve for h. -18+7h>12+9h

Evgen [1.6K]

Answer:

$h$

Step-by-step explanation:

$-18+7h>12+9h$

Add 18 to both sides:

$-18+7h+18>12+9h+18$

$7h>9h+30$

Subtract 9h from both sides:

$7h>9h+30$

$-2h>30$

Multiply both sides by -1 and flip the symbol:

$\left(-2h\right)\left(-1\right)$

$2h$

Divide both sides by 2:

$\frac{2h}{2}$

$h$

4 0

3 years ago