I need help please!!

Complete Question

We have a total of 420 students. 2 times 3 times the number of girls is equal to 2 times the number of boys how many girls and how many boys

Answer:

The number of boys = x = 315 boys

The number of girls = y = 105 girls

Step-by-step explanation:

Let

The number of boys = x

The number of girls = y

We have 420 students

2 times 3 times the number of girls is equal to 2 times the number of boys

x + y = 420..... Equation 1

2 × 3y = 2x

6y => 2x

x => 6y/2 = 3y

We substitute 3y for x in Equation 1

3y + y = 420

4y = 420

y =>420/4

y => 105

Solving for x

x = 3y

x = 3 × 105

x = 315

Therefore,

The number of boys = x = 315 boys

The number of girls = y = 105 girls

Answer:

up 12 over 1

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

12 is before x and the b or y-intercept is 0

Hope it helps have a good day

Answer:

The Wildebeest

Step-by-step explanation:

I’m guessing

Answer:

Correct answer is a

Step-by-step explanation:

Answer:

Equivalent / Equal

Step-by-step explanation:

Answer:

i got 15.1

Step-by-step explanation:

Answer:

Equation: 2x + 1 = 9x - 13

There are two chairs in each row.

Step-by-step explanation:

Looking at the problem, we see that Hue can form two rows of chairs with 1 left over, or 9 rows if she gets 13 more. With that information we can create the equation 2x + 1 = 9x - 13. Now let's solve for x.

2x + 1 = 9x - 13

What we can do first is subtract 9x from both sides. This is done so all of the variables are on one side. Thus that becomes...

2x + 1 - 9x = -13

Now, combine -9x and 2x to get -7x.

-7x + 1 = -13

Now subtract 1 from both sides. This is done so we solve for x directly.

-7x = -13 - 1

Subtract -1 from -13 to get -14.

-7x = -14

Now divide both sides by -7.

x = -14/-7

Divide -14 by -7 to get 2. Remember, dividing two negatives gives you a positive!

x = 2

With that, the equation is solved. There are 2 chairs in each row.

Answer:

(-7, -2)

Step-by-step explanation:

Answer:

a) 40

b)1h30m

Step-by-step explanation:

a) from graph

b) from 10:00 to 11:30 is 1h30min

Answer:

35 different groups of 3 runners can be selected

Step-by-step explanation:

Here, we want to simply calculate the number of 3 runners that can advance in a race from a total of 7

What we want to do here is to simply get different groups of 3

So, we have it that we simply want to know the number of different ways we can select 3 from a total of 7

We can simply use combination for this;

We have the general combinatorial as;

nCr = n!/(n-r)!r!

With respect to this particular question, n = 7 and r = 3

So we have;

7C3 = 7!(7-3)!3! = 7!/(4)!3! = 35

Answer:

0.4375

Step-by-step explanation:

Answer:

Step-by-step explanation:

distance = [tex]\sqrt{(7-3)^2+(-2-2)^2[/tex] = [tex]\sqrt{16+16} = \sqrt{32}[/tex], which is approximately 5.65685

Answer:

5.7

Step-by-step explanation:

[tex] \sqrt{(2 + 2) {}^{2} + (3 - 7) {}^{2} } = \sqrt{ {4}^{2} + {4}^{2} } = \sqrt{16 + 16} = \sqrt{32} = 4 \sqrt{2} = 5.7[/tex]

Answer:

1/81

Step-by-step explanation:

You just tap the calculator

Answer:

4

Step-by-step explanation:

2x-y=8 ---> y= 8-2x

substitute y=8-2x into x+2y=4

x + 2(8 - 2x) = 4

x + 16 - 4x = 4

-3x = -12

x = -12/-3

x = 4

substitute x=y into y=8-2x

y = 8 - 2(4)

y = 8 - 8

y = 0

therefore,

x+y= 4+0

4

btw i like ur jimin pfp besty :)

Answer:

v = 135.5 cm³

Step-by-step explanation:

v = 1/3bh = 1/3(16)(25.4) = 135.5 cm³

Answer:

The gaming system was on sale for 20% off

Step-by-step explanation:

165 - 132 = 33

Now, we need to find what percent 33 is of 165.

(33/165) x 100 = 20%

Answer:

yes

Step-by-step explanation:

counterclockwise move it to the quadrant

directly to the left ,which is the second quaurter    that means the x value only become negtive

Answer:

90 degree rule

(x,y)=(y.-x)

Step-by-step explanation:

Answer:

(a+b)^2+(a-b)^2=2(a^2+b^2)

expanding:

a² + 2ab + b² + a² -2ab + b² = 2a² + 2b²

2a² + 2b² = 2a² + 2b²

Answer:

with what?

Step-by-step explanation:

Answer:

-12 degrees

Step-by-step explanation:

the graph

Answer:

16 bicycles

Step-by-step explanation:

Answer:

X= -243

Used Math.way

Answer:

A) perimeter = 3 + 3 + 8 + 8 = 22 units

B) area = 3 x 8 = 24 units²

Step-by-step explanation:

9514 1404 393

Answer:

  B  reflected over y, translated up

Step-by-step explanation:

The left-right reversal means there was a reflection over a vertical line. The only one among the offered choices is the y-axis.

If the lines are reflected over the y-axis, the points on the y-axis don't move. The intercepts would still be 2 and 5 after the reflection.

However, the y-intercepts have moved up 3 units to 5 and 8.

  Lines g and h were reflected over the y-axis and translated up 3 units.

Answer:

g= - 3x/x-2

Step-by-step explanation:

The number of miles that Tatutm walk her dog in 5 days is given by: Option B: 10/3 (in miles)

Let we have to add two fractions as:

[tex]\dfrac{a_1}{b_1} + \dfrac{a_2}{b_2}[/tex]

Then we will find Lowest Common Multiple (LCM) of [tex]b_1[/tex] and  [tex]b_2[/tex]. That will help to make the denominators same.

Once the denominators become same, the numerators can add up directly, giving us the final result of addition.

For this case, we're given that:

For 5 days, the total distance her dog walked = 2/3 + 2/3 + 2/3 + 2/3 + 2/3

Since denominators are same, thus:

[tex]\dfrac{2}{3} + \dfrac{2}{3} + \dfrac{2}{3} + \dfrac{2}{3} + \dfrac{2}{3} = \dfrac{2+2+2+2+2}{3} = \dfrac{10}{3}[/tex]

We could've easily done it as: 2/3 + 2/3 + 2/3 + 2/3 + 2/3 = 5 times 2/3 = [tex]5 \times \dfrac{2}{3} = \dfrac{5 \times 2}{3} = \dfrac{10}{3}[/tex]

Thus, the number of miles that Tatutm walk her dog in 5 days is given by: Option B: 10/3 (in miles)

Learn more about fraction addition here:

https://brainly.com/question/17544795

Answer:

484

Step-by-step explanation:

484=22^2

Answer:

6

Step-by-step explanation:

Find out how many boys makeup the class.

100% = 40

1% = 40 ÷ 100 = 0.40

40% = 0.40 x 40 = 16

Find 25% of the class.

25% = 0.40 x 25 = 10

40 - 25 = 15% of the boys wear shirt jacs.

16 - 10 = 6