There are 18 girls in Mr. Brimley's math class. If 40% of the students are girls, what is the best estimation for the number of boys in the class?

=======================================================

Explanation:

[tex]0.\overline{5}[/tex] means that the 5's go on forever because of that horizontal bar over top. So we can write it as [tex]0.\overline{5} = 0.55555\ldots[/tex]

The three dots indicate it goes on forever following that pattern.

Let

x = 0.55555....

Multiply both sides by 10 to move the decimal point 1 spot to the right

10x = 5.55555....

Notice how both x and 10x involve a decimal number such that we have a string of 5's going on forever. If we subtract the two equations, then 10x-x becomes 9x, while the (5.55555....) - (0.55555....) simplifies to 5. The decimal portions cancel out when we subtract since they line up perfectly. We're effectively subtracting 5-0 when we cross off the decimal portions.

After those subtractions, we're left with 9x = 5 which solves to x = 5/9 when you divide both sides by 9.

Use of a calculator should show that 5/9 = 0.555555.... to help confirm the answer. Your calculator may show the last digit to be a 6 instead of a 5, but this is due to rounding. Ideally you should have a string of infinitely many 5's, but the calculator can only how so many digits.

Answer:

x=0

Step-by-step explanation:

5-9+3x = -10+6

-4+3x = -4

+4 .       +4 (Both sides)

3x = 0

/3    /3 . (divide both sides by 3)

x=0

Answer:

She will get $696 from babysitting in 3 months.

Step-by-step explanation:

58x4 = 232. 232x3= $696.

Answer:

696

Step-by-step explanation:

Answer:

I'm pretty sure its 14/5

Answer:

Yes this is true

Step-by-step explanation:

when ur moving right of the decimal point it goes tenths hundredths and thousandths so yes this is true PLEASE MARK BRAINLIEST ;C

Given:

The length of a rectangle is 3 inches less than three times its width.

The perimeter of the rectangle is 34 inches.

To find:

The dimensions of the rectangle.

Solution:

Let x be the width of the rectangle. Then, the length of a rectangle is 3 inches less than three times its width.

Length of the rectangle = 3x-3

Now, perimeter of the rectangle is

[tex]Perimeter=2(Length + Width)[/tex]

[tex]Perimeter=2(3x-3+x)[/tex]

The perimeter of the rectangle is 34 inches.

[tex]34=2(4x-3)[/tex]

[tex]34=8x-6[/tex]

[tex]34+6=8x[/tex]

[tex]40=8x[/tex]

Divide both sides by 8.

[tex]\dfrac{40}{8}=x[/tex]

[tex]5=x[/tex]

The value of x is 5. So, width of the rectangle is 5 inches.

[tex]Length=3x-3[/tex]

[tex]Length=3(5)-3[/tex]

[tex]Length=15-3[/tex]

[tex]Length=12[/tex]

Therefore, the length of the rectangle is 12 inches and the width of the rectangle is 5 inches.

Answer:

Step-by-step explanation:

X       Y                    X           Y    

0       3                     0           5

1        7                     1              8

2        11                    2           11

3        15                   3          14

4         19                   4            17  

FIRST STEP:

2x + 3x + 5x = 180

10x = 180

x = 18

SECOND STEP:

2*18 = 36

3*18 = 54

5*18 = 90

36:54:90

PLZ MARK AS BRAINLIEST

Answer:

let ratio be 2x,3xand 5x

Step-by-step explanation:

2x+3x+5x=180(sum of interior angle of triangle)

10x=180

x=180/10=18

:.required angle

2x=2×18=36

3x=3×18=54

5x=5×18=90

Answer:

1/ 64

Step-by-step explanation:

1 / 4³ = 1/ 64

hope it helps!

Answer:

4 red beads

Step-by-step explanation:

Answer:

-7

Step-by-step explanation:

-7 + 5 = -2

Can u mark me brainly pleasee???

Answer:

-7

Step-by-step explanation:

give brainliest jayfeather friend me

Answer:

4x + 4

Step-by-step explanation:

1. 6 - 3 = 3 + 1 = 4

2. You keep the 4x.

3. So 6−3+4x+1= 4x + 4.

Answer:

Yes!

The solution to the equation is n = 2

Step-by-step explanation:

Given the equation

[tex]4\left(n\right)-3=-2\left(n\right)+9[/tex]

remove the parentheses

[tex]4n-3=-2n+9[/tex]

Add 3 to both sides

[tex]4n-3+3=-2n+9+3[/tex]

Simplify

[tex]4n=-2n+12[/tex]

Add 2n to both sides

[tex]4n+2n=-2n+12+2n[/tex]

Simplify

[tex]6n=12[/tex]

Divide both sides by 6

[tex]\frac{6n}{6}=\frac{12}{6}[/tex]

Simplify

[tex]n=2[/tex]

Therefore, the value of n = 2.

Hence,

Yes!

The solution to the equation is n = 2

Answer:

Step-by-step explanation:

m∠A=132°

b≈25.5

c≈18.7

Answer:

So the scale factor would be the length of the new rectangle divided by the length of the corresponding side for the original rectangle. So the scale factor is 1/2. Note: If you're going from a bigger shape to a smaller one, you know that the scale factor must be less than 1.

Step-by-step explanation:

Answer:

14 servings

Step-by-step explanation:

Step 1

We convert 7 pounds to ounces

0.0625 pound = 1 ounce

7 pounds = x

Cross Multiply

0.0625x = 7

x = 7/0.0625

x = 112 ounces

Step 2

The number of 8 ounce servings she can give to her dog is calculated as:

8 ounces = 1 serving

112 ounces = x servings

Cross Multiply

8 × x = 112 × 1

8x = 112

x = 112/8

x = 14 servings

Therefore, the number of 8 ounce servings she can feed her dog is 14

Answer:

2n+10

Step-by-step explanation:

you just distribute the -2 and you get -14+2n+4 and then add and you'll get 2n+10

if you are solving for the variable n then you would want your equation like this 2n+10=0

next you would put the 10 on the other side of the equation and have 2n=-10

finally you would divide by 2 and get n=-5

Answer:

G is correct

H is correct

M is correct

K is 131

Step-by-step explanation:

Angles in a straight line add up to 180 degrees

Answer:

g: 43

h: 137

m: 49

K: 131

Step-by-step explanation:

i got it right

Answer:

well, there is no image but it could be..

4z,z+3z,2z+2z

Answer:

b

Step-by-step explanation:

Answer:

The correct answer is 4

Step-by-step explanation:

hope this helps

Step-by-step explanation:

(8×2,8×3)

(16, 24)

............

Answer:

I am pretty confident that the answer is the last one

Step-by-step explanation:

I'm not really sure how to explain though lol.

Hope  this helps!

Answer: i assume you're looking for F, if so F = -16

Step-by-step explanation:

you would start by adding +24 to each side of the equation, giving you f/4 = -4

then, you would multiply each side of the equation by 4, giving you f = -16

Answer:

75%

Step-by-step explanation:

9 ÷ 12 = 0.75

0.75 = 75%

Answer:

The answer is (x+3)(x-15)