a class has 28 students the ratio of girls to boys is 4:3 how many girls are in the class

Answer:

1/4

Step-by-step explanation:

because when u add the demical u get the answer b

Answer:

Step-by-step explanation:

1. The probability that your mail is delivered before 2 pm is 0.9, so the probability that the mail is delivered at 2 pm or after 2 pm (so not before 2 pm) is 1-0.9=0.1.

Remark: 0.9=9/10=90/100=90%, and 0.1 is 10%

2. Probability of the mail being delivered before 2 pm for 2 consecutive days is  

3. take a look at the picture attached, the tree diagram is another method we could use.

Answer:

.81

Step-by-step explanation:

I have acellus too and this is the correct answer. I can't explain it very well. Sorry!

Answer:

50°

Step-by-step explanation:

As we know that the opposite angles of parallelogram are equal so

< ADC = < ABC

< ABC = 38° +12°

< ABC = 50°

Hope it will help :)

Answer:3:3:1

Step-by-step explanation:divide by 3

7) 65%

8) 5%

9) 19 pencils

10) 30 questions

7)20 - 7 = 13

13/20= 0.65

0.65= 65%

8) 40 - 38 = 2

2/40= 0.05

0.05 = 5%

9) 0.38 times 50 = 19

10) i just did 30 divided by 27 and got 90%

Answer: 80 cm

Step-by-step explanation:

2.4 divided by 3 is 0.8

To convert m to cm multiply by 100

100 x 0.8 = 80

Answer:

Each piece of ribbon will be 80 cm or 0.8m

Step-by-step explanation:

Hope this helps!

Answer:

12

Step-by-step explanation:

diameter is just radius times 2

hope this helps!

please mark me brainliest! thanks!

Answer:

two distinct real solutions

Answer:

the first one is b)

Step-by-step explanation:

the first one is B. bc x= 6 or x= -6

Answer:

5x^4

Step-by-step explanation:

Just subtract the exponent values because coefficient is same

Answer:

5x x (x-1) x (x + 1) x (x^2 + 1)

Step-by-step explanation:

5x x (x^4 - 1)

5x x (x^2-1) x (x^2+1)

Answer:

5x x (x-1) x (x + 1) x (x^2 + 1)

Answer:

x=51/5

Step-by-step explanation:

Add 61 on both sides

You'll have 5x=51

So now 51/5 is your answer.

Answer:

16/5

Step-by-step explanation:

|5x - 6| = -10

5x -6 = 10

5x = 10+6 = 16

x = 16/5

Answer:

option B

Step-by-step explanation:

option B is the correct answer of this question.

plz mark my answer as brainlist plzzzz if you get it right .

Answer:

I'm going with option A  

Step-by-step explanation:

Answer:

81.5

Step-by-step explanation:

Answer:

81.5

Step-by-step explanation:

Hope this Helps!

Answer:

The slope of the line is [tex]\frac{5}{2}[/tex]

Step-by-step explanation:

Hi there!

We are given the following points: (-2, 4) and (0, 9)

We want to find the slope (m) of these 2 lines, and the problem asks us to use the slope formula

The slope formula is given as [tex]\frac{y_2-y_1}{x_2-x_1}[/tex], where [tex](x_1, y_1)[/tex] and [tex](x_2, y_2)[/tex] are points

We have everything we need to calculate the slope, but let's label the values of the points to avoid any confusion.

[tex]x_1=-2\\y_1=4\\x_2=0\\y_2=9[/tex]

Now substitute these values into the formula to find the slope.

m=[tex]\frac{y_2-y_1}{x_2-x_1}[/tex]

m=[tex]\frac{9-4}{0--2}[/tex]

Simplify.

m=[tex]\frac{9-4}{0+2}[/tex]

Add (or subtract) the numbers together

m=[tex]\frac{5}{2}[/tex]

The slope of the line is [tex]\frac{5}{2}[/tex]

Hope this helps!  

See more on finding the slope from 2 points here: https://brainly.com/question/26738734

Answer:

Im not entirely sure but I think its C. 7 to 9

9514 1404 393

Answer:

  34.2 cm

Step-by-step explanation:

Hopefully, you understand that the length of 2 beads is 2 times the length of 1 bead. Extending this to 18 beads, we hope you understand that the length of 18 beads is 18 times the length of 1 bead.

The length of the 18-bead bracelet will be ...

  18×1.9 cm = 34.2 cm

The length of Marlene's bracelet is 34.2 cm.

_____

Maybe you've never been given as "step by step" for the problem solving process.

Step 1: Set aside your math anxiety and turn on your brain. (The number at the top of the answer is intended to help you do that.)

Step 2: Read the problem statement, interpreting it according to your experience in the real world and your knowledge of English words and sentence structure.

Step 3: Identify what the problem statement is telling you.

Step 4: Identify what the problem statement is asking you.

Step 5: Apply your knowledge of real-world relationships and math relationships to determine how the asked-for information is related to the given information.

Step 6: Use logical reasoning, and/or math symbols to write any down any relationships (equations or inequalities or diagrams) that need further manipulation to achieve the desired answer.

Step 7: Solve those equations, logic problems, geometry diagrams, whatever, using the math relationships you have learned.

Step 8: Relate the solution(s) you found to the question that is being asked. (This may require additional steps.) Note that this is what is being done in the bold statement at the end of the answer above.

Answer:

2

Step-by-step explanation:

When it comes to like terms, they have to end with the same symbol A.K.A variables, exponents, and numbers.

1 + 9 + 3u

There are two terms, constants and variables, constant being 1 and 9 while variable being 3u.

Answer:

iliterallydontknowfigureitoutyourself

Answer:

x = 19.25

Step-by-step explanation:

The diagonal of a rhombus bisects opposite angles and opposite angles are congruent.  

So, 2x - 1 is the measure of the third angle of the triangle

Therefore, 2x - 1 + 2x - 1 + 4x + 28 = 180 since the sum of the measures of the angles of a triangle is 180

8x + 26 = 180

8x = 154

x = 19.25

Answer:

ERSEYHEFUHEFYUBREHFBHRBVYICRWHBG

Step-by-step explanation:

Answer: $7.56

Step-by-step explanation:

Answer:

A.188.4cm^3

Step-by-step explanation:

3.14 times 4 times 15

Answer:

angle 1= 30 degrees

angle 2= 120 degrees

angle 3= 30 degrees

Step-by-step explanation:

A triangle is equal to 180 degrees so first step is to subtract 120 to get the total of your two missing angles

180-120=60

and since your two missing angles are equal to each other you can divide by 2 and you get your two missing angles

60 / 2 = 30

Answer:

Step-by-step explanation:

y=3(4)²+1

 =48+1

 =49

Answer:

The output is 49

Step-by-step explanation:

If the input is 4, then x = 4.

Replace x with 4 and you have the equation:

3(4)^2 + 1 = 49

Because Y is the output, and Y = 49, the output is 49

Answer:

4

Step-by-step explanation:

10/100=0.1

1% = 0.1

0.1*40= 4

Answer:

113.1

Step-by-step explanation:

A = πr²

A = π (6)²

A = π (36)

A = 113.09 = 113.1

Answer:

I think its 15

Step-by-step explanation:

25 + 25 = 50

So 15 + 15 = 30

Answer:

For, 250 messages the plans cost the same. Under 250 messages, plan A is cheaper.

Step-by-step explanation:

Giving the following information:

Plan A:

Fixed costs= $40

Variable cost= $0.2

Plan B:

Fixed cost= $40

I assume that we have to determine the indifference point, where the two plans cost the same.

First, we need to establish the total cost equations

Plan A= 20 + 0.2x

Plan B= 70

x= number of messages

Now, we equal both formulas and isolate x:

20 + 0.2x = 70

0.2x= 50

x= 250

For, 250 messages the plans cost the same. Under 250 messages, plan A is cheaper.