What is the equation of the following line written in general form? (The y-intercept is -1.)
A 2x + y - 1 = 0
B -2x - y - 1 = 0
C 2x - y - 1 = 0

Answer:

30 students

Step-by-step explanation:

you have a ratio, and an unknown amount, so set up a proportion

[tex]\frac{2}{3} = \frac{x}{18}[/tex] I used x because the amount of boys is unknown

so then, cross multiply

(so do 3 times x, and 2 times 18)

[tex]3x=36[/tex]

then divide both sides by 3 to get x by itself, and you get

[tex]x=12[/tex]

this means there are 12 boys in the class. because the problem is asking for the total number of students, add 12 and 18 (the number of boys and girls).

you get 30, so there are 30 students in her class.

Answer:

a. observational study

Step-by-step explanation:

An observational study is one in which the researcher seeks to discover the effect of a disease or treatment without interference on those who are affected or not affected by it. Observational studies could be of two types namely; the case-control, and the cohort study. The research given above is a cohort study because it compares a group of people born in the same time period and checks for the presence of a disease that could be linked to the vaccinations administered at birth.

A case-control study compares those affected by the disease to those not affected by it. An experimental study assigns the participants to groups and there is a control or placebo group. After this, the results from the groups are compared.  

The mass per cup for the objects will be 320g and 272g respectively.

Mass simply means the weight that an object contains.

The mass of a teapot and 4 cups is 1,280 grams. The mass per cup will be:

= Mass / Number of cups

= 1280 / 4

= 320g

The mass of the same teapot and 10 cups is 2,720 grams. The mass per cup will be:

= 2720 / 10

= 272g

Learn more about mass on:

brainly.com/question/19385703

#SPJ1

Answer:

1.55 or 31/20 which is 1 11/20 gallons

Step-by-step explanation:

Answer:

Did you try this is a piece of cake

Step-by-step explanation:

Answer:

-2x^2-20x-46

Step-by-step explanation:

-2(x^2)-20x-46

-2(x^2) -2(10x)-46

-2(x^2)-2(10x)-2(23)

-2(x^2+10x)-2(23)

-2x^2-20x-46

Answer: D. The Number of months of internet service

The Answer:

63° degrees

Answer:

63° degrees

Step-by-step explanation:

Answer:

the second one would be the correct anwser i think.

Step-by-step explanation:

Answer:

e

Step-by-step explanation:

e

Answer:

[tex]yes \: \\ PRIME \: AND \: CO-PRIME \: NUMBERS \: are \: the \: SAME [/tex]

Answer:

0.755 Yuan

Step-by-step explanation:

You already know it's going to be less than 1  since 1 yuan is 13.2455 yen.

Chinese Yaun : Japanese Yen

                     1 : 13.2455

divide both by 13.2455 to work out 1 Japanese Yen

           0.0755 : 1

Multiply both 10

              0.755: 10

Answer: 832

Step-by-step explanation:

Below is how I solved it

You do 2 times 6, then 2 times 10, then 6 times 50, then 50 times 10. Make a table!

2 x 6 = 12

2 x 10 = 20

6 x 50 = 300

50 x 10 = 500

500 + 300 + 20 + 12 = 832

52 x 16 = 832

Answer:

47

Step-by-step explanation:

just keep adding by 5

M = (  (x1 + x2) / 2  ,  (y1 + y2) / 2 )

(9, 0) = (  (x1 + 12) / 2  ,   (y1 + 3) / 2)

Break up this formula into two equations.

(x1 + 12) / 2 = 9           and          (y1 + 3) / 2 = 0

Solve for x1 and y1 from the equations.

another way to explain it

the formula for finding the midpoint of a segment given the coordinates of its endpoints is:

((x1+ x2)/2, (y1 +  y2)/2   {Average of the x coordinates, average of the y coordinates}.

For this problem we know the coordinates of the midpoint along with one of the endpoints.

So the x coordinate of the midpoint (9) must equal (12 + x2)/2.

That is:  9 = (12 + x2)/2  Solve for x2. Follow a similar pattern to find the y coordinate of the unknown endpoint.

and another way

The x's are 3 apart and the y's are 3 apart. The other endpoint is (9 - 3, 0 - 3), or (6,-3).

hope this helped you have a good day this was ez

Answer: 19 XD

Step-by-step explanation: u add

Answer:

i think its false :>

Step-by-step explanation:

Answer: multiplication property of equality

Step-by-step explanation:

in the equation 2(x-3)=18

it should be 2x-6=18

x=12 by the way

[tex]\begin{gathered} \: \: \: \footnotesize{\boxed{\begin{array}{c|c}\boxed {\bf {Statement}} & \boxed {\bf {Reason}} \\ \\\\ \text{2(x-3)=18} & \sf{Given} \\\\ \text{ 2x-6=18} &\sf{Multiplication ~property~ of~ equality } \\\\ \text{2x=18+6}& \sf \\\\ \text{2x=24} &\sf{Addition~ property~ of~ equality }\\\\ \text{x=24/2} & \sf{Division~ property ~of ~equality }\\\\ \text{X=12} & \sf \end {array}}}\end{gathered}[/tex]

Answer:

18

Step-by-step explanation:

.2x15=3

3+15=18

Answer:

18$

Step-by-step explanation:

THE ANSWER IS B

A: 1/3*6,000,000 does NOT equal 18,000,000

C: However, 2/5*6,000,000 does equal 2, yet, $2.4*10^3 is a FALSE STATEMENT and it doesn't make sense

D: Not ALL statements are correct

Answer:

4/35 pounds

Step-by-step explanation:

4/7 ÷ 5 is the same as

[tex]\frac{4}{7} * \frac{1}{5}[/tex]

4x1/7x5

= 4/35

Answer:

4/35

Why?

To figure this out I had to make 5 into a fraction. 5/1. Now, I had to find a common denominator. 35. From there I changed both fractions, divided them, and got my answer.

Answer:

I think its 38 however i could be wrong

Step-by-step explanation:

Self explanatory i just added them

**Put as brainliest if you wish**

Answer:

139yds

Step-by-step explanation:

area of a rectangle is length time width

9(11)=99

area of a triangle is length times width divided by 2

8(10) divided by 2=40

99+40=139

Answer:

9/1 x 3/1

Step-by-step explanation:

Answer:

there will be 9

Step-by-step explanation:

Answer:

1.15t

Step-by-step explanation:

I think

Answer:

I'm not sure what the question is but an example question could be

"Take 5 away from 3."

For this you would go to three on the number line and then move left five gaps. You would land on -2

another example: "Add 4 to -3."

For this, you would go to -3 on the number line, and then move right 4 times. you would land on 1.

Answer:

4.5

Step-by-step explanation:

just move 1 1/2 steps to the left

Answer:

x = 7

Step-by-step explanation:

Answer:

x = 7

Step-by-step explanation:

We have to solve for [tex]x[/tex] so we isolate the value of x in the expression.

[tex]2x + 2x - 9 = 19[/tex]

[tex]2x + 2x - 9 + 9 = 19 + 9[/tex]

[tex]2x + 2x = 28[/tex]

[tex]4x = 28[/tex]

[tex]\frac{4x}{4} = \frac{28}{4}\\[/tex]

[tex]x = 7[/tex]

Answer:

The probability that the sample mean would differ from the population mean by greater than 33 millimeters is 0.0174

Step-by-step explanation:

[tex]Mean = \mu = 145 mm[/tex]

Standard deviation =[tex]\sigma = 7[/tex]

We are supposed to find the probability that the sample mean would differ from the population mean by greater than 3 millimeters

[tex]P(|x-\mu|>33)=1-P(|x-\mu|<3)\\P(|x-\mu|>33)=1-P(-3<|x-\mu|<3)\\P(|x-\mu|>33)=1-P(\frac{-3}{\frac{\sigma}{\sqrt{n}}}<\frac{|x-\mu|}{\frac{\sigma}{\sqrt{n}}}<\frac{-3}{\frac{\sigma}{\sqrt{n}}})\\P(|x-\mu|>33)=1-P(\frac{-3}{\frac{7}{\sqrt{31}}}<\frac{|x-\mu|}{\frac{\sigma}{\sqrt{n}}}<\frac{-3}{\frac{7}{\sqrt{31}}})\\P(|x-\mu|>33) =1-P(-2.38<z<2.38)\\P(|x-\mu|>33) =1-(P(z<2.38)-P(z<-2.38))\\[/tex]

Using Z table

                   = 1-(0.9913-0.0087)

                  =0.0174

Hence  the probability that the sample mean would differ from the population mean by greater than 33 millimeters is 0.0174

Answer

B

Step-by-step explanation: