i’ve been on this question for 22 minutes please help me

Answer:

Step-by-step explanation:

6x + 10y = 12

-20x - 10y = 30

-14x = 42

x = -3

4(-3) + 2y = -6

-12 + 2y = -6

2y = 6

y = 3

(-3, 3)

Answer:

addition property of equality, subtraction property of equality, simplified, division property of equality and simplified.

Step-by-step explanation:

Answer:

1  given

2  Combining like terms  

3    addition property of equality

4   simplification

5   division property of equality

6   simplification

Step-by-step explanation:

In step 2, the like terms of x and x were combined and simplified to -2x.

In step 3, adding 7 to both sides of the equation to isolate the variable term is justified by the addition property of equality.

In step 4, the constants are combined on each side for simplification.

In step 5, dividing both sides of the equation by -2 to isolate the variable is justified by the division property of equality.

In step 6, simplification results in the solution of x = 4.

Answer:

1

Step-by-step explanation:

The equation would look like this: ¾ ÷ ¾

When dividing fractions, you always flip the second one to receive the reciprocal, so the equation now looks like this: ¾ ÷ 4/3

If you cross simplify, the answer will end up being 1.

Answer:380000

Step-by-step explanation:

Answer:

Hi, I'm the new kid in class and I like cars AND 380000

Step-by-step explanation:

Answer:

19+a

Step-by-step explanation:

Answer:

no

Step-by-step explanation: 1:2 is like half of the whole so basically what i mean is the first number has to be half of the second number for example 2:4 or 4:8

Answer:

No

Step-by-step explanation:

If these ratios were equivalent the second would read 14:24. So if the first ratio was 1:3 the second would read 14:42.

Answer:

it is 10 to the power of 6, so your answer is 6

Step-by-step explanation:

Answer:

the paracium never dies because it keeps on reproducing

Step-by-step explanation:

the paracium lets say it starts as 1

and then taht 1 divides inti

1/2 and 1/2 and that 1/2 turns into 1

and it keeps on dividing and multiplying

Step-by-step explanation:

total value would be 20,000

place value is hundreds of thousands

that's my opinion cuz I didn't fully understand it but I tried thanks

Find the LCM

3 = 3 times 1

5 = 5 times 1

15 = 5 times 3

25 = 5 times 5

Because they have one 5 and one 3 in common...

5 times 3 times 5 = 75.

She has 75 coins.

Answer:

Independent Variable- size of aquariums

Dependent variable - number of surviving fish

Controls: nil

Step-by-step explanation:

In every experiment, the independent variable is manipulated and its effect on the dependent variable is observed as certain factors are kept constant.

In this study, the independent variable is the size of the aquariums. As this factor is manipulated, the number of surviving fish (dependent variable) changed accordingly. There was no mention of a control group in the experiment.

However, temperature, amount of food and type of food were held constant for all the experimental groups.

Complete Question

Answer:

a

  [tex]SE  = 0.66}[/tex]

b

[tex] -3.29 <  \mu_1 - \mu_2 <  -0.70[/tex]  

Step-by-step explanation:

From the question we are told that

  The sample size is  n  = 60

   The first sample mean is  [tex]\= x _1  =  8[/tex]

    The second sample mean is   [tex]\= x _2  =  10[/tex]

    The first variance is  [tex]v_1 =  0.25[/tex]

    The first variance is  [tex]v_2 =  0.55[/tex]

Given that  the confidence level is 95% then the level of significance is 5% =  0.05

Generally from the normal distribution table the critical value  of  [tex]\frac{\alpha }{2}[/tex] is  

   [tex]Z_{\frac{\alpha }{2} } =  1.96[/tex]

Generally the first standard deviation is  

     [tex]\sigma_1 =  \sqrt{v_1}[/tex]

=>   [tex]\sigma_1 =  \sqrt{0.25}[/tex]

=>   [tex]\sigma_1 =  0.5[/tex]

Generally the second standard deviation is

     [tex]\sigma_2 =  \sqrt{v_2}[/tex]

=>   [tex]\sigma_2 =  \sqrt{0.55}[/tex]

=>   [tex]\sigma_2 =  0.742 [/tex]    

Generally the first standard error is

     [tex]SE_1  =  \frac{\sigma_1}{\sqrt{n} }[/tex]

      [tex]SE_1  =  \frac{0.5}{\sqrt{60} }[/tex]

     [tex]SE_1  =  0.06[/tex]

Generally the second standard error is

     [tex]SE_2  =  \frac{\sigma_2}{\sqrt{n} }[/tex]

      [tex]SE_2  =  \frac{0.742}{\sqrt{60} }[/tex]

     [tex]SE_2  =  0.09[/tex]

Generally the standard error of the difference between their mean scores is mathematically represented as    

      [tex]SE  =  \sqrt{SE_1^2 + SE_2^2 }[/tex]

=>     [tex]SE  =  \sqrt{0.06^2 +0.09^2 }[/tex]

=>     [tex]SE  = 0.66}[/tex]

Generally 95% confidence interval is mathematically represented as  

      [tex](\= x_1 -\= x_2) -(Z_{\frac{\alpha }{2} } *  SE) <  \mu_1 - \mu_2 <  (\= x_1 -\= x_2) +(Z_{\frac{\alpha }{2} } *  SE)[/tex]

=> [tex](8 -10) -(1.96 *  0.66) <  \mu_1 - \mu_2 <  (8-10) +(Z_{\frac{\alpha }{2} } *  0.66)[/tex]  

=>  [tex] -3.29 <  \mu_1 - \mu_2 <  -0.70[/tex]  

Answer:

1 bathroom to 4 theaters

Step-by-step explanation:

Answer:

√36, √17, 0.33333...., 1.2874....

Step-by-step explanation:

irrational numbers - a number that cannot be exactly expressed as a ratio of two integers.

Answer:

No

Step-by-step explanation:

since the magnitude of xy ≠ zw,

|x-y| = xy = |52-121|= 69, |z-w| = zw = |-21-25| = 46

69 ≠ 46

Answer: y - 4 = 1/5 * (x+3)

Step-by-step explanation:

Answer:

The correct answer is 7 weeks 34 WPM

Step-by-step explanation:

The number of weeks and words typed will be D. 7weeks;34 WPM

Based on the information given, the formula to calculate my words per minutes = 13 + 3n

The formula to calculate my friend's words per minutes = 20 + 2n

Therefore, we'll equate both equations together and this will be:

13 + 3n = 20 + 2n

Collect like terms

3n - 2n = 20 - 13

n = 7.

Therefore, the WPM will be:

= 13 + 3n

= 13 + 3(7)

= 13 + 21

= 34

The number of weeks and words typed will be 7weeks;34 WPM

Read related link on:

https://brainly.com/question/18314140b

Answer:

r = -3

Step-by-step explanation:

-3r + 4(-3r +2) = 53

-3r + -12r + 8 = 53

                -8     -8

-3r + -12r = 45

-15r = 45

Divide both sides by -15 to get

r = -3

Answer:

r = -3

Step-by-step explanation:

expand 4(-3r+2)

= -12r+8

add similar variables

= -15r+8=53

subtract 8 from both sides

= -15r+8-8=53-8

simplify

= -15r=45

divide 45 by -15

= -3

Answer:

C. Check the intersecting lines with the corner of a piece of paper to ensure the lines create 90° angles. Took the test just now and got it right

Step-by-step explanation:

Answer:  The correct answer is:  " 98 " .

______________________________________

Step-by-step explanation:

______________________________________

In this case, "degrees of freedom" , or "df":

  "df" = n - 1 ;  

  in which:  "n = the numeric value of the sample size."

   Given:  "n = 99" ;  we can plug that value into the formula:

         "df" = n - 1 = 99 - 1 = 98 .

______________________________________

Answer:

2

Step-by-step explanation:

Answer:

a+2

Step-by-step explanation:

Answer:

the answer is 3a

Step-by-step explanation:

first you have to think about  pemdas which means you have to do parenthises first so 2a+4=6a and then 6a multiplied by 1/2 wich eqauls 3 and then you add the a and now you have you have your final answer.

Answer:

b,c,d

Step-by-step explanation:

cus I said so and it's right

7 is prime so the least common denominator is 7 times 2 times 5 which is 70.

Answer:

Step-by-step explanation:

From the picture attached,

From ΔABC,

m∠B = 180° - (m∠C + m∠A)

        = 180° - (90° + 32°)

        = 180° - 122°

        = 38°

Now we have to find the trigonometric ratio of BC and AB from ΔABC,

Since, sinθ = [tex]\frac{\text{Opposite side}}{\text{Hypotenuse}}[/tex]

sin(32°) = [tex]\frac{BC}{AB}[/tex]

[tex]\frac{BC}{AB}=0.53[/tex]

Therefore, ratio of BC and AB represents the "sine of angle A".

Answer:

False

Step-by-step explanation:

Although it is true that y=-2 is a horizontal line, it does not have an undefined slope. Because it is a horizontal line, it has a slope of 0.

9514 1404 393

Answer:

  a) GH or HG

  b) KL

  c) YZ or ZY

  d) EF

Step-by-step explanation:

A segment or line can be named by naming two points on it in any order. The points naming a line segment are its end points.

A ray is named by first naming its end point, then any other point on the ray.

a) GH or HG

b) KL

c) YZ or ZY

d) EF

Answer:

The average amount of debt John collected per month is $20/ month

Step-by-step explanation:

Given;

total debt collected by John, = $70.00

total number of months, = 3 1/2 months  = 7/2 months

The average amount of debt John collected per month is given by;

[tex]Average \ amount \ per \ month = \frac{Total \ amount \ of \ debt}{total \ number \ of \ months} \\\\Average \ amount \ per \ month =\frac{70}{1} *(\frac{2}{7} )\\\\Average \ amount \ per \ month = \$20 \ / month[/tex]

Therefore, the average amount of debt John collected per month is $20/ month

Answer:

44 feet/hour

Step-by-step explanation:

6mi/month(5280ft/1mi)(1month/30days)(1day/24hrs)

Assuming the month has 30 days, object moves at 44 feet/hour. You want all the units to cancel till you get the ones you need, in this case feet/hr.