Solve for y. -15y – -14y = -9

Answer:

If x=6 and y=5 and we are to find y when x=3.

it will be 6=5,3=y....

5×3=6×y.

y=15/6=2.5 or 2 whole number 1/2.

This is the answer I hope it helps

Answer:

Step-by-step explanation:

distance covered in 9 hours = 828 km

therefore, distance covered in 1 hour = 828 / 9

= 92 km

Hope this helps

plz mark as brainliest!!!!!

Answer:

Step-by-step explanation:

Hello,

A train cover 828 km in 9 hours what distance will it covers in 1 hour

828 km => 9 hours

? km => 1 hour

= 1 x 828 / 9

= 92 km

Answer:

15 years.

Step-by-step explanation:

We have the equation:

20000 = 10000(1 + 0.048)^t     where t is the number of years.

1.048 t = 20000/10000 = 2

Taking logs:

t ln 1.048 = ln 2

t = ln 2 / ln 1.048

t = 14.78

Answer:

1/4 OF FLOUR IS USED FOR EACH CAKE

Step-by-step explanation:

[tex]\frac{3}{4} X 6[/tex]=4.5

[tex]\frac{4.5}{6}[/tex]=0.75

Answer:

[tex]Sum=4*[\frac{n^2-1}{n^2}][/tex]

For n=10:

Sum=3.96

For n=100:

Sum=3.9996

For n=1000:

Sum=3.999996

For n= 10000:

Sum=3.99999996

Step-by-step explanation:

Formula:

[tex]\sum_{k=1}^n \frac{12k(k-1)}{n^3}[/tex]

Rearranging the above formula:

[tex]\sum_{k=1}^n \frac{12}{n^3}*k(k-1)\\\sum_{k=1}^n \frac{12}{n^3}*(k^2-k)[/tex]            Eq (1)

According to summation formula:

[tex]\sum_{k=1}^n\ k= \frac{n(n+1)}{2}\\ \sum_{k=1}^n\ k^2= \frac{n(n+1)(2n+1)}{6}\\[/tex]

Putt these in Eq (1), and we will get:

[tex]=\frac{12}{n^3}[\frac{n(n+1)(2n+1)}{6}-\frac{n(n+1)}{2}]\\Taking\ n\ as\ common\\=n*\frac{12}{n^3}[\frac{(n+1)(2n+1)}{6}-\frac{(n+1)}{2}] \\=\frac{12}{n^2}*[\frac{(n+1)(2n+1)}{6}]-\frac{12}{n^2}*[\frac{(n+1)}{2}] \\=\frac{2*(n+1)(2n+1)}{n^2}-\frac{6(n+1)}{n^2}\\[/tex]

Taking [tex]2(n+1)[/tex] as common:

[tex]=2(n+1)*\frac{2n+1-3}{n^2} \\=(2n+2)*\frac{2n-2}{n^2}\\=\frac{4n^2-4}{n^2}[/tex]

After more simplifying,

[tex]Sum=4*[\frac{n^2-1}{n^2}][/tex]

Now ,for n=10:

[tex]Sum=4[\frac{(10^{2})-1}{10^{2}}]\\Sum=3.96[/tex]

For n=100:

[tex]Sum=4[\frac{(100^{2})-1}{100^{2}}]\\Sum=3.9996[/tex]

For n=1000

[tex]Sum=4[\frac{(1000^{2})-1}{1000^{2}}]\\Sum=3.999996[/tex]

For n=10000:

[tex]Sum=4[\frac{(10000^{2})-1}{10000^{2}}]\\Sum=3.99999996[/tex]

Answer:

(-7,14,21,42)

Step-by-step explanation:

(-7,-4,2,14,21,34,42)

-7 = 7*-1  yes

14 = 7*2  yes

21 = 7 *3  yes

42 = 7*6  yes

Answer:

[tex]\huge\boxed{(-7,14,21,42)}[/tex]

Step-by-step explanation:

Let's check which multiples are of 7:

-7 => 7 × -1   [A multiple of 7]

-4 => Not a multiple of 7

2 => Not a multiple of 7

14 => 2 × 7    [A multiple of 7]

21 => 3 × 7    [A multiple of 7]

34 => Not a multiple of 7 [Doesn't come in the table of 7]

42 => 6 × 7   [A multiple of 7]

So, the multiples of 7 are:

(-7,14,21,42)

Answer:

-45

Step-by-step explanation:

Answer:

((−5)(−3))(−3)

=−45

hope this was helpful!

Answer:

2009 data set is most homogeneous

Step-by-step explanation:

As per coefficient of variation, which is around 5% for the year 2009 and around 20% for the year 2010 we can state that the data set for the year 2009 is most homogeneous

Homogeneous means similar, it can be observed on the graph as well that the data for the year 2009 is less variant

Hope it answers your question.

The closest answer I got was D. Add 4,585.92+3,278, because he initial deposited the money into the bank.

Answer:

R= $1,133/100(7+1)

=234.86 RS.

Step-by-step explanation:

percentile rank is the percentage of scores that shall be equal to or less than a given value. The percentage falls within the range of 0 to 100. To find out the percentile rank, we used the formula:

R= P/100(N+1). Where R is the percentile rank, p is a percentile and N number of items.

Let for round trip airfare; the percentile is $1,133. And the number of days for the trip is 7.put these values in the formula, we have

R= $1,133/100(7+1)

=234.86 RS.

Answer:

120

Step-by-step explanation:

you would do length times width equals area. First you would multiply 8 by 15 which would give you 120 square feet. So Maragaret would be covering 120 square feet with paint

Answer:

a)   PQ = 12.2

b)   M (-1, 2.5)

Step-by-step explanation:

a) PQ

use pythagorean PQ = [tex]\sqrt{(6+4)^2 +(6+1)^2}[/tex]

PQ = [tex]\sqrt{149}[/tex] = 12.2

b) Midpoint

Mx = (-6 + 4)/2 = -1

My = (6 + -1)/2 = 2.5

Answer:

[tex]\Huge \boxed{\mathrm{a) \ 12.21}} \\\\\\\\ \huge \boxed{\mathrm{b) \ -1, \ \frac{5}{2}}}[/tex]

[tex]\rule[225]{225}{2}[/tex]

Step-by-step explanation:

We can use Pythagorean theorem to solve for the length of PQ.

[tex]PQ=\sqrt{10^2 +7^2 }[/tex]

[tex]PQ=\sqrt{149} \approx 12.2066[/tex]

The length of PQ is approximately 12.21.

We can find the midpoint with the midpoint formula:

[tex]\displaystyle \frac{x_1 + x_2 }{2}, \ \frac{y_1+y_2}{2}[/tex]

[tex]\displaystyle \frac{-6+4 }{2}, \ \frac{6+-1}{2}[/tex]

[tex]\displaystyle \frac{-2 }{2}, \ \frac{5}{2}[/tex]

[tex]\displaystyle -1, \ \frac{5}{2}[/tex]

[tex]\rule[225]{225}{2}[/tex]

Answer:

x = 1

Step-by-step explanation:

Given

30 = 5(x + 5) ← divide both sides by 5

6 = x + 5 ( subtract 5 from both sides )

1 = x

Answer:

Step-by-step explanation:

30 = 5(x + 5) ← divide both sides by 5

6 = x + 5 ( subtract 5 from both sides )

x=1

Answer:

A.

Step-by-step explanation:

All you have to do is convert all those fractions to 20.

So 3/4 will be 15/20, 3/10 would be 6/20, 4/5 would be 16/20 and 1/2 would be 10/20. It could be a or b. Does it say select all possible answers?

Answer:

Step-by-step explanation:

Since angles R and S are supplementary angles it means that the sum of their angles add up to 180°

To find R we must first find x

To find x , add angles R and S and equate them to 180

That's

R + S = 180

80 - x + 3x - 30 = 180

2x + 50 = 180

2x = 180 - 50

2x = 130

Divide both sides by 2

x = 65°

From the question

R = 80 - x

But x = 65°

Substitute the value of x into the expression

That's

R = 80 - 65

We have the final answer as

Hope this helps you

Answer:

quadrilateral,parallelogram

Step-by-step explanation:

A quadrilateral is a four-sided polygon.

A parallelogram is a quadrilateral with two sets of parallel sides, much like a rectangle, but with no right angles.

hope it helps I tried my best

Answer:

Step-by-step explanation:

Standard error of the mean is expressed as shown below.

SE = S/√n where;

S is the standard deviation

n is the sample suze

Given parameters

Standard deviation = $23.90

sample size = 13

Required

Standard error of the mean for this distribution.

Substituting the given value into the formula we have;

SE = 23.90/√13

SE = 23.90/3.6056

SE = 6.6286

Hence the approximate standard error of the mean for this sample is 6.63

Answer:

Step-by-step explanation:

(500 x 4) + (50 x 4) + (4 x 2)

2000 + 200 + 8

2208 is the solution

Answer:

[tex]x = -\frac{5}{7}, 2[/tex]

Step-by-step explanation:

To solve this equation, we need to simplify it down first. To do this, we must apply the distributive property to each term.

[tex]7x(x-2) + 5(x-3) = -5\\\\(7x^2 - 14x) + (5x - 15) = -5[/tex]

Now we can combine like terms.

[tex]7x^2 - 9x - 15 = -5[/tex]

Add 5 to both sides:

[tex]7x^2 -9x - 10 = 0[/tex]

We can see that this is a quadratic equation, in the form [tex]ax^2 + bx + c[/tex]. To solve for x, we must use the Quadratic Formula, which is [tex]\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex], where a is 7, b is -9, and c is -10.

Substitute inside the equation:

[tex]\frac{-(-9)\pm\sqrt{-9^2-4\cdot7\cdot-10}}{2\cdot7}\\\\\frac{9\pm\sqrt{81+280}}{14}\\\\\frac{9\pm19}{14}\\\\(9+ 19)\div14 = 2\\\\(9 - 19)\div14 = -\frac{5}{7}[/tex]

Hope this helped!

Answer:

Brianliest!

Step-by-step explanation:

simplify

7x^2-14x+5x-15 = -5

7x^2 - 9x - 10

x= 1

x = -0.7142857143

Answer:

its c The additive inverse is positive, while the multiplicative inverse is negative.

Step-by-step explanation:

The additive inverse is positive, while the multiplicative inverse is negative.

a relationship between two expressions or values that are not equal to each other is called 'inequality.

A relation is a function if it has only One y-value for each x-value.

The given function is f(x) = –(x – 3)²(x + 2)

Function equal to minus x minus three whole square times of x plus two.

as x>3, the values of x will be positive.

So the additive inverse is positive, while the multiplicative inverse is negative.

Additive inverse simply means changing the sign of the number and adding it to the original number to get an answer equal to 0.

A multiplicative inverse or reciprocal for a number x, denoted by 1/x.

Hence, the additive inverse is positive, while the multiplicative inverse is negative.

To learn more on Inequality click:

https://brainly.com/question/28823603

#SPJ2

Answer:

The null hypothesis is  [tex]H_o: \mu_1 = \mu_2[/tex]

The  alternative hypothesis is  [tex]H_1 : \mu_1 \ne \mu_2[/tex]

The test statistics is  [tex]t = -1.667[/tex]

Step-by-step explanation:

From the question we are told that

  The first sample size is  [tex]n_1 = 12[/tex]

   The  first sample  mean is  [tex]\= x_1 = 79.8[/tex]

    The first standard deviation is  [tex]\sigma _1 = 8.8[/tex]

   The second sample  size is  [tex]n_2 = 17[/tex]

    The  second  sample  mean is  [tex]\= x_2 = 85.2[/tex]

    The second  standard deviation is  [tex]\sigma _2 = 8.3[/tex]

The null hypothesis is  [tex]H_o: \mu_1 = \mu_2[/tex]

The  alternative hypothesis is  [tex]H_1 : \mu_1 \ne \mu_2[/tex]

Generally the test statistics is  mathematically represented as  

                 [tex]t = \frac{\= x_ 1 - \= x_2 }{ \sqrt{ \frac{\sigma_1^2 }{n_1 } +\frac{\sigma_2^2 }{n_2} } }[/tex]

   =>          [tex]t = \frac{ 79.8 - 85.2 }{ \sqrt{ \frac{8.8^2 }{12} +\frac{ 8.3^2 }{17} } }[/tex]

=>                [tex]t = -1.667[/tex]

Answer:

-19

Step-by-step explanation:

10-3-2+4

= -3 -2 +4 +10

= -10

Answer:  3.6

Step-by-step explanation:

To find the distance, find the difference in the x and y coordinates then square them to add them and find the square root of that number you get after you added it.

x coordinate:  5 - 7 = -2

y coordinate:   5-2 =  3

2^2 + 3^2 = c^2   where  c is the length

4 + 9 = c^2

13 =c^2

c = [tex]\sqrt{13}[/tex]  

c= 3.605  rounded to the nearest tenth  is 3.6

Julio's hourly rate is going to be $14.4 per hour

Answer:

(-3,0) and (1,0)

Step-by-step explanation:

The x-intercepts of the function that is graphed above are the points where the line of the graph intercepts or crosses the y-axis. At that point, y is always 0.

Thus, the line of the graph intercepts the x-axis at x = -3, when y = 0 (-3, 0), and also at x = 1, when y = 0 (1, 0).

Therefore, the x-intercepts of the graphed function are (-3,0) and (1,0).

Answer:

Three times a number is 3n.  Nine less than that is 3n-9.  This is NOT the same thing: 9-3n.  Subtraction is not commutative.  If n was 1, for example, 3(1)-9=-6.  Looking at the other expression, 9-3(1)=6.  6 and -6 are definitely not the same number.  So be careful how you set up your expression.  Our inequality then would be

Step-by-step explanation:

Answer:

10 and 11

Step-by-step explanation:

Let the first integer be x.

Then the next one, since it's consecutive, must be (x+1).

The two equals 21. Thus:

[tex](x)+(x+1)=21[/tex]

Combine like terms:

[tex]2x+1=21[/tex]

Subtract 1 from both sides:

[tex]2x=20[/tex]

Divide both sides by 2:

[tex]x=10[/tex]

So, the first integer is 10.

And the second integer is 10+1=11.

Answer:

10 , 11

Step-by-step explanation:

The sum of two consecutive integers is 21.

Let the least of the integer be signified by the variable x.

Consecutive means "directly after", which means the other integer would be: x + 1

Set the equation:

(x) + (x + 1) = 21

Simplify. Combine like terms:

x + x + 1 = 21

(x + x) + 1 = 21

2x + 1 = 21

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

First, subtract 1 from both sides:

2x + 1 (-1) = 21 (-1)

2x = 21 - 1

2x = 20

Next, divide 2 from both sides:

(2x)/2 = (20)/2

x = 20/2

x = 10

Plug in 10 for x in the equation:

(x) + (x + 1) = 21

10 + (10 + 1) = 21

10 + 11 = 21

21 = 21 (True)

The two numbers are 10, 11.

~

[tex]{Option: A}[/tex]

What is a unit rate?

=> A rate that has a 1 as its denominator.

Answer:

A rectangle has_four_sides that are straight lines, _parallel_ and _equal_ opposite sides, and angles of [tex]90^o[/tex]_.

Step-by-step explanation: