kx+3y=7; (1,-k)

**Answer:**

k = -7/2

**Step-by-step explanation:**

You want the **k-value** so that the **point (1, -k) **is on the **line kx+3y=7**.

The point will be on the line when its coordinates make the equation true. Using (x, y) = (1, -k), we have ...

k(1) +3(-k) = 7

-2k = 7 . . . . . . . . simplify

** k = -7/2** . . . . . . . divide by -2

The value of k = [tex]\frac{-7}{2}[/tex] so the point is on the** line** kx+3y=7

A line is an endlessly long object without breadth, depth, or curvature in **geometry**. Thus, despite the fact that they can exist in two, three, or higher dimensional environments, lines are **one-dimensional **things. The term "line" can also refer to a line segment that has two locations that serve as its ends in daily life.

given

the point of the line = ( 1 ,-k )

the line = kx + 3y = 7

the coordinates make the equation true when its points are on the line

so putting the values of x and y in equation of line

k( 1 ) + 3 ( -k ) = 7

k - 3k = 7

-2k = 7

k = [tex]\frac{-7}{2}[/tex]

The value of k = [tex]\frac{-7}{2}[/tex] so the point is on the line kx+3y=7

To know more about **line** visit:-

https://brainly.com/question/2696693

#SPJ1

I want to prove that (2tanx)/(sec^2x)=sin2x.

**Answer:**

**Step-by-step explanation:**

[tex]LHS = \frac{2 tan x}{Sec^{2} x}\\\\= 2tan x * \frac{1}{Sec^{2}x}\\\\= 2*\frac{Sinx }{Cos x}*Cos^{2}x\\\\= 2Sin x *Cos x\\= Sin 2x[/tex]

Find the values of the variables and the lengths of the sides of the kite.

**Answer: since you didnt answer mine.**

**Step-by-step explanation:**

Chow do I solve 6w - 6 = 54

**Answer:**

w = 10

**Step-by-step explanation:**

6w - 6 = 54

6w = 54 + 6

6w = 60

w = 60/6

w = 10

Tell what whole number you can substitute for x in the following list so the numbers are ordered from least to greatest. 1/x, x/5,70%

**Answer:**

hmmm................chupapu

solve the equestion 2x³+3x²_3x=2

**Answer:**

**2**

**Step-by-step explanation:**

**For Example, To complete the square when a is greater than 1 or less than 1 but not equal to 0, factor out the value of a from all other terms.
**

**
**

**For example, find the solution by completing the square for:
**

**
**

**2x2−12x+7=0
**

**a≠1,a=2 so divide through by 2
**

**
**

**22x2−122x+72=02
**

**which gives us
**

**
**

**x2−6x+72=0**

Your answer is x2-6x+72=0

I’m stuck on this problem helpp

The 3rd one which is c

The ration of girls to boys is 7:8. If there are 140 girls, how many boys are there?

**Answer:**

160

**Step-by-step explanation:**

140 divided by 7 equals 20, then you times the answer by 8, which you get 160.

A major credit card company is interested in whether there is a linear relationship between its internal rating of a customer’s credit risk and that of an independent rating agency. Thecompany collected a random sample of 200 customers and used the data to test the claim that there is a linear relationship. The following hypotheses were used to test the claim.

The test yielded a t -value of 3.34 with a corresponding p -value of 0.001. Which of the following is the correct interpretation of the -value?

a. If the alternative hypothesis is true, the probability of observing a test statistic of 3.34 or greater is 0.001.

b. If the null hypothesis is true, the probability of observing a test statistic at least as extreme as 3.34 is 0.001.

c. If the null hypothesis is true, the probability of observing a test statistic of 3.34 or greater is 0.001This answer is incorrect.

d. If the alternative hypothesis is true, the probability of observing a test statistic at least as extreme as 3.34 is 0.001.

e. If the null hypothesis is true, the probability of observing a test statistic of 3.34 is 0.001.

**Answer:**

C

**Step-by-step explanation:**

The test produced, a **t-value** of **3.34** and a **p-value** of **0.001** as a result. The **possibility** of seeing a **test statistic** at least as extreme as **3.34** is **0.001**; the proper reading of the **p-value** is different if the **alternative hypothesis** is true.

p-value **= 0.001**

**t = 3.34**

Therefore, the final answer is "**Option d**".

Find out more information about the **p-value** here:

brainly.com/question/14723549

A rectangular flower garden in Samantha's backyard has 140 feet around its edge. The width of the

garden is 30 feet.

What is the length of the garden?

The length of the garden is

feet.

**Answer:**

40 feet

**Step-by-step explanation:**

140=2×(30+x) /:2

70=30+x /-30

40=x

A student determined the value of x as shown. Explain the students error. (Click on photo and NO ABSOLUTELY NO LINKS)

**Answer:**

Answer is in the link below- jkjk

**Step-by-step explanation:**

It's a right angle so it can only add to 90 degrees, not 180

find the difference of 13 2/5 and 3 3/4

**Answer:**

9 13/20

**Step-by-step explanation:**

PLEASE HELP!!!

FIRST ONE TO ANSWER GETS BRAINLEST!!!

Which graph represents the solutions of the inequality k > 11?

**Answer:**

B)

**Step-by-step explanation:**

k > 11

Since the sign is > that means it's an OPEN circle

Since the sign is > that means it's going to the RIGHT

Find the measure of the angle indicated (x). Round to the nearest tenth Show your work to support your answer

**Answer:**

Karen, this type of question is such a tricky question, there is a lot of things that you just have to remember for these. Also, this type of question is asked a lot on brainly, you are in good company :P This also makes me wonder if math teachers are just REALLY BAD at teaching this.. hmmm Something is up with this type of problem b/c I have answer 100s of these type on here.. they are tricky. soooo...

**Step-by-step explanation:**

1st ,

Use SOH CAH TOA to recall how the trig functions fit on a triangle

SOH: Sin(Ф)= Opp / Hyp

CAH: Cos(Ф)= Adj / Hyp

TOA: Tan(Ф) = Opp / Adj

with the above info, we can solve your triangle :P not meant to sound "wrong" .. anyway

look for the info you are given and what you want to find... and match that to one of the 3 formulas. after you've done this a few 100 times.. you'll just remember the above formulas. :D

sooo I see that we want to find that angle ∅ and we know two of the sides and that this is a right triangle.. which means we can use the above formulas on this triangle. So we know the adjacent side and the opposite side, to the angle, soo lets use TOA

Tan(∅) = Opp / Adj

Tan(∅) = 4 / 13

now the algebra gets a little tricky here.. but it's just using the inverse function of the Tan to find the angle .. it's just going backwards with the function is all.. nothing to see here... move along.. :D

take the inverse Tan function ( arcTan) on both sides... sooo

∅ = arcTan( 4 /13 ) ( this will find the angle, but make sure your calculator is set to degrees.. and not radians )

∅ = 17.1027...°

So, now we know that angle ∅

SOH CAH TOA is super helpful for this kind of triangle problem :)

find the area of the polygon to the nearest square inch

9514 1404 393

**Answer:**

120 square inches

**Step-by-step explanation:**

The formula for the area is ...

A = (1/2)Pa

where P is the perimeter and 'a' is the apothem. The perimeter of this octagon is 8 times the side length.

A = (1/2)(8×5 in)(6 in) = 120 in²

**The area of the octagon is 120 square inches**.

When you need a fraction of a number, likeſ of 9, how do you find out how much you need?

A

You add the fraction to the number.

B

You subtract the fraction from the number.

с

You divide the number by the fraction.

D

You multiply the number by the fraction,

**Answer:**

D) Multiply

**Explanation:**

The word "of" usually means you multiply.

The answer for this question is A!!! I believe tell me what the answer was if I got it wrong :))

Find both the number of combinations and the number of permutations for the given number of objects.

15 objects taken 7 at a time

**Answer:**

First, if we have a set of K elements, such that are ordered as:

{x₁, x₂, ...}

The total number of permutations for the K elements can be found in the next way.

For the first element in the set, we have K options.

For the second element in the set, we have (K - 1) options (because we already choose one)

For the third element we have (K - 2) options, and so on.

The total number of permutation is equal to the product between the numbers of options for each position's element, then the number of permutations for K elements is:

permutations = K*(K - 1)*(K - 2)*....*2*1 = K!

Now suppose that we have a set of N elements, and we want to make groups of K elements.

The total number of different combinations of K elements is given by the equation:

[tex]C(N, K) = \frac{N!}{(N - K)!*K!}[/tex]

In this case we have 15 objects (then N = 15) and we take 7 at the time (Then K = 7)

Where we need to take in account the number of combinations and also the permutations for each combination.

Then the total number of different sets is:

C(15*7)*7!

First, the total number of combinations will be:

[tex]C(15,7) = \frac{15!}{(15 - 7)!7!} = \frac{15!}{8!*7!} = \frac{15*14*13*12*11*10*9}{7*6*5*4*3*2*1} = 6,435[/tex]

So we have 6,436 combinations, and each one of these combinations has 7! permutations.

permutations = 7! = 7*6*5*4*3*2*1 = 5,040

if we combine these we get:

Combinations*Permutations = 6,435*5,040 = 32,432,400

**Answer:**

7

**Step-by-step explanation:**

alex, bella, cara share £90; work how much each of them have if:

alex has £x

bella has 3 times as much as alex

cara has £10 less than alex

**Step-by-step explanation:**

given,

alex = x

bella = 3x

cara = x - 10

and also given,

[tex]x + 3x + (x - 10) = 90 \\ x + 3x + x - 10 = 90 \\ 5x - 10 = 90 \\ 5x = 90 + 10 \\ 5x = 100 \\ x = 100 \div 5 \\ = 20[/tex]

Given x = £20,

Alex = £x = £20

Bella = £3x = £3x20 = £60

Cara = £(x-10) =£(20-10) =£10

If the perimeter of the triangle is 95 inches, what is the length of each side? n, 3n+8, and 4n+7.

**Answer:**

10, 38, 47

**Step-by-step explanation:**

The perimeter is the sum of the side lengths:

95 = n +(3n +8) +(4n +7)

80 = 8n . . . . . . subtract 15

10 = n

3n+8 = 3(10) +8 = 38

4n+7 = 4(10) +7 = 47

**The lengths of the sides of the triangle are 10, 38, 47**.

HELP! PLZ I need to show work too .

-12.5 - (-12)

**Answer:**

-0.5

**Step-by-step explanation:**

-12.5 - (-12) = -12.5 + 12 (because you distribute the minus sign). Then, when adding you get - 0.5

**Answer:**

**-0.5**

**Step-by-step explanation:**

-12.5-(-12)

-12.5 + 12

-0.5

Miles takes a 350-mile round-trip flight to visit his parents. To qualify for Gold status at Awesome

Airlines, one must fly at least 7700 and less than 12600 miles each year. How many times would Miles

need to visit his parents each year to attain Gold status? Express your answer in interval notation.

**Answer:**

Miles must travel a minimum of 22 times and a maximum of 36 times to achieve Gold status.

**Step-by-step explanation:**

Given that Miles takes a 350-mile round-trip flight to visit his parents, and to qualify for Gold status at Awesome Airlines, one must fly at least 7700 and less than 12600 miles each year, to determine how many times would Miles need to visit his parents each year to attain Gold status, the following calculation must be performed:

7700/350 = X

22 = X

12600/350 = X

36 = X

Thus, Miles must travel a minimum of 22 times and a maximum of 36 times to achieve Gold status.

If DC is about 12 units, what other length(s) can you determine? Please don’t put a link as an answer.

**Answer:**

How is DC 12 units if all the sides are congruent and AB clearly states that it is 9 units long?

Doesnt make sense

In order to play on the 7th grade basketball team you must buy a team uniform. Last year a uniform cost $40, but this year a uniform cost $48. What is the percent of change?

Show your work here:

INCLUDE ANSWER AND TY

**Answer:**

20%

**Step-by-step explanation:**

The uniform cost $8 more than last year.

Last year was $40

Find what percent of 40 is 8.

8/0.4 = 20

the percent change is 20%

Are these ratios equivalent?

28 strikes : 36 balls

7 strikes : 9 balls

**Answer:**

yes

**Step-by-step explanation:**

the ratio of 28 : 36 can be simplifeid by dividing both sides of the ratio by 4.

28/4=7

36/4=9

so the ratio of 28 : 36 is equal to 7 : 9

What were the

prominent primary, secondary and tertiary effects the disaster brought?

Primary effects are the direct result of the natural disaster, such as collapsed buildings and water damage. Secondary effects are the result of primary effects. ... Tertiary effects are the long term effects of natural disasters.

What is the square root of pie?

**Answer:**

The square root of Pi is approximately 1.77245.

**Step-by-step explanation:**

**Answer:**

6/8 is equal to 15/ what? NEED HELP ASAP PLZ will choose brainliest

**Answer:**

No

**Step-by-step explanation:**

It is not equel

no

explanation:

not equal

explanation:

not equal

Find the slope of the line graphed.

A) -4/5

B)-5/4

C)4/5

D)5/4

Have to use photo to solve.

**Answer:**

The answer is -4/5 C

**Step-by-step explanation:**

what is the slope of the following equation y = -1/2x + 4

**Answer:**

the slope is -1/2

**Step-by-step explanation:**

HELp! WILL GIVE BRANLIEST

**Answer:**

330

**Step-by-step explanation:**

Check all statements that are true.

a. Adding two integers and then taking the remainder produces the same result as taking their remainders first, then adding them, and then applying the remainder operation once more.

b. Saying that a divides b is the same as saying that b is a multiple of a.

c. Adding two integers and then taking the remainder produces the same result as taking their remainders first and then adding them.

d. When you perform division by 5 with remainder, the remainder is an integer from -5 to 5.

e. If an integer a divides a product of two integers b and c, then a must divide b or a must divide c.

f. If an integer divides two numbers, it also divides their difference.

g. If an integer divides two numbers, it also divides their sum.

h. When you perform division by 3 with remainder, the remainder is one of the integers 0,1,2.

i. If a and b are positive integers, and a = bq + r is the decomposition of a given by the division algorithm, then q can be found as the floor of a/b, and then r can be found as r = a - bq.

j. If an integer a divides an integer b, then a also divides any multiple of b.

**Answer:**

a. True

b. True

c. False

d. False

e. False

f. True

g. True

h. True

i. True

j. True

**Step-by-step explanation:**

When the integer divides the two number then their sum is also divisible by that integer. This is also the case in the subtraction when two number are divisible then their difference is also divisible. When there is division by 5 the number not necessarily can be 5 or -5. This statement is not correct.

I need helping finding the length and width of this shape the area is 183.65sqft ? Please help thank you.
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2.5x20 when X = 15?
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