All categories

2 years ago

Let x and y be inversely related such that y = 2 when x = 5. Find y when x = 15

Mathematics

2 answers:

amm18122 years ago

8 0

Answer:

y=2/3

Step-by-step explanation:

first make the equation to interpret the question

x=k/y

find the value of k, which is a constant

when x=5 and y=2

5=k/2

k=10.

hence, find y when x=15

x=k/y

x=10/y

15=10/y

cross multiply

15y=10

divide both sides by 15

y=10/15

y=2/3

Arturiano [62]2 years ago

5 0

Answer:

y would be 6

Step-by-step explanation:

Because 5 x 3 would be 15

then you would do 2 x 3 would be 6

You might be interested in

The product of (3 − 4i) and____is 25.

LiRa [457]

$(3-4i)(a+bi)=25\qquad\text{use FOIL method}\\\\(3)(a)+(3bi)+(-4i)(a)+(-4i)(bi)=25+0i\\\\3a+3bi-4ai-4bi^2=25+0i\\\\3a+3bi-4ai-4b(-1)=25+0i\\\\3a+3bi-4ai+4b=25+0i\\\\(3a+4b)+(3b-4a)i=25+0i\\.\qquad\qquad\qquad\qquad\Downarrow\\\\3a+4b=25\ and\ 3b-4a=0\\\\3b-4a=0\qquad\text{add 4a to both sides}\\\\3b=4a\qquad\text{divide both sides by 3}\\\\b=\dfrac{4}{3}a\qquad\text{substitute it to the first equation}\\\\3a+4\left(\dfrac{4}{3}a\right)=25\\\\3a+\dfrac{16}{3}a=25\qquad\text{multiply both sides by 3}$

$9a+16a=75\\\\25a=75\qquad\text{divide both sides by 25}\\\\\boxed{a=3}\qquad\text{put the value of a to}\ b=\dfrac{4}{3}a:\\\\b=\dfrac{4}{3}(3)\\\\\boxed{b=4}\\\\Answer:\ \boxed{(3-4i)\underline{(3+4i)}=25}$

6 0

3 years ago

Tom, Brad, Angela, and Mona went to a theater. In how many different ways can they sit on four adjacent seats in a line in the t

vladimir2022 [97]

Answer:

Step-by-step explanation:

4x4 = 16

5 0

3 years ago

16 divided by 1 and 7/9

stellarik [79]

Answer:

Alright well the Answer to this question is

9 Hope this helps :)

Step 1: Convert to mixed number 1 7/9 into an improper fraction first by multiplying the denominator, by the whole number

Step 2: Then add the numerator, to get the new numerator. Place the New numerator over the old denominator

16 divided by 16 and 9

To divide by fraction, multiply by it's reciprocal 16(9/16)

Cancel the common factor of 16, then simplify 1/1 9/1 which gives u

9 Hope all this helps :)

Step-by-step explanation:

8 0

3 years ago

What is -3(3y-7)=21-9y

Nina [5.8K]

Answer:

the equation is equivalent, y is any number

Step-by-step explanation:

-3(3y-7) = 21-9y

-9y + 21 = 21 - 9y

-9y = -9y

y=y

any number will satisfy y=y

6 0

3 years ago

If using the method of completing the square to solve the quadratic equation x^2+8x+37=0, which number would have to be added to

Feliz [49]

Answer:

The numbers are --> x = -4 + √21 i and x = -4 — √21 i

See the attachment for my step-by-step explanation

(solution is in red box)

6 0

3 years ago