Mathematics High School

If y ∝ [tex]\frac{1}{x}[/tex] and y = 4 when x = 2.5, find :


(a) y when x = 20

(b) x when y = 5

Answers

Answer 1

Answer:

Step-by-step explanation:

Y = k1/x

4 = k 1/2.5

2.5 x 4 = k

10 = k

Now using this equation we will find the other answers

A) find y when x = 20

Y = k 1/x

Putting values

= 10(1/20) = 1/2 = 0.5

B) find x when y = 5

Y = k 1/x

Putting values

5 = 10 1/x

5x = 10

x = 10/5 = 2

Related Questions

PLEASE HELP WITH QUESTIONS 6, 7, 8, AND 9 ONLY. ASAPPPP​

Answers

go to yt and watch one I bieleve it should be able to help you

Help me please Help me please Help me please Help me please Help me please Help me please Help me please Help me please Help me please Help me please Help me please Help me please Help me please Help me please

Answers

Answer:

(1,0)

Step-by-step explanation:

0, Y-axis is the vertical (up and down) axis. The point isn’t moved up or down, therefore it’s zero. Would appreciate brainliest!

Isaiah is preheating his oven before using it to bake. The initial temperature of the oven is 75° and the temperature will increase at a rate of 10° per minute after being turned on. What is the temperature of the oven 17 minutes after being turned on? What is the temperature of the oven tt minutes after being turned on?

Answers

Answer:

12750 is the answer... god bless

QUICK whoever gets the correct answer here’s a brainliest

Answers

Answer:

HI

Step-by-step explanation:

The daily cost of renting a car is $25.00 plus $0.30 per mile driven. What is the cost of renting the car for one day and driving at 75 miles?

Answers

Answer: The cost of renting the car for one day and driving at 75 miles = $ 47.5 .

Step-by-step explanation:

GIven: Daily cost of renting car = $ 25.00 + $0.30 per mile driven

Let x = Total distance traveled ( in miles).

Then total cost of renting (in $)= 25+0.30x

For x= 75 miles

The  total cost of renting (in $)= 25+0.30(75)

=25+22.5

= $47.5

Hence, the cost of renting the car for one day and driving at 75 miles = $ 47.5

PLEASE HELP

Put the following angles into Corresponding, Alternate Interior, Alternate Exterior, or Consecutive;
<14 and<15; <5 and <7; <6 and<12; <5 and <11; <10 and <12; <3 and <13

WILL GIVE BRAINLIEST JUST ANSWER QUICK!!!

Answers

Answer:

so i think you mean:

14

15

5

7

6

2

5

11

10

12

3

13

Step-by-step explanation:

hope this helps!? :D

have a great day/night :)

Answer:

No answer, just to help with a brainly

Determine whether the two expressions are equivalent. If so, tell what property is applied. If not, explain why. 23+15 and 15+23

Answers

Answer:

Yes, they are equivalent

Step-by-step explanation:

Remember equivalent means equal

23 + 15 and 15 + 23 are the same numbers, you can switch them around by using the commutative property.

23 + 15 = 38

15 + 23 = 38

Joyce uses 3/10 bag of chocolate chips for each batch of cookies she makes. What is the least number of batches Joyce can make if she has to open a second bag of chocolate chips?

Answers

Answer:

6 batches is the least amount.

Step-by-step explanation:

A 4 sided polygon has diagonals that are perpendicular. The adjacent sides are congruent. What is the best name for the polygon?

1. Parallelogram
2. Rhombus
3. Isosceles Trapezoid
4. Kite

Answers

Answer:

A Kite

Step-by-step explanation:

I know, almost 2 years late. It's a kite and I don't know why.

Factor 28+56t+28w, to identify the equivalent expressions.

Answers

Answer:

28(1 + 2t +w)

Step-by-step explanation:

28 + 56t + 28w.

Factor out a 28 from the expression.

28(1 + 2t + w)

-5x-4y=-7 on a graph

Answers

Answer:

Graph is attached below.

Step-by-step explanation:

If you want to solve for the variable x,

x = −4 / 5y + 7 / 5

Spiral Review Elena draws a scale drawing for a garden in her backyard. The scale drawing is 3 inches by 6 inches. The garden will be 12 feet by 24 feet.

What is the scale of the drawing in inches to feet?

Answers

1/4 bc if you take the fraction 3/12 and simply it’s 1/4

Solve the system of equations using elimination, or write “no solutions” or “infinite solutions” where applicable

4x-y = 7

Answers

Answer:

no solutions

Step-by-step explanation:

i guess   im

I rlly need help and the operation bby plssssss help me

Answers

AFE=35 degrees because 180=55+90+x

Answer:

∠ AFE = 35°

Step-by-step explanation:

∠ EFD = ∠ BFC = 55° ( vertically opposite angles )

Since BD is a straight line , then

∠ EFD + ∠ AFE + AFB = 180°, that is

55° + ∠ AFE + 90° = 180

∠ AFE + 145° = 180° ( subtract 145° from both sides )

∠ AFE = 35°

a taxi charges a $3.00 fee per ride plus $1.25 per mile ridden. Jason's fare for a taxi ride was $20.50. Write an equation and solve it to determine the number of miles (m) that Jason rode in the taxi.

Answers

Answer:

14 miles

Step-by-step explanation:

[tex]3 + 1.25x = 20.50\\1.25x = 17.5\\x = 14[/tex]

how many fifths must be added to 6/10 to make a whole​

Answers

Answer:

2/5

Step-by-step explanation:

10/10 = 1 Whole

You need 4/10 to get 1 whole

4/10 is equivalent to 2/5 because when you divide the numerator and denominator by 2 you the 2/5.

Andy participated in a neighbor’s garage sale. He sold 3 items: a picture frame for $8.50, a teapot for $3.75, and a set of 6 cups for $4.75. Andy paid the neighbor 10% of his earnings for allowing him to participate in the sale. What were Andy’s earnings after he paid the neighbor the 10%?

Answers

Answer:

$15.30

Step-by-step explanation:

8.50+3.75+4.75=$17

100-10=90

17x0.90=

15.3

Answer:

$15.3

Step-by-step explanation:

15.3 because if you add up all the earnings and then calculate 10%of 17 you get 1,7. 17-1.7=15.3

What is the slope of this line!

Answers

Answer:

-1/3

Step-by-step explanation:

Slope is rise over run which is -1 over 3

Answer:

-1/3

Step-by-step explanation:

So do rise over run. It goes down 1 and right 3, so the slope os -1/3.

You can also do the change in y over the change in x and use two coordinates.

help me if correct i will mark branliest

Answers

Answer:

c = 17

Step-by-step explanation:

a^2 + b^2 = c^2

= 8*8 + 15*15

= 64 + 225

= 289

= 289 SQUARED

= 17

Answer:

i THINK it is 15. im so so so super sorry if im wrong-have a nice day!

Step-by-step explanation:

Krista spent 6 hours on her homework this weekend. She spent 24 hours
studying for her social studies test and 1 hours on her math homework. The
rest of her time she spent writing a book report. How much time did Krista spend
on her book report?

Pls help

Answers

Answer:

she spent 19 hours on her book report

Step-by-step explanation:

you take 6 hours subtract by 1 hour for math then you get 5 do then 24-5 Is 19

Hope this helps

Hey besties I need someone to answer this

Answers

Answer:

Its the first one y=x3 - 3

Step-by-step explanation:

Answer:

y = x – 3

Step-by-step explanation:

y = x³ – 3 [cubic function]

y = x² – 3 [square function / quadratic]

y = x – 3 [linear function]

y = √x – 3 [square root function]

Pls help!! I promise ill mark brainlest

Answers

Answer:

A

Step-by-step explanation:

Answer:

b) g(x)=lxl+1l

Step-by-step explanation:

200 people buy plane tickets.
92 males buy tickets
30 of the males buy Business tickets
62 females buy Economy tickets
A total of 44 people buy Business tickets.
A total of 60 people buy Premium tickets.
How many males buy Premium tickets?
You must show all your working.

Answers

You can set up a table like this with all the information given and then solve for the blanks. The goal is to solve for male premium.

First, you can see that female business is 44-30=14. Then, you can see that female premium is 62+14+x=108, or x=32. So, because 32 females bought premium and there are 60 total premium, the number of male premium is 60-32=28 male premium tickets.

Help?? Ty!! for the help much love!!

Answers

Your answer is C. :)

Watch the video linked below.

Adding and Subtracting Equations with Algebra Tiles:

Write a 2-3 sentence reflection sharing what you learned from the video.

<< Read Less

Answers

Answer:

To solve an equation first you have to interpret the words / numbers. If it says 5 and a number is 7 then you have to write an equation, such as 5 + n = 7. When you solve it you have to subtract it from both sides.

5 + n = 7

-5.        -5

n = 2

What is 3x = 36 in one step equations

Answers

Answer:

3x12=36

Step-by-step explanation:

I'm pretty sure this is right

I think 12 because 3x12 = 36

Which method may be fastest if both equations are in standard form with the x's and y's lined up?


ANSWER CHOICES:

1) Substitution

2) elimination

3) graphing

Answers

The answer is graphing

Please help! Thank you! :D Giving brainlest

Answers

Answer:

H  ≤  -2.4

Step-by-step explanation:

dark line pointing left at -24

this is the question ​

Answers

Answer:

The first option: As the x-values go to positive infinity, the function's values go to negative infinity.

Step-by-step explanation:

Let's focus on the right part of the graph. Notice that at x = 1, the line is on the negative y-axis. The same thing happens to when we locate x = 2, it still continues to go down approaching negative infinity.

FINND X AND Y PLS LOL ILL MARK BRAINILEST DONT GUESS THO
-2x + 5y = 60
x + 5y = 45

Answers

Answer:

(-5, 10)

Step-by-step explanation:

I used the substitution method.

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