How do you solve direct and inverse proportion questions?

Answer:

y = -1/2 x + 25

The relationship is linear, but it takes some doing.

Step-by-step explanation:

Remark

This is a very interesting problem. I've never seen one quite like it. There is probably a much better way of solving it, but I did not discover it.  

You have to introduce another variable which I labeled as z.

Let time = x

Let distance = y

Let the step away from the starting point = z   which will be the same for x and y. So 18 and 16 the step away from the start is 3.

So as the time increases, the distance decreases.  What we are going to do sort of resembles a parametric relationship.

t starts with 10

x = 10 + 4*(z - 1)   and increases by 4 with each step

d starts with 20 and decreases by 2 with each step

y = 20 - (z - 1)*2

Now solve for z in each of the forgoing equations.

x = 10 + 4z - 4

x = 6 + 4z

x - 6 = 4z

(x - 6)/4 = z

y = 20 - 2z + 2

y = 22 - 2z

y - 22 = - 2z

(y - 22)/-2 = z                    

Since the zs must be kept the same, the left sides are equated

(x - 6)/4 = (y - 22)/-2               Cross multiply

-2(x - 6) = 4(y - 22)                 Remove the brackets.

-2x + 12 = 4y - 88                   add 88 to both sides.

-2x + 100 = 4y                        Switch the sides

4y = - 2x + 100                       Divide by 4

y = -1/2 x  + 25

Now for sure you have to try this.

Let x = 14

y = -1/2 * 14 + 25

y = -7 + 25

y =  18

Try another one

Let x = 22

y = -1/2 * 22 + 25

y = - 11 + 25

y = 14

Those two at least check.

Answer:

Step-by-step explanation:

Answer:

The Notation for each event Not been independent = P( HT ) or P( TH )

Step-by-step explanation:

when A fair coin flipped ; P( H ) = 0.5 and P( T ) = 0.5

Hence when it is flipped twice the possible outcome = 4

= HH , HT , TT, TH

Since Notation for conditional probability = P ( HH )  this shows that each flip is independent

The Notation for each event Not been independent = P( HT ) or P( TH )

Answer: P(H on 2nd flip|H on 1st flip)=P(H on 2nd flip)

Step-by-step explanation:

Answer:

7 1/6

Step-by-step explanation:

Area is length x width

Find area of 1 container:

Area = 5 1/2 x 1 2/3 = 11/2 x 5/3 = 55/6 = 9 1/6 square yards.

Multiply the area on 1 container by total containers (9)

9 1/6 x 9 = 55/6 x 9 = 495/6 = 82 1/2 square yards

The answer is 82 and 1/2 square yards

Answer:

The second one

Step-by-step explanation:

A visual for law of sines can be found below

Sin (an angles) over its opposite side length is equal to sin ( a different angle) over its opposite side length

In the given triangle we are given side length BC and side length AB

we are also given AB's opposite angle  (40)

And we need to find side length BC's opposite angle (A)

That being said we are given enough information to set up an equation using the law of sines

Remember angle A's opposite side length is 16 and the angle that has a measure of 40 degrees' opposite side length is 12

so the equation would look like...

[tex]\frac{sin(40)}{12} =\frac{sin(A)}{16}[/tex]

Answer:

97

Step-by-step explanation:

The perimeter is adding each side together, the equation is 3+33+15+33+3+10

Answer:

8 + [tex]\sqrt{3}[/tex]

Step-by-step explanation:

A complex conjugate is found when the signs differ, but the numerical elements remain the same.

Answer:

y=5x-5

Step-by-step explanation:

we start from -5 and go rise/run so its 5

Answer:

hector's toy

Step-by-step explanation:

it traveled .02 m farther

Answer:

Step-by-step explanation:

Think money

which is more 70 cents or 72 cents?

The answer should be 72 cents.

So .72 - .70 = 0.02

.72 is larger.

Answer:

0.76 or 0.8

Step-by-step explanation:

Answer:

x>15.5

Step-by-step explanation:

x - 10.2 > 5.3

Add 10.2 to both sides

x-10.2+10.2>5.3+10.2

Simplify getting the answer of

x>15.5

Answer:

16.6

Step-by-step explanation:

somtimes you gotta pay attention to you're math teacher

Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Hypotenuse² = Base² + Length²

The height of the building is 32.8 feet

Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

We have,

If you place a 26-foot ladder against the top of a building and the bottom of the ladder is 20 feet from the bottom of the building.

This can be written as,

Hypotenuse = 26 feet

Base = 20 feet

Height = height of the building

Now,

Applying the Pythagorean theorem.

Hypotenuse² = Base² + Length²

26² = 20² + Height²

Height² = 676 + 400

Height² = 1076

Height = √1076

Height = 32.8 feet

Thus,

The height of the building is 32.8 feet

Learn more about the Pythagorean theorem here:

https://brainly.com/question/14930619

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Answer:

1: C

2:A

Step-by-step explanation:

Dialation is just the multiplucation of the size. If the original point is 2, 4 dialated to 2 is would be 4, 8. Basiccly just multiply by 2 in this example.

median= 7 middle part

range=7 because 8-1 or highest minus lowest numbers

mode= you got the answer

Events C and D are conditional and dependent events.

By looking at the Venn diagram, we can see that C is the event where the outcome of the dice is even.

While D is the event where the outcome is odd.

So events C and D have no common elements.

Now, the value of these events is related in any way?

Then the events are dependent and conditional, the correct option is the first one.

If you want to learn more about Venn diagrams.

https://brainly.com/question/2099071

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Answer:

There were 39 children at the party

Step-by-step explanation:

Here, we want to know the number of children at the party

To do this, we have to add the y-values ( frequencies of the age grades)

We have this as;

8 + 8 + 7 +10 + 6 = 39

Answer:1/3

Step-by-step explanation: You have 6 letters in SOCCER. There are 2 letters that are in the word soccer that are C. So, 2/6 would simplfy to 1/3 which would mean that you have a 1/3 chance of getting the letter c

Answer: 1539π cubic inches.

Step-by-step explanation:

In the figure, we have a hemisphere joined with a cylinder of the same diameter 18 inches.

Radius = 9 inches   (half of diamter)

Volume of hemisphere = [tex]\dfrac23 \pi r^3[/tex]

Volume of cylinder = [tex]\pi r^2 h[/tex], where r= radius h= height

Volume of hemisphere= [tex]\dfrac{2}{3}\pi (9)^3=486\pi in.^3[/tex]

Volume of cylinder = [tex]\pi (9)^2 (13)=1053\pi\ in.^3[/tex]

Combined volume = 486π+1053π=1539π cubic inches.

Hence, the volume of the solid = 1539π cubic inches.

Answer:

-7

Step-by-step explanation:

To find the slope of an equation, you need to plug the coordinates into the slope formula.

y2 - y1/ x2 - x1

2 - (-5) / 4 - 5

= 7 / -1

= -7

Answer:

4 Pints

Step-by-step explanation:

According to the scenario, calculations are as follows,

As we know, 1 gallon = 8 Pints

1 Quarts = 2 Pints

So, Amelia = 3 Gallons = 3 × 8 Pints = 24 Pints

Mason = 10 quarts = 10 × 2 Pints = 20 Pints

So, Number of more pints Amelia has = Amelia number of pints - Mason number of pints

= 24 pints - 20 pints

= 4 Pints  

Answer:

c>1

Step-by-step explanation:

9c>10-1

9c>9

9c/9>9/9

c>9/9

so,

c>1

Hope that helps!

Plz mark brainliest

Step-by-step explanation:

The answer is definitely 2.

which is 30 cm

Answer:

38/5

Step-by-step explanation:

Answer:

[tex]\frac{38}{15}[/tex] or/and [tex]2 \frac{8}{15}[/tex]

Step-by-step explanation:

Answer:

4 of 5 = 4/5