xis directly proportional to y.
When x=21, then y=3.
a) Express x in terms ofy.
b) Find the value ofx when y is equal to 10.​

Answers

Answer 1
x = k x y
21 = k x 3
k = 7
x = 7y

x = 7(10)
x = 70

Related Questions

x+3>70
Please helpp plzzzzzz

Answers

Answer:

x>67

So basically what you do is subtract 3 from each side :)

I NEED HELP PLEASE ANSWER IN LESS THAN 5 MINUETS!!!

Answers

Answer:

D is the correct answer

Have a good day

PLEASE HELP! I WILL GIVE BRAINLIEST!

Answers

Answer:

b=100

Step-by-step explanation:

not sure how to solve for a

a) 1/6 b) the chances are it will land on 6 100 times

One year, the population of a city was 132,000. Several years later it was 149,160.

Find the percent increase.

Answers

Answer: 13%

Step-by-step explanation:

To find the percent increase, first find the increase in figures:

= 149,160 - 132,000

= 17,160 people

Then find the percent increase in this manner:

= Increase / Previous population * 100%

= 17,160 / 132,000  * 100%

= 13%

Which of the following is an equation with ONE solution?

A
2x = 2x + 18

B
2x - 10 = 2(x - 5)

C
5(x + 3) + x

D
2x + 5= 11 - 4x

Answers

D is the answer. I hope this helps!

ill give brainliest!
please help

Answers

Answer:

it's correct option is

C. x > - 32

I don’t understand can someone help me

Answers

Thx for free pointslol

Laura's spent $5.00 of the $20.00 in her wallet. Write a decimal and percent that represents the fraction of the $20.00 Laurel spent.

Answers

Answer:

1/4 or 0.25 or 25%

Step-by-step explanation:

Answer:

0.25, or 25%

Step-by-step explanation:

1/4=0.25, and that equals 25% also 4*5=20, so 5 is 1/4 of 20.

hopes this helps

Help with this please ..

Answers

Answer:

the answer is 2.59x10^7

Write down in terms of n, an expression for the nth term
of the following sequences:
a) 12 10 8 6 4
b) 25 20 15 10 5

Answers

Answer:

In bold below.

Step-by-step explanation:

a) 12 10 8 6 4

This is an arithmetic sequence with common difference -2.

nth term = a1 + (n - 1)d

= 12 + (n - 1)-2

= 12  -2n + 2

= -2n + 14.

b) 25 20 15 10 5

This is an arithmetic sequence with common difference -5.

nth term = a1 + (n - 1)d

= 25 + (n - 1)-5

= 25  - 5n + 5

= -5n + 30.

Find the indicated term of each sequence by repeatedly multiplying the first term by the common ratio.
Enter your answer to 5 decimal places if necessary. Use a calculator.
-40, 20,-10, ...; 5th term
The 5th term of the sequence is

Answers

Answer: -2 1/2

Step-by-step explanation:

First term = a = -40

Common ratio = 2nd term / First term = 20 / -40 = -1/2

5th term = ar⁴

5th term = -40 × (-1/2)⁴

5th term = -40 × 1/16

5th term = -2 1/2

I needed help gtwbfbwfbwh​

Answers

Answer:

30 is what percent of 25 = 120.

Step-by-step explanation:

Answer:

120

Step-by-step explanation:

Write an equation for the nth term of the arithmetic sequence. Then find a10.

−5,−4,−3,−2, ...
an=

a10=

Answers

n-6 is the nth term rule 10 tenth term is 54 if you substitute i think thats what a10 means

Rafael earns $10.50 per hour helping his neighbor with their chores. He is curious how much money he will earn depending on the number of hours he works. Write an equation that describes the situation. Use x to represent the independent variable and y to represent the dependent variable.

PLZ HELP

Answers

Answer: y=10.50x

Step-by-step explanation:

The y in this equation represents the dependent varible which is our output what we are solving for. We know that Rafeal gets $10.50 per hour but we don't know how many hours he works so to represent the time we use the variable x. If we were to solve this we would take the hours that he worked and multiplied the number of hours by $10.50 to get y the cost which he earns.

The equation that represents the given statement will be equal to y = 10.50(x) and y is the dependent variable.

What is an equation?

Mathematical expressions with two algebraic symbols on either side of the equal (=) sign are called equations.

This relationship is illustrated by the left and right expressions being equal to one another. The left-hand side equals the right-hand side is a basic, straightforward equation.

As per the data mentioned in the question,

Earning made by Rafael per hour = $10.50

Let the number of hours working is x.

Then, the equation that represents the given statement,

y = 10.50(x)

Here, y is the total money earned by Rafael.

To know more about equation:

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I need help asap!!! Please explain and I will give brainliest!!

Answers

Answer:

DF ≅ AC

Step-by-step explanation:

To prove that the triangles are congruent by AAS, we need a side from each triangle to be congruent to the other, correspondingly. So, if AC ≅ DF, we could prove the triangle's congruency by AAS. In the answer choices, the only answer that works is DF ≅ AC.

Help please!!! Find the measure of A in the picture below.

Answers

Answer:

Step-by-step explanation:

If you draw in BD, you can show that triangle BCD = triangle BAD by SSS

That means that <A = <C  parts of congruent parts are congruent.

<A + <C + 115 + 71 = 360

<A + <C + 186 = 360            All convex quadrilaterals have  4 interior angles that add to  360 degrees

<A + <C = 360 - 186

<A + <C = 174

So call <A  and < C = x

x + x = 174

2x = 174

x = 174 / 2

x = 87

<A = 87

2. Find the length of the leg. If your answer is not an integer, leave it in simplest radical
form.
14
A. 14
45
B. 712
C. 98
D. 7

Answers

Answer:

C

Step-by-step explanation:

I'm bot sure if it is correct

Solve each equation.
1) -20 = -4x - 6x

Answers

Answer:

X= 2

Why

-20=-4x-6x

-20=-10x

-20/x=-10x/x

2=x

Answer:

i love algebra anyways

The ans is in the picture and the stops how i  got it

(hope that helps can i plz have brainlist it will make my day :D hehe)

Step-by-step explanation:

How much water can this container hold? Use 3.14 to approximate pie round your answer to the nearest hundredth

Answers

To find the volume of this sphere you use the equations 4/3 times pi times r^3

For this question it would look like this 4/3 * 3.14 * 8^3=v

The answer is v = 2144.66058

Given container can hold 2143.57 cu. cm. water.

What is the volume of the sphere?

[tex]V=\frac{4}{3}\times \pi \times r^{3}[/tex],

where 'r' is the radius of the sphere.

For given example,

We have been given a spherical container having radius = 8 cm

The amount of water container can hold = the volume of this spherical container

Using the formula of the volume of the sphere,

[tex]V=\frac{4}{3}\times \pi \times r^{3} \\\\V=\frac{4}{3}\times 3.14 \times 8^{3} \\\\V=2143.57~cm^3[/tex]

Therefore, this container can hold 2143.57 cu. cm. water.

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PLEASE HELP ME
Find the total surface area of the figure shown.

Answers

Answer:

I think it's C but I might be

Step-by-step explanation:

help!! i don’t understand geometry

Answers

I basically solved for x first.
42+43x+1=180
X=3.2 rounded

Next plug in the value of x into the EDC equation
43(3.2)+1=138.6

Then add it to the measure of EDN
138.6+42= 180.6

So the answer is measure of NDC= 138.6

Ken and Steve are in a long jump competition. Ken jumps 15 metres. Steve jumps 1.5 metres.
a) Who jumps further, Ken or Steve?

b) How much further does he jump?
Give your answer in metres. metres​

Answers

Answer:ken

Step-by-step explanation:

1) Sophomore students were surveyed to choose their favorite subject out of Algebra
ELA, and Social Studies. The results are shown in the two-way table below. It is
recommended to show how you calculated the answers.
:
Algebra
ELA
Social Studies
Totals
Girls
50
40
60
150
Boys
65
30
70
165
Totals
113
10
110
315
Q11) What percentage of the students survoyed were girls who preferred Algebra?
Al 1) Put the percentage of students here,
Q1.2What percentage of the boys chose Alyser
A1 2) Put the percentage of boys here
01 3) What percentage of the urls chose "TLAS
A1 3) Put the percentage of girls here.
14 Wat the deschines Studio
Al + Put the percentage of students here

Answers

Answer:

Step-by-step explanation:

Q1: 1) 50/315 x 100

       15.9

    2) 65/165 x 100

      36.4

     3) 40/150 x 100

       26.7

      4) 130/315 x 100

         41.3

HELP ME PLEASE ILL MARK BRAINLIEST PLEASE THUS IS ALGEBRA 1 PLZZZ

Answers

Answer:

y=0x+(-3)

Step-by-step explanation:

What kind of transformation is described by the rule (x, y) → (0.5x, y)?

A. Vertical compression
B. Vertical stretch
C. Horizontal compression
D. Horizontal stretch

Answers

Letter c horizontal compression, i’m doing that in schl rn:)

Which video game do you guys(and girls) like more?
*Halo (series)
*Call of duty WW2
*Call of duty Cold war
*Assassin's Creed(series)
*Pokemon (series)
*fortnite
*Titanfall (series)

Answers

Answer:

ALL OOF THEM

Step-by-step explanation:

Answer:

I like pokemon the best out of these choices. I am a logical thinker and love to think about the math involved (doing calcs) nuzlockes are such a fun challenge

- 28x + 18 = simplest form

Answers

Answer:

The answer is -2(14x - 9)

Step-by-step explanation:

Hoped this helped!

Sorry if this is wrong.

Ethan planted a tree that was 1.85 meters tall. Several years later, the tree is 5.30 meters tall. Which equation can be used to find x, the number of meters the tree has grown? 1.85 +2 = 5.30 1.85 + 5.30 = x 1.85% = 5.30 1.85 (5.30) = 2 My Progress >
18
.
1.85+x=5.30

Answers

Answer: The tree has grown 3.45 meters

Step-by-step explanation:

Equation

5.30 = x + 1.85

complete the equation so that it has infinitely many solutions

4(x/8-2)=1/4(2x-___)

Answers

E answer is 5.6 time 677.5 and that

4(x/8 - 2) = 1/4(2x - 1/2) is the complete equations for having infinitely many solutions.

What are simultaneous equations?

We know two simultaneous equations have a unique solution when they intersect at a point,

when they are parallel they have no solution and when they are coinciding they have an infinite no. of solutions.

Given, 4( x/8 - 2) = 1/4(2x -___.

(1/2)x - 8 = (1/8)x - ___.

Now, RHS is half of RHS so the blank space should be (-8/4) = -2.

And we know if one equation is some constant multiple of another they are also coinciding and have an infinite no. of solutions.

learn more about simultaneous equations here :

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The owner of a small store buys coats for $60.00 each. Answer parts a and b.
a. She sells the coats for $72.00 each. What percent of the purchase price is the sale price?
The sale price is
% of the purchase price.

Answers

20%

First we calculate the difference between the purchase and sale price.

$72.00 - $60.00 = $12.00

$12 is the increase in dollars. In order to increase as a percentage it is now necessary to divide the increase by the original purchase price.

12.00 ÷ 60.00 = 0.2

To get the final percentage we multiply the answer by 100. This simply means moving the decimal place two columns to the right.

0.2 x 100 = 20

Therefore the percent of the purchase price is 20% of the sale price.

The percent of the purchase price would be 20% of the sale price.

What is the unitary method?

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.

First we need to calculate the difference between the purchase and sale price.

$72.00 - $60.00 = $12.00

Since $12 is the increase in dollars.

To increase as a percentage we need to divide the increase by the original purchase price.

12.00 ÷ 60.00 = 0.2

This simply means moving the decimal place two columns to the right;

0.2 x 100 = 20

Therefore, the percent of the purchase price would be 20% of the sale price.

Learn more about the unitary method, please visit the link given below;

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