Mathematics High School

The area of a rectangle varies jointly as the length and the width, and whose A = 72 sq. cm when l = 3 cm and w = 2 cm. What is the constant of variation (k)?
a. 12
b. 10
c. 8
d. 14​

Answers

Answer 1

Answer:

a

Step-by-step explanation:

Given A varies jointly as l and w then the equation relating them is

A = klw ← k is the constant of variation

To find k use the condition A = 72 when l = 3 and w = 2 , then

72 = k × 3 × 2 = 6k ( divide both sides by 6 )

12 = k

Related Questions

x+y+y+x+8+9+638763863278432842647823

Answers

Answer:

2

+

2

+

6

3

8

7

6

3

8

6

3

2

7

8

4

3

2

8

4

2

6

4

7

8

4

0

Step-by-step explanation:

PLZ SOLVE THIZZZ.............................

Answers

Answer:

B

Step-by-step explanation:

Answer: Angle x = 77 degrees

B. Alternate Angles

Step-by-step explanation:

A car is 200 inches long. A truck is 50% longer than the car. How long is the truck?

Answers

If a truck is 50% longer than the car, then its 1.5x.

200 * 1.5

= 300

So the truck is 300 inches

*50% of 200 is 100.

100+200=300* would be your answer.

this question has already been answered in Brainly.I am just giving you the answer of what someone else said.*CREDIT GOES TO:izzykissel*

This should help.

A car gets 20 miles per gallon. How many gallons would the car need to travel 90 miles?

Answers

Answer: In decimal the answer is 4.5 but if in fraction the answer is 4 1/2

Step-by-step explanation: First we have to divide 90 and 20 will give us 4.5 or 4 1/2

90 x 20 = 4.5 or 4 1/2

Hope this help!!!

PLEASE HELP ME OUT

PEFORM THE FOLLOWING CONVERSIONS USING UNIT FACTORING

15 m = ______ mm
0.75 L = _____mm

Answers

Answer:

15000 millimeters

750000 millimeters

Write an equation in point-slope then convert into slope intercept for a line that passes through (3,-2) with a slope of -2

Answers

Answer:

Point-slope form: [tex]y+2=-2x+6[/tex]

Slope intercept form: [tex]y=-2x+4[/tex]

Step-by-step explanation:

[tex]y - y_{1} = m * (x - x_{1})[/tex]

[tex]y-(-2)=-2*(x-3)\\y+2=-2x+6\\y=-2x+4[/tex]

1. It takes you 2 hours to travel 110 miles. How far can you travel in 5 hours?

Answers

Answer:

275 miles

Step-by-step explanation:

110/2 = 55 miles

you travel 55 miles an hour

multiply that by 5 to get your answer

equals 275 miles

Hope this is helpful.

Answer:

275 miles in 5 hours

Step-by-step explanation:

110/2 is 55. 55 is 1hour so multiply 55 times 5 and thats your answer.

Heyy , can you help me do this question

Answers

Answer:

1/6 studets

Step-by-step explanation:

The answer is 30 students

need help with math

Answers

Ah sorry I got it wrong, dear

B. 1/2

Explanation: 1/4 of grape juice as already in the bottle and then a mixture containing orange, grape and apple filled the bottle meaning the mixture was 3/4. If the mixture contained equal amounts of each juice it means 1/3 of each juice was in the mixture so 1/4 plus 1/4(the original amount of grape juice that was in the bottle before the mixture was added) is equal to 2/4 simplify that and you have 1/2

2 1/6 divided by 3/4

Answers

Answer:

Exact form = 26/9

Decimal form = 2.8

Mixed number form = 2 8/9

Step-by-step explanation:

Hope this helps

x^2 - 8x + 5 = 0

(a) find the value of the discriminant

(b) state the number and type of the roots (2 real, 2 imaginary/complex or 1 real).

Answers

Answer:

√44

2 Real Roots

Step-by-step explanation:

Looking at the image attached, the discriminant is the value under the square root.

In the equation given:

a = 1

b = -8

c = 5

The discriminant is therefore:

√(b²- 4ac) = √(-8²- (4*1*5)) = √(64-20) = √44

√44 is a positive number. Because it is positive, there must be 2 real roots.

If it were negative, there would be 2 imaginary roots.

If it were zero, there would be 1 real root.

Jessica has £600.
She gives 50% to her mother.
Jessica gives 10% to her brother.
She keeps the rest.
How much money does Jessica keep?

Answers

Answer:

she keeps 270

Step-by-step explanation:

have of 600 is 300 10 percent of 300 is 30

300-30 is 270

what is 5 1/8 = ?/? please answer ty

Answers

Answer:

the awnser is in fraction form

[tex] \frac{41}{8} [/tex]

Find the slope of the line that passes through (1, 13) and (10, 6).

Answers

Answer:

-7/9

Step-by-step explanation:

Using the slope formula

m = ( y2-y1)/(x2-x1)

   = ( 6-13)/(10-1)

    = -7/9

y+4=-7(x-3)
can someone pls explain I'm so confused? In needs to be in slope int form

Answers

Answer:

so slop int form is y=mx+b

so start off by distributing the -7 to the x and -3

so that leave you with y+4=-7x+21

get it all on the same side

y-7x-17

Step-by-step explanation:

Answer:

y =  m x  +  b .

y  =  − 7 x  +  17

Step-by-step explanation:

Hope this helps!!! :))

Complete the given ordered pairs for the equation.
y= 2x + 7
(7, )
(0, )
(-5, )

Answers

* means multiply

y = 2 * 7 + 7 = 14 + 7 = 21 -> (7,21)

y = 2 * 0 + 7 = 0 + 7 = 7 -> (0,7)

y = 2 * -5 + 7 = -10 + 7 = -3 -> (-5,-3)

Martin uses his power saw every 15 seconds.How many times did he use it in one hour ?​

Answers

Answer:

60÷15 =4

Therefore Martin uses his power saw 4 times in one hour

Answer:

60/15=4

Step-by-step explanation:

He uses his power saw every 15 that inside of an hour is 4 because when you do the division its going to = 4

Raíz cuadrada cúbica de 17

Answers

Answer:

2.5713

Step-by-step explanation:

If the start Time is 8:00 and the end time is 11:00.a.m,what is the elaped time? ?​

Answers

Answer:

3 hours

Step-by-step explanation:

Explain why 50 is not a multiple of 6.

Answers

Answer: A multiple is a number that can be divided by another number a certain number of times without a remainder. A factor is one of two or more numbers that divides a given number without a remainder. Therefor, 50 could not be a multiple of 6.

Step-by-step explanation:

evaluate the following using identity
1 (a+4) ( a-4)
2. (1/p + 1/q) ( 1/p - 1/q )
3. ( 6x - 5) (6x + 5)​

Answers

Answer:

refer to the picture attached for steps

hope it helps

What is the answer to 30a + 15b + 14b =

Answers

Answer:

30a + 29b

....................

Answer:

30a + 29b is the answer

We just need to add

To the nearest tenth, what is the BEST estimate of the value 5√10

Answers

Answer:

15.8 i think

Step-by-step explanation:

Candy is sold out in 4 pound bags. How many full

Answers

Full what exactly it is not specified what you need

is this correct??????

Answers

First, since we know that the total number of stamps that Josef has is j and that Mai will have j – 500 stamps, we can set up an equation. The total number of stamps should be j + (j – 500), which can be simplified to 2j – 500. We can set up cross multiplication since we know Josef has 60% of the stamps. = When we cross multiply, we get 100j = 60(2j – 500). Next, using the distributive property, multiply to get 100j = 60(2j – 500). Then use the additive inverse property to subtract 120j from both sides and get -20j = -30,000. Finally, divide by -20 to get j = 1,500.

C. 1,500 hope this helps

pls pls do this it is very important

Answers

Answer:

6x+3+2x+8

6x+2x+3+8

8x+11x

-
How many solutions does the equation 2 + 6(x - 4) = 3x - 18 + 3x have?

A)0
B)1
C)2
D) Infinite

Answers

Answer:

C because it's a quadratic equation and it can be solved by factorization and completing the square method and also general formula

Find the commission,
Earning Commission
Sales Commision Rate Commission
$710
6%
?

Answers

Answer:

$42.60

Step-by-step explanation:

(6/100)×710

= $42.60

Find the value of X - triangle measurments
I WILL GIVE BRAINLIEST!

Answers

180/3=60
4x-20=60
4x=80
x=20

Answer:

x = 20

Step-by-step explanation:

from how the sides are marked it is an equilateral triangle, to see it does not seem. assuming that it is equilateral it has 3 angles of 60 ° for which 4x - 20 = 60

4x - 20 = 60

4x = 80

x = 80 : 4

x = 20

-------------------

4 * 20 - 20 = 60°

Use the graph to answer the following…

Answers

Answer:

slope = 2 because it goes up by 2 and across 1

10 = 2(1)+b

10=2+b

-2   -2

b = 8

y intercept = 8

equation: y = 2x+8

yes it is proportional because it has a constant rate of change or slope

Other Questions
find the the sulotion set/roots of the following equation 1. x(x + 3) = 282.3s(s-2) = 12s3.( t + 1)+(t - 8) = 454.(x + 2) (x - 2) 16_______ + __ = _ 5 3 35. 4 r______ + ____ = -2t - 3 2 Hep help help help thanks thanks use your notes to identify the accomplishments 9f the U.S. government under the Articles of confederation Read the following lines from Democracy.I do not need my freedom when Im dead.I cannot live on tomorrows bread.In these lines the speaker is stating that no person can be completely free until he or she diesdemocracy must always evolve in order to affect changeit is no good to wait for change in a vague future when change must happen nowit is difficult to look to the future when change is happening around him A nurse is reinforcing teaching to a client who was recently: Edward run 1/3 of a mile in 5 minutes. If he runs 3/4 of an hour, how far does he go? PLEASE HELP KMG MGGMMFMF. 25 POINTS!!! 3 OPTIONS!!Democratic governments may put financial and regulatory pressure on unsupportive media outlets but offer supportive media outlets _____. Select 3 options.A. unfavorable coverage B. negative publicityC. preferential access to informationD. lucrative contractsE. favorable regulatory decisions HELP ME OUT PLEASEWhat does the phrase "the common fate of all" mean in the poem? what happens to everyone unique to just a few people beloved by most people easily avoided 100 points & brainliest. Is this normal heart rhythms? The amplitude of the QRS is slightly different but Im not sure if that is normal or not? What is the first term and explicit rule for the following geometric sequence? 3. 15,75,375, 1,875 The product of 6 and a number is 38. Find the number what is one effect of the uneven heating of earth caused by the sun? what is the slope of the points (20,-3) and (19,-20) What time is it for you?What are you doing right now?How was your day?c: Are you a school bus driver?- No, not any more, but I A. used to B. used to be C. use to D. use to be 10 POINTS: Last week, Belle's Diner sold 8 milkshakes with whipped cream on top and 24 milkshakes without whipped cream. What percentage of the milkshakes had whipped cream?10 points if solve, will give brainliest to the correct answer. please explain I really need help with solving percentages, ( Thanks SO MUCH!) * THANKS!* Why does Devante decide that now is the time to tell the cops what he knowsabout King? The hate you give A camera has a listed price of $750.99 before tax. If the sales tax rate is 8.25% find the total cost of the camera with sales tax included. Round your answer to the nearest cent, as necessary.