5 năm trước tổng số tuổi của hai mẹ con là 55 tuổi. Hiện nay tuổi con bằng 4/9 lần tuổi mẹ. Tính số tuổi của mẹ và tuổi con hiện nay?

Answers

Answer 1

Answer:

12

Step-by-step explanation:

12


Related Questions

Tamika ran 90 meters in 16.1 seconds. Enrique ran 90 meters in 17.0 seconds. Who had the fastest time, Tamika or Enrique? A. Enrique B. Tamika

Answers

The answer is Tamika

A college is selling tickets to the annual battle of the bands
competition. On the first day of ticket sales, the college sold 3
student tickets and 5 adult tickets for a total of $70. On the
second day, the college sold 12 student tickets and 12 adults
tickets for a total of $216.
Use elimination to solve the system of linear equations and
determine the price of each student ticket, x, and each adult
ticket, y. Write your answer as an ordered pair (x,y).

Answers

Answer:

Step-by-step explanation:

Answer:

(10,8)

Step-by-step explanation:

Can someone help me with his I will mark u brilliant

Answers

Answer: 1260 books

Step-by-step explanation:

2/5=0.4

19000x0.4=7600

12500x0.4=5000

7600+5000=12600

1/10=0.1

12600x0.1 = 1260

/Answer:

1,260 books (or C)

Step-by-step explanation:

1. 2/5 of fiction (12,500) are out, so 5,000 are out

2. 2/5 of non-fiction (19,000) are out, so 7,600 are out

3. Total books checked out are 12,600

4. 1/10 of checked out books are due this week, so 1,260 books (10%)

Which of the following shows the prime factorization of 200 using exponential notation?​

Answers

Answer:

As we use prime factorization for 200, we get 2 × 2 × 2 × 5 × 5 = 200.

The original price of a Shirt was $45. In sales, the shirt is reduced to $32.50. Calculate the percentage reduction.

Answers

Answer:

27.8%

Step-by-step explanation:

[tex]\frac{32.5}{45} =0.722[/tex]

0.722 = 72.2%

The % reduction is:

(100-72.2)% = 27.8%

Hope this helps

Identify the slope and y-intercept of the line 4x + 2y < 3.

Answers

Answer:

Step-by-step explanation:

4x+2y<3

y<-2x + [tex]\frac{3}{2}[/tex]

1) -4/3
2) -3/4
3) 10/17
4)17/10

Answers

Answer:

boom bam ba boom bam ba

Answer: -3/4

Step-by-step explanation:

The y value is decreasing by -0.75

-3.75 - 0.75 = -4.5

-4.5 - 0.75 = -5.25

-5.25 - 0.75 = -6

ect.

-0.75 in fraction form is -3/4

Solve the following system of equations.
y = 2x + 1
y = x2 – 5x + 7

Answers

The solution of the system of equation is (6, 13) and (1, 3).

How to solve system of equation?

The system of equation can be solved using substitution method. Therefore, let's solve the system of equation by substitution method.

y = 2x + 1

y = x² - 5x + 7

substitute the value of y in equation(ii)

2x + 1 =  x² - 5x + 7

x² - 5x + 7 - 2x  - 1 = 0

x² - 7x + 6 = 0

x² - x - 6x + 6 = 0

x(x - 1) - 6(x - 1) = 0

(x - 6)(x - 1) = 0

x = 6 and x = 1

Hence,

when x = 6

y = 2(6) + 1

y = 12 + 1 = 13

when x = 1

y = 2(1) + 1

y = 3

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state whether each of the following equations represent growth or decay.

Answers

Answer:

ehhh Pfouto math ni

dali raka AA yooo

Find the amount that results from a $900 investment invested at 7% interest,
compounded continuously, after 4 years.

Answers

Omg I’m sooooo sooo sorry I don’t know how to calculate I tried soo sorry

are in the ratio of 3:4. If the first number is decreased by 5, and
the second number is increased by 5, the new ratio will be 2 : 3. What are the two
numbers?

Answers

Answer:

the first number is 75 and the second number is 100

HELPP! PICTURE ATTACHED

find f(2)​

Answers

Answer:

f(2) =  Unidentified

Step-by-step explanation:

f(2) = ((2) +4)^2/(2)^2+2(2)-8

We can simplify the equation and get 36/4+4-8. After we simplify that we get 36/0. Since we have 0 as our denominator we know that our whole answer is unidentifiable.

Problem Situation: Ben buys a table for $240. He also buys 6 chairs that all cost the same amount. His total cost is $720. What is the price of one chair? Use the drop-down menus to complete parts A and B below.

Answers

The price of one chair Ben bought is $80 and he bought 6 chairs in total.

What is a numerical expression?

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Given,  Ben buys a table for $240. He also buys 6 chairs that all cost the same amount.

Assuming each chair costs $x and his total cost is $720.

240 + 6x = 720.

6x = 720 - 240.

6x = 480.

x = 80

learn more about numerical expressions here :

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In one serving of a fruit smoothie, the ratio of the number of ounces of water to the
number of ounces of fruit is 3 to 4.
Drag the numbers into the table to show how many ounces of water and fruit are
needed for different numbers of servings.

Answers

i don’t believe you attached any pictures to this question so i don’t know exactly what kinds of different servings you want, however some examples would be

water:fruit
3:4
6:8
9:12

and such other multiples

The ratios of ounces of water and fruits for different servings are:

1 serving = 3/4

2 servings = 6/8

3 servings = 9/12

4 servings = 12/16

5 servings = 15/20

What is a ratio?

A ratio is an ordered pair of numbers a and b.

It is written as:

a / b

where b does not equal 0.

A proportion is an equation in which two ratios are set equal to each other.

We have,

In one serving:

= 3/4

The ratio of ounces of water to the ounces of fruit is 3/4.

In every number of servings, the ratios must be in proportion so,

We have the following cases:

2 servings:

= 3x2 / 4x2

= 6/8

3 servings:

= 3x3 / 4x3

= 9/12

4 servings:

= 3x4 / 4x4

= 12/16

5 servings:

= 3x5 / 4x5

= 15 / 20

Thus the ratios of ounces of water and fruits for different servings are:

1 serving = 3/4

2 servings = 6/8

3 servings = 9/12

4 servings = 12/16

5 servings = 15/20

Learn more about ratios and proportions here:

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The term laissez-faire refers to an economic system that is characterized by

A. public ownership of the basic means of production

B. equal distribution of goods and services to all citizens

C. little governmental involvement in business and financial matters

D. government planning for production of consumer goods

Answers

Answer:

Answer: C.

Step-by-step explanation:

the term laissez faire refers to the economic policy of letting owners of industry and business set working conditions without interference

(-3,5) (3,7)
What is the slope of AB ?

Answers

The slope is : 1/3
Ok done. Thank to me:>

Help help help help help m at h math math

Answers

Answer:X= 6X-14

Step-by-step explanation:

19. Ram and Rahim are partners in a firm sharing profits in the ratio of 3: 2. Kabir is admitted as a partner for 1/5th share of profits. Machinery would be appreciated by 10% (Book Value of 80,000) and Building would be depreciated by 20% (Book Value of 2,00,000). Unrecorded Debtors of 1,250 would be brought to books. There is a liability of 2,750 included in Sundry Creditors that is not to be paid. What will be the Gain (Proñt Loss on revaluation? (a) Loss of 28,000. (c) Profit 28,000. (6) Loss 40,000. (d) Profit of 40,000.​

Answers

Answer:

make me brainlist

Step-by-step explanation: firm sharing profits and losses in the ratio of 3

2. From Ist April, 2020 they decided to share the future profits equally. On this date, the General Reserve

showed a balance of 1,60,000; Revaluation of fixed assets resulted into a gain of "1,02,000 and stock resulted

to a loss of 22,000. On this date, the goodwill of the firm was valued at $3,60.000

Pas necessary journal entries for the above transactions on reconstitution of the form

Bolutions

4.
(03.02)
Match each statement (term) with its value in relation to 0 (definition). (10 points)


1.
Oliver owes his sister $27.

2.
A building is 38 feet tall.

3.
Erica jumped 2.7 feet above ground.

4.
The scuba diver was 38 feet below sea level.

5.
The basement is 8.3 feet below ground.
a.
38
b.
-38
c.
-8.3
d.
-27
e.
2.7

Answers

Answer:

Below

Step-by-step explanation:

1.-d

2.-a

3.-e

4.-b

5.-c

Answer:

-8.3ithink   so

Step-by-step explanation:

Pls look at the picture for the question.

Answers

Answer:

10

Step-by-step explanation:

each tick mark is worth 5

there is the -10, then one to the right is -5, next is 0, next is 5, next one (the one where the x is) 10, next 15, next 20.

someone help me with my assignments

Answers

Answer: Choice A

Step-by-step explanation: You are given the inequality g is less than or equal to. Greater/less than and equal to, you use solid circle. Greater/less than, you use open circle. From there, you just look at the inequality in which direction is it going at and from there, you should be able to select your choice which happens to be the first one.

I hope this explanation helps.

Best to you!

what is the value of x in m(x+n)=n​

Answers

The equation m(x + n) = n​ si solved for x will be given as x = n / m (1 - m).

What is the linear system?

A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.

The equation is given below.

m(x + n) = n​

By simplifying for x, then we have

x + n = n / m

     x = n / m - n

     x = (n - mn) / m

     x = n / m (1 - m)

More about the linear system link is given below.

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Find the common factors of the algebraic expression:- 7a²b, 14abc


please help me please it's important​

Answers

factor of 7a²b, 14abc

7a²b, 14abc= 7ab

Which is equivalent to the expression below for a +5 minus a +2

Answers

Answer:

3

Step-by-step explanation:

Positive 5 minus 2 positive its just simple subtraction.

What is 29−−√?

What 2 numbers does it fall between when placed on a number line?

Question 5 options:

Between 5 - 5.5


Between 4 - 4.5


Between 4.5 - 5


Between 5.5 - 6

Answers

Between 5 - 5.5
Hope this helps.

Find the dimensions of the rectangle with maximum area that can be inscribed in a circle of radius 10.

Answers

Answer:

Step-by-step explanation:

That will be a square with a diagonal of 20

side length of 20sin45

and area of (20sin45)² = 200 units²

prove it you say?

Area of a rectangle is base times height

A = bh

With a radius of 10, the diagonals of any rectangle inscribed will be 20 units

20² = b² + h²

h = [tex]\sqrt{400 - b^2}[/tex]

A = bh

A = b[tex]\sqrt{400 - b^2}[/tex]

Area will be maximized when the derivative is set to zero

           dA/db = [tex]\sqrt{400 - b^2}[/tex] - b²/ [tex]\sqrt{400 - b^2}[/tex]

                   0 = [tex]\sqrt{400 - b^2}[/tex] - b²/ [tex]\sqrt{400 - b^2}[/tex]

b²/[tex]\sqrt{400 - b^2}[/tex] =  [tex]\sqrt{400 - b^2}[/tex]

                  b² = 400 - b²

                2b² = 400

                  b² = 200

                  b = [tex]\sqrt{200}[/tex]

h = [tex]\sqrt{400 - b^2}[/tex]

h = [tex]\sqrt{400 - \sqrt{200}^2 }[/tex]

h = [tex]\sqrt{200}[/tex]

A = bh

A =  [tex]\sqrt{200}[/tex][tex]\sqrt{200}[/tex]

A = 200 units²


32) Out of 525 people surveyed, 210 answered yes. Estimate how many people would answer yes if 900
people were surveyed.

Answers

Answer:

360 people

Step-by-step explanation:

[tex]\frac{ 210}{525}*900[/tex][tex]=360[/tex]

Hope this helped! :)

if fifteen families are coming to the picnic and they all split the cost evenly between them how much will each family contribute towards the cost of the shelter​

Answers

How much is the shelter?

Bruce walks 3/4 mile in 1/5 what is his spewd miles per hour

Answers

Answer: Bruce's speed is 3.75 mph(miles per hour).

A straight line has the point (4, 2) and has the slope 1. What is its y intercept?

Answers

Answer:    -2

================================================

Work Shown:

m = 1 is the given slope

The point (x,y) = (4,2) is on the line

Use slope intercept form to find the y intercept

y = mx+b

2 = 1*4 + b

2 = 4 + b

2-4 = b

-2 = b

b = -2 is the y intercept

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Elizabeth earned $150 a week tutoring . If he saved $75, what percent of the money he earned did he save ? Which of the following best describes the structural make-up of a gene? You decided to test a potential malware application by sandboxing. However, you want to ensure that if the application is infected, it will not affect the host operating system. What should you do to ensure that the host OS is protected 2. Which of the following are true of the Atlanta Riot of 1906? Dozens of African Americans were killed; it began due to rumors of African American men attacking white women; Competition between African Americans and whites for jobs caused tensionAfrican Americans used violence to protest racial inequality; dozens of African Americans were killed; news of the riot was restricted to AtlantaNews of the riot was restricted to Atlanta; dozens of African Americans were killed; African Americans worried that the white upper class was becoming too powerfulAfrican Americans worried that the white upper class was becoming too powerful; dozens of African Americans were killed; African Americans used violence to protest racial inequality Annika sells 6-inch pies for $5.00 and 8-inch pies for $9.00 each. Last week she sold twice as many 6 inch pies as she did 8-inch pies. She made $133.00 from her sales. Annika defined x as the number of 6 inch pies she sold and y as the number of 8-inch pies she sold. She wrote the system below.6 x + 8 y = 133. 2 x = y.Which statements about the system are true? Check all that apply.1. Since the cost for each pie is $5 and $9, the first equation should be 5 x + 9 y = 133.2. Since the 8-inch pies are 2 inches larger, the second equation should be x + 2 = y.Since there are fewer 8-inch pies, the second equation should be x = 2 y to balance the values.3. The first equation is correct because 6x represents the money earned for 6-inch pies and 8y represents the money earned for 8-inch pies. when did racial enslavement end in the united states? How did China's natural barriers affect the early development of its civilization? easy one for you folks. show work.who ate more? PLEASEEE HELPPP!!!!! A weather station on the top of a mountain reports that the temperature is currently 0C and has been falling at a constant rate of 3C per hour. What was the temperature:1 hour ago?3 hours ago?Half an hour ago? A particular electromagnetic wave travelling in vacuum is detected to have a frequency of 3 10 12 Hz. How much time will it take to complete one cycle of this wave? Answer with solution Please help meeeeeeeeeeeeeeeeeee Which phrase describes most of the delegates to the Second Continental Congress?religious, working class, not well-knownself-educated, hardworking, ordinaryfilled with common sense, middle class, respectedformally educated, wealthy, prominent A Herbig-Haro (HH) object is:_:_________.a. a small galaxy just outside the outer edge of the Milky Wayb. where a jet from a star in the process of being born collides with (and lights up) a nearby cloud of interstellar matterc. a part of a giant molecular cloud where molecules containing two hydrogen atoms formd. a star that has too little mass to start fusion in its coree. cluster of very low-mass stars, observable only with infrared radiation pls help me answer this it's due today what important type of naval vessel was not destroyed in the attack Sure, shes got it all she is half your ageWhy is this a hyperbole? Plz help me do this squared root of -100 = 2. What does substrate-level phosphorylation involve?a. the direct formation of ATP by energy released during chemical reactionsb. the formation of ATP by the flow of protons through a membrane protein channelc. the formation of ATP by the addition of oxygend. all of the above