The ratio of Wei Ling's age to Wei Xuan's age 5 years ago was 2: 5. In 9 years
time, the ratio of Welling's age to Wel Xuan's age will be 3:4 How old is Wei
Xuan now?

Answers

Answer 1

Answer:

15 years old

Step-by-step explanation:

Start by defining the variables that we are going to use throughout our working:

Let the current age of Wei Ling and Wei Xuan be L and X years old respectively.

Next, form equations using the given information.

5 years ago

Wei Ling: (L -5) years old

Wei Xuan: (X -5) years old

Given that the ratio of Wei Ling's age to that of Wei Xuan's is 2: 5,

[tex] \frac{ L - 5}{X - 5} = \frac{2}{5} [/tex]

Cross multiply:

2(X -5)= 5(L -5)

Expand:

2X -10= 5L -25

2X= 5L -25 +10

2X= 5L -15 -----(1)

9 years time

Wei Ling: (L +9) years old

Wei Xuan: (X +9) years old

Given that the ratio of Wei Ling's age to that of Wei Xuan is 3: 4,

[tex] \frac{L + 9}{X + 9} = \frac{3}{4} [/tex]

Cross multiply:

3(X +9)= 4(L +9)

Expand:

3X +27= 4L +36

3X= 4L +36 -27

3X= 4L +9 -----(2)

Let's solve using the elimination method.

(1) ×3:

6X= 15L -45 -----(3)

(2) ×2:

6X= 8L +18 -----(4)

(3) -(4):

6X -6X= 15L -45 -(8L +18)

0= 15L -45 -8L -18

0= 7L -63

7L= 63

L= 63 ÷7

L= 9

Substitute L= 9 into (1):

2X= 5(9) -15

2X= 45 -15

2X= 30

X= 30 ÷2

X= 15

Thus, Wei Xuan is 15 years old now.


Related Questions

What is a typical age (the mean) for the people who were at Movie A?

Answers

It is 39

Because you have to count the little dots all the way till it is around the most age.

2
cups
9. The tallest player on a college
basketball team is 86 inches tall. The
shortest player is 5 feet 9 inches tall.
How much taller is the player who is
86 inches tall?

Answers

Answer:

A

Step-by-step explanation:

5 feet 9 in inches=69

86-69=17

Estimate the measure of the angle shown below.

Answers

Answer:

45

Step-by-step explanation:

because it can look a little bit more like half of a right angle

Answer:

45

Step-by-step explanation:

hope this helps

i will give you the top answer and you get 50 points only if you answer this two questions!!

Answers

Answer:

The answer c for the first one The second answer is b

Step-by-step explanation:

Answer:

c and b is actuallt correct

Step-by-step explanation:

Select the correct answer.

Solve the quadratic equation.

(x + 4)(x + 1) = 0

x = 4 or x = 1
x = -4 or x = 1
x = -4 or x = -1
x = 4 or x = -1

Answers

Answer:dama isis a few days ago and I will be able toatop

s,d,;,,s;f ,;,s,;, ,;,w;,e; w., .,. w. w; .;3.;.w.a''eee;. .a'..e.rr;.;a.'.';....';;w.a;'3;.;.ee.'.'.'e.'.da'.w...a.w..eq.s.'q'w.'.'d.'a.'w.'.d'sa.;;.w;.d.a.s laging

a

Step-by-step explanation:

Answer:

The correct answer is x = -4 or x = -1

Explanation:

The equation is in factored form, so use the zero product property to solve the equation:

x + 4 = 0 or x + 1 = 0

x = -4 or x = -1

Solve x2 – 4 = 5 by graphing the related function.

Answers

Answer:

±3

Step-by-step explanation:

I attached a photo it. hope this helps.

Answer:

[tex]x2 - 4 = 5 \\ x \times 2 = 5 + 4 \\ \frac{2x}{2} = \frac{9}{2} \\ x = 4 \frac{1}{2} \\ x = 4.5[/tex]

Find a fraction that is more than 0 and less than 1/1000

Answers

Answer:

Any of these are correct:

1/1001, 1/1002, 1/1003

1/2000, 1/2358

1/10000

2/3000= 1/1500

3/4000

so many!

Step-by-step explanation:

Anything that is positive and not negative will be bigger than zero.

Anything with a 1 on top (numerator) and LARGER than 1000 on the bottom (denominator) will be less than 1/1000.

OR you can change 1/1000 by multiplying 2/2 or 3/3 or 4/4 or 5/5 etc. Then lower the top number only. Example:

1/1000 × 5/5 = 5/5000

(multiply straight across: top×top and bottom×bottom)

Then shrink the top:

3/5000

CAN SOMEBODY HELP ME PLEASE
NO LINKS

Answers

Answer:

  (-∞, ∞)

Step-by-step explanation:

The domain of a function is the set of values of the independent variable for which the function is defined. On a graph, it is the horizontal extent of the graph.

The domain of any polynomial function is "all real numbers." There are no values of x for which f(x) is undefined.

In interval notation, the domain is ...

  (-∞, ∞)

Multiply and reduce to lowest terms. Convert into a mixed number if necessary.

Answers

Answer:

1 1/3

Step-by-step explanation:

2(8/12)=16/12=1 4/12=1 1/3

Which survey question could have been asked to produce this data display?
A How much does your dog weigh?
B How many times do you feed your dog each day?
C How many bags of dog food do you buy each month?
D How much does your bag of dog food weigh?

Answers

i'm not sure since i can't see the picture you posted but if you're talking about persuasion then it should be C or B

If there are 60 fruits in all and 42 of them are lemons what percentage are the lemons

Answers

Answer:

70% of the fruits are lemons

Step-by-step explanation:

I divided 100 by 60, and then multiplied that number by 42;) Have a blessed day!

Answer:

70%

Step-by-step explanation:

put into a fraction:

42/60

Divide:

42/60=0.7

Convert:

0.7=70%

Do the angle measurements 70, 90, 75 make a triangle?

Answers

Answer:

Yes.

Step-by-step explanation:

Because the sum of any 2 sides is greater than the third side.

Interior angles of a triangle always add up to 180 degrees, so no.
90 degree is a right triangle and it would have two acute angles. An obtuse triangle would have one angle larger than 90 degrees and two acute angles. An acute triangle would have all angles smaller than 90 degrees.

Please help me I am so bad at math

Answers

(f ◦ g)(x) is the composition of f(x) with g(x), equivalently

(f ◦ g)(x) = f(g(x))

To get f(g(x)), replace every instance of x in the definition of f(x) with g(x):

f(x) = -x + 7   ⇒   f(g(x)) = f(√(x - 3)) = -√(x - 3) + 7

if x+y= -10 and x-y=2 what is the value of x

Answers

Answer:

X+Y=10, X-Y=2, what is X, Y?

Answer: x=6 and y=4

Explanation:

Given:

x+y=10 ⟶(i)

x−y=2 ⟶(ii)

From equation (ii) ,

x=2+y

Put value of x in equation (i) ,

2+y+y=10

2+2y=10

2(1+y)=10

1+y=102

1+y=5

y=5−1

y=4

Put value of y in equation (ii) ,

x−4=2

x=2+4

x=6

x + y = 10 → Eq A

x – y = 2 → Eq B

Now we will take out the expression of x from Eq A.

x + y = 10 Eq A

x = 10 – y → Expression of x

Now put the expression of x in Eq B.

x – y = 2

( 10 – y ) – y = 2

10 – 2y = 2

10 – 2 = 2y

8 = 2y

y = 8 / 2

y = 4

Now put the value of y in expression of x.

x = 10 – y

x = 10 – 4

x = 6

So, x = 6 and y = 4.

Thank you.

Hope it helps and you like it

x + y = - 10 (equation 1)

x - y = 2 (equation 2)

using equation 2 we get x = 2 + y

putting the value of x in equation 1 we get :

(2 + y) + y = - 10

2 y = -10-2

2 y = -12

y = -6

put the value of y in any equation

to get the value of x

x - y = 2

x - (-6) = 2

x + 6 = 2

x = -4

Match each logarithmic equation to its corresponding x-value.
=
5
log, t = 5
log, I = 1
=
= 4
log
1,000
16
625
3
log10+ = 3
32
1084*
= 2
>
A>
1
&

Answers

Answer:

please check photos for explanation.

The correct matches are:

32 corresponds to log₂(x) = 5

3 corresponds to log₃(x) = 1

1,000 corresponds to log₁₀ (x) = 3

625 corresponds to log₅(x) = 4

16 corresponds to log₄(x) = 2

What is Logarithm?

A logarithm is a mathematical function that represents the exponent to which a specific base must be raised to obtain a given number. In other words, it is the inverse operation of exponentiation.

The logarithm of a number x to a given base b is denoted as log_b(x), where b is the base and x is the number. It represents the power to which the base must be raised to obtain the value x.

The logarithmic equations and their corresponding x-values are as follows:

log₂(x) = 5 → x = 32

log₃(x) = 1 → x = 3

log₁₀(x) = 3 → x = 1,000

log₅(x) = 4 → x = 625

log₄(x) = 2 → x = 16

So, the correct matches are:

32 corresponds to log₂(x) = 5

3 corresponds to log₃(x) = 1

1,000 corresponds to log₁₀ (x) = 3

625 corresponds to log₅(x) = 4

16 corresponds to log₄(x) = 2

Learn more about Logarithm here:

https://brainly.com/question/30226560

#SPJ7

Which choice is equivalent to the expression below?

√-12

A. 2√3i

B. 2i√3

C. 12i

D. -2√3

E. -12i

Answers

Answer:

Step-by-step explanation:

Remark

√-12  

The square root of -12 must have an i in it somewhere. If it does not, then the minus sign stays under the root sign. If you take the root of -1 you get i, and that is outside √ sign.

Solution

A is incorrect. i is on the outside of the root sign.

B is the answer.

C does not seem to take the square root of anything except -1 so it is incorrect.

D Has no i anywhere and the -1 is incorrectly placed. D is wrong

E is just wrong. The minus should disappear once the square root of -1 is taken. 12 has a root that has not been declared.

PLEASE HELP ILL GIVE BRAINLIESTTTTTT

Answers

Answer: 1 (90) 2 ( 112 ) 3 (180)

Step-by-step explanation:

there are 4,325 players in a chess tournament. In each round, half the players are eliminated. what function can be used to find the number of players remaining in the tournament at the end of x rounds?

Answers

Sounds like Squid Game lol

4325=2x

Hope it helps!

I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER

Answers

Answer:

x = 25,

Step-by-step explanation:

(4x + 3) + (2x + 27) = 180 (Told they were a linear pair) (supplementary)

6x +30 = 180 (Combine like terms)

6x = 150 (Subtract 30 from both sides)

x = 25 (Divide both sides by 6)

m<RQS = 4(25) + 3

= 103 degrees

m<TQS = 2(25) + 27

= 77 degrees

Hope this helps

what is 3.1425 reduced to the nearest hundred.​

Answers

3.14 because the four would be the hundredth place and the two wouldn't change it so you simply drop the 2 and 5 and the four stays the same

Identify which one of the following is a formula unit:NaCl,H2O,HCl,HNO3

Answers

Based on the definition of the formula unit, the only one that is an example of this concept is NaCl.

What is a formula unit?

In chemistry, this concept refers to the representation of an ionic compound. This formula differs from others because it displays the lowest possible ratio in which the ions have the same charges and therefore the compound is neutral.

What is one example of this formula?

A classical example of this concept is NaCl because this includes a cation (positively charged) and an anion (negatively charged). Moreover, in this formula, the compound shows the lowest possible ratio between the two elements.

Learn more about compounds in: https://brainly.com/question/13516179

Find the measure of arc DB.
25°
96°
118°
146°

Answers

Answer: 146°

Step-by-step explanation:

If the factored form of a quadratic is 4(x - 3)(2x + 5) = 0, what are the roots? A. 2,-3, and 5/2 B. 3 and -5/2 C. -3 and 2/5 D. - 3 and 5/2​

Answers

Answer:

B. 3 and -5/2

Step-by-step explanation:

The roots of a quadratic equation make the value of the equation equal to 0

Here, the equation is :

4(x - 3)(2x + 5) = 0

So, whatever values of x makes the equation 0 are the roots.

Hence,

x - 3 = 02x + 5 = 0

1st x value

x - 3 = 0x = 3

2nd x value

2x + 5 = 02x = -5x = -5/2

The roots are 3 and -5/2.

What is the sum of the measures of ∠1 and ∠2?

What is the sum of the measures of Angle1 and Angle2?


mAngle1 + mAngle2 =

Answers

Answer:

131

Step-by-step explanation:

Done assignment on engine

Answer:

131

Step-by-step explanation:

edge

Rebecca is saving money to purchase a laptop which cost $1,099.51 she has already saved $354.20 and plans to continue saving $50.60 per week which inequality could be used to find W the number of weeks of Rebecca must save in order to purchase a laptop ​

Answers

Answer:

745.31+50.60w=1,099.51

W=7

Step-by-step explanation:

1st subtract 1099.51 from 354.20

2nd use your answer which is 745.31 and add that with how much she plans on saving for how ever long

3d to find out how many weeks which is 50.60*w you need to first minus 745.31 from both sides

4th so 745.31- 745.31 and 1099.51-745.31 =354.2 or .20

5th divide 354.2 by 50.60 =7

So overall w= 7

A rectangular pyramid fits exactly on top of a rectangular prism. The prism has a length of 16 cm, a width of 6 cm, and a height of 8 cm. The pyramid has a height of 14 cm. Find the volume of the composite space figure.

Answers

Answer:

1,216 cm³

Step-by-step explanation:

Volume (composite space figure) = Volume (pyramid) + volume (prism)

⇒ [16 x 6 x 14 / 3] + [16 x 6 x 8]⇒ 96 [14/3 + 8]⇒ 96 [14/3 + 24/3]⇒ 96 x 38/3⇒ 32 x 38⇒ 1,216 cm³

Please I need your help

Answers

Answer:

A is 2/4 and 4/8

B is 2/8

C is 6/8

Step-by-step explanation:

Hope it helps

solve for x ~
[tex]x {}^{2} - 5x + 6 = 0[/tex]



thankyou ~​

Answers

Answer:

x = 2 or x = 3

Step-by-step explanation:

x² - 5x + 6 = 0

x² - (3 + 2)x + 6 = 0

x² - 3x - 2x + 6 = 0

x(x-3) - 2(x - 3) = 0

(x - 3)(x -2) = 0

Either,

x - 3 = 0

x = 3

Or,

x - 2 = 0

x = 2

ANSWER

______________________

factor x² - 5x + 6

[tex] \small\tt \color{black}{(x−3)(x−2)=0}[/tex]

_______________________

SOLVING FOR X

[tex] \small\tt \color{black}{x=3,2}[/tex]

#Brainly

134355785131 times. 9283838383 pls answer​

Answers

Answer:

124733738E+19

Step-by-step explanation:

please consider as brainlest if i helped you

Answer:

=> 1.24733739e21

Step-by-step explanation:

=> 134355785131 times. 9283838383

=> 1.24733739e21

Determine the area of the
12 in
9 in
11 in
18 in
"etermine the area of the following

Answers

Answer:

21,384 all you have to do is multiply all of the numbers to find out area

Other Questions
hhhhhheeeelllppppp meee Please help I will give brainliest. If the existing product is being sold to teenagers in one country and new entry involves selling the existing product to teenagers in a new country then this represents a new product use. Group startsTrue or False Pls help I will give brainliest Each month Mary and Brad Johnson have lengthy discussions about their household spending. They do not understand why they are continually short of money even though they both have good salaries. What actions might be taken to avoid personal and financial difficulties? Based on this data and your knowledge of natural selection, which explanation best explains the trends seen in the data?(1 point) What is the discriminant of the quadratic equation x2 - 92 - 8 = 0? When composing photos to share on your social channels, a best practice is to balance the elements of your photo along 3 sections. This is described as: Please help!!! I will give Brainliest!!!! :_DWrite an equation for each situation! Cristo has been working with a free, drag and drop style editor for a while and wantsto move beyond this to a more sophisticated style of editing software. What kind ofexpanded options or features can Cristo MOST LIKELY expect with his upgradedediting software?A. versatility of movement, color-correction tools, tutorialsB. automatic image improvement, oil painting effect, watermark removalC. unintentional noise, intellectual property removal. licensingD. exclusive rights options, optical aberrations, pixilations have a good day and keep the negative energy out you life A deaf person from the United States and a deaf person from Great Britain meet on a cruise specially arranged for deaf travelers. What would be a good way for them to communicate? According to Alexander Hamilton's argument in Federalist No. 78, the best way to ensure that the federal courts exercise their power reasonably and fairly is to ______. What are 4 Types of stele in lycopodium?? A 'nativist" of the late-1800s would have been MOST likely to support What is the area of the base of this figure? What is the most common form of host-based IDS that employs signature or pattern-matching detection methods Today, there are 4296 more panthers in Florida then there were 50 years ago. If this is a percent increase of 80%, how many panthers are living in Florida today? Round to the nearest whole numberA.8,777 panthersB.9,666 panthersC.5,370 panthersD.10,256 panthersexam pls help Find the volume of the cylinder.Either enter an exact answer in terms of pi or use 3.143.143, point, 14 for pi. How does a mutation in a gene affect a protein?