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.
What is a typical age (the mean) for the people who were at Movie A?
It is 39
Because you have to count the little dots all the way till it is around the most age.
Do the angle measurements 70, 90, 75 make a triangle?
Answer:
Yes.
Step-by-step explanation:
Because the sum of any 2 sides is greater than the third side.
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?
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?
Answer:
A
Step-by-step explanation:
5 feet 9 in inches=69
86-69=17
CAN SOMEBODY HELP ME PLEASE
NO LINKS
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 ...
(-∞, ∞)
Please I need your help
Answer:
A is 2/4 and 4/8
B is 2/8
C is 6/8
Step-by-step explanation:
Hope it helps
I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER
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
Identify which one of the following is a formula unit:NaCl,H2O,HCl,HNO3
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
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.
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
Which choice is equivalent to the expression below?
√-12
A. 2√3i
B. 2i√3
C. 12i
D. -2√3
E. -12i
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.
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
Answer:
B. 3 and -5/2Step-by-step explanation:
The roots of a quadratic equation make the value of the equation equal to 0Here, the equation is :
4(x - 3)(2x + 5) = 0So, whatever values of x makes the equation 0 are the roots.
Hence,
x - 3 = 02x + 5 = 01st x value
x - 3 = 0x = 32nd x value
2x + 5 = 02x = -5x = -5/2The roots are 3 and -5/2.
Solve x2 – 4 = 5 by graphing the related function.
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]
Estimate the measure of the angle shown below.
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
If there are 60 fruits in all and 42 of them are lemons what percentage are the lemons
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%
if x+y= -10 and x-y=2 what is the value of x
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
Find the measure of arc DB.
25°
96°
118°
146°
Answer: 146°
Step-by-step explanation:
What is the sum of the measures of ∠1 and ∠2?
What is the sum of the measures of Angle1 and Angle2?
mAngle1 + mAngle2 =
Answer:
131
Step-by-step explanation:
Done assignment on engine
Answer:
131
Step-by-step explanation:
edge
134355785131 times. 9283838383 pls answer
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
PLEASE HELP ILL GIVE BRAINLIESTTTTTT
Answer: 1 (90) 2 ( 112 ) 3 (180)
Step-by-step explanation:
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
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
i will give you the top answer and you get 50 points only if you answer this two questions!!
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:
solve for x ~
[tex]x {}^{2} - 5x + 6 = 0[/tex]
thankyou ~
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
______________________
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
what is 3.1425 reduced to the nearest hundred.
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
&
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
Determine the area of the
12 in
9 in
11 in
18 in
"etermine the area of the following
Answer:
21,384 all you have to do is multiply all of the numbers to find out area
Find a fraction that is more than 0 and less than 1/1000
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
Multiply and reduce to lowest terms. Convert into a mixed number if necessary.
Answer:
1 1/3
Step-by-step explanation:
2(8/12)=16/12=1 4/12=1 1/3
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?
Sounds like Squid Game lol
4325=2x
Hope it helps!
Please help me I am so bad at math
(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
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
Answer:dama isis a few days ago and I will be able toatop
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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