Answers
let's solve for f :
[tex] \dfrac{1}{f} = \dfrac{1}{a} + \dfrac{1}{b} [/tex][tex] \dfrac{1}{f} = \dfrac{b + a}{ab} [/tex]Taking reciprocal of both sides :
[tex]f = \dfrac{ab}{a + b} [/tex]Related Questions
STEP By Step Explaination needed
NO sp.am
No Go.ogle
Solve it
[tex]\frac{5}{11} + \frac{3}{11} [/tex]
Answers
Answer:
8/11
Step-by-step explanation:
5+3=8
Answer:
[tex]\sf\huge\longmapsto \: \frac{8}{11} [/tex]
Step-by-step explanation:
[tex]\sf\huge\longmapsto \: \: \frac{5}{11} + \frac{3}{11} [/tex]
[tex]\sf\huge\longmapsto \: \frac{5 + 3}{11} [/tex]
[tex]\sf\huge\longmapsto \: \frac{8}{11} [/tex]
The ratio of dogs to cats at the animal shelter is 4:5. if there are 20 cats, how many dogs are there?
Answers
Answer:
Ratio of cats to dogs is 4:5
Step-by-step explanation:
There are 20 dogs.
4:5=x:20
(5)(4)=20
(4)(4)=16
Answer: 16 cats
You can find the number of cats by using proportion
Are 3and 9 divisible by 27,621
Answers
Answer:
yes
Step-by-step explanation:
I need the answer for this
Answers
Answer:
it is either f or h
EASY PLEASE HELP HELP
Write the scale without units: 1 cm:1 km
Answers
Answer:
1:1
Step-by-step explanation:
thats how you write scale
mark brainliest pls
7. The new York Volleyball Association
invited 64 teams to compete in a tournament.
After each round, half of the teams were
eliminated.
How many teams are left after 3 rounds?
Answers
Using a geometric sequence, it is found that after 3 rounds, 8 teams are left.
In a geometric series, the quotient between consecutive terms is always the same, and it is called common ratio q.
The general equation of a geometric series is given by:
[tex]a_n = a_1q^{n-1}[/tex]
In which [tex]a_1[/tex] is the first term.
In this problem:
64 teams were invited, thus [tex]a_1 = 64[/tex].After each round, half the teams are eliminated, thus [tex]q = \frac{1}{2}[/tex].The number of teams after 3 rounds is the 4th term of sequence, as the first is the initial number(0 rounds), thus:
[tex]a_n = a_1q^{n-1}[/tex]
[tex]a_4 = 64\left(\frac{1}{2}\right)^{4-1}[/tex]
[tex]a_4 = 8[/tex]
After 3 rounds, 8 teams are left.
A similar problem is given at https://brainly.com/question/25317689
Math Question for An assignment
Answers
Answer: y = 5/2x + 4
Step-by-step explanation:
y = 5/2x + c
1) Substitute
-6 = 5/2(-4) + c
-6 = -10 + c
-6 + 10 = c
4 = c
y = 5/2x + 4 or
y = 2.5x + 4
giải hộ toi bài tập nó khá khó
Answers
Answer:
hhhhhhhhhhhhhhhhhhhh
Suppose you have a 100 AED of coupons at Dubai Expo 2020. You spend 30 AED per game. Write an equation that models the total amount of money y you spent if you play x games.
Answers
The total amount of money y you spent if you play x games is expressed as y = 1/30x
Given the following
Total amount of AED of coupons at Dubai Expo 2020 = 100 AED
If you spend 30 AED per game, this can be expressed as:
30 AED = 1 game
100 AED = x game
Cross multiply
30 x = 100 * 1
30x = 100
x = 100/30
x = 10/3 games
This shows that 100 AED of coupons is used for 10/3 games
100 AED = 10/3 games
y AED = x games
Cross multiply
100 x = 10/3 y
100xy = 10/3
10 xy = 1/3
30xy = 1
y = 1/30x
Hence the total amount of money y you spent if you play x games is expressed as y = 1/30x
Learn more here: https://brainly.com/question/14107099
A model of a population of a small country is 35,000(1.03)^x. Find the current population if x equals four years since the last census.
Answers
Based on the model of the population and the amount of years that have passed, the current population is 39,393 people.
The model of the population is:
= 35,000 x (1.03)^ x
If x is 4 years, slot this into the model to get:
= 35,000 x 1.03⁴
= 35,000 x 1.12550881
= 39,393 people
In conclusion, the current population is 39,393 people.
Find out more at https://brainly.com/question/1232096.
The decimal form of (-104)/5 is ____________
Answers
Step-by-step explanation:
4.5×10 5 =450000
hope it will help you
I NEED BIG TIME HELP PLEASE ANYONE
Answers
Answer:
Its B
Step-by-step explanation:
Answer:
the answer would be B I took the quiz
Step-by-step explanation:
I took the quiz
The video advises you to "be a deadbeat". What does that mean?
Pay your credit card bill in full and on time every single month, thus paying no interest or fees.
Make the minimum payment on your credit card on time each month.
Never open a line of credit so the credit card companies do not make any money.
Answers
Answer:
Pay your credit card bill in full and on time every single month, thus paying no interest or fees.
Step-by-step explanation:
In terms of credit-cards, a deadbeat is someone who pays off their bill in full every month, on time. They usually try to avoid paying their debts.
Hence, pay your credit card bill in full and on time every single month, thus paying no interest or fees.
What is the payment?Payment is the exchange of cash, products, or services for a good or service.
Payments are normally made once all parties have concurred on the conditions.
You won't be charged interest or late fees if you pay off your credit card balance in whole and on time each month.
When it comes to credit cards, a deadbeat is someone who consistently pays their balance in full and on time each month.
Deadbeat - one who often avoids paying their own bills or expenditures
Typically, they make an effort to not pay their bills.
Hence, whenever possible, pay off your credit card balance in whole and on schedule to avoid paying interest or other costs.
To know more about the payment;
https://brainly.com/question/14311793
#SPJ6
What is the value of k?
2k+9=7−3k
k=−2
k=−0.4
k = 2
k = 3.2
PLEASE HELP !!!!!
Answers
Hi there!
»»————- ★ ————-««
I believe your answer is:
[tex]k = -0.4[/tex]
»»————- ★ ————-««
Here’s why:
⸻⸻⸻⸻
[tex]2k+9=7-3k\\\rule{150}{0.5}\\\rightarrow 2k + 9 = 7-3k\\\\\rightarrow 2k + 3k + 9 = 7 - 3k + 3k\\\\\rightarrow 5k + 9 = 7\\\\\rightarrow5k + 9 - 9 = 7 - 9\\\\\rightarrow 5k = -2\\\\\rightarrow \frac{5k=-2}{5}\\\\\rightarrow \boxed{k = -\frac{2}{5} = -0.4}[/tex]
⸻⸻⸻⸻
»»————- ★ ————-««
Hope this helps you. I apologize if it’s incorrect.
Set-up an equation to model the problem, then solve that equation:
You bought a magazine for $5 and four erasers. you spent a total of $25. How much did the eraser cost?
Answers
Answer:
$5 + 4x = 25
Step-by-step explanation:
let x = eraser
4 × x = 4x
$5 + 4x = $25
if there are approximately 1;000 middle schools in nyc then how many total middle schools students are there un the city
Answers
Answer:
Hey you didn't add enough information to answer the question, maybe add some more? Also for this question it will probably be a multiplication or division. Sorry I couldn't help more :)
Step-by-step explanation:
A triangle with an area of 370 square inches
has a height that is 6 less than 8 times its
base. Find the base and height, in inches, of
the triangle.
Base=
Height=
Answers
Answer:
Step-by-step explanation:
Area of triangle = 1/2 (base × height)
Given, area of a triangle is 192 sq ins. and its height is 8 ins less than its base.
Then, let base = b, height = b-8
Hence, 1/2 (b)*(b-8) = 192
Above equation; “times 2”,
(b)*(b-8) = 384
b^2 - 8b - 384 = 0
(b+16)(b-24)=0
The cost of a meal is split evenly between Alania and her two friends. They determine that each person owes $14.68. How much was the entire cost of the meal?
Answers
Answer:
$44.04
Step-by-step explanation:
let 3 be the number of people and 14.68 the person owes
3*14.68 = 44.04
helppppppppppppppppppppppppppppppppppppp
Answers
so you can buy 4 bottles for 3 bucks
Help me this please, i love u
Answers
Answer:
Pics block
Step-by-step explanation:
A
E
40 - 200
Z
2
What is 1/2•40•200?
Answers
Answer:
4000
Step-by-step explanation:
1/2 · 40 · 200 = 20 · 20020 · 200 = 40004000Therefore, the answer is 4000.
Pls need help, will give brianlist
Answers
Answer:
1) Your slope should be 1/5
2) Your slope should be [tex]\frac{-3}{2}[/tex]
3) Your slope should be 1/2
I hope this helps! : )
11 over 8 as decimal
Answers
Answer:
[tex] \frac{11}{8} = 1.375[/tex]
(I'LL GIVE BRAINLIEST) Carson wanted to buy a cowboy hat that cost $49.95 (with tax) at a souvenir shop. He knew he had $18 at home already, and he could earn $10 per lawn by mowing lawns for his neighbors. He came up with the following expression to figure out how many lawns he would need to mow in order to purchase the hat: M = 10w + 18 with "w" being the number of lawns he would need to mow and "M" being the total amount of money he has.
Carson then determined he would need to mow 3 lawns by completing the follow steps:
50 = 10w + 18
32 = 10w
3.2 = w
Identify Carson's error. Explain the steps to correctly solve for how many lawns Carson needs to mow. Be sure to clearly state the correct answer.
Answers
Answer:
so Carson's problem was at the end, since the neighbors are paying 10$ PER DAY, and 3 days work would only earn him 30$ meaning at the end he would be a dollar short, technically, he needs to work exactly 3.2 days, or...
let's say he works 4 hrs a day
1 Day = 4Hr
3.2 Days = X
X = 3.2 × 4
= 12.8 Hrs
so Carson needs to work 3 days and an extra 48 Minutes
Translate the sentence into an equation.
Five less than the product of 6 and a number is equal to 8.
Use the variable y for the unknown number,
Answers
There you go!
Answer:
(6 times n) - 5 = 8
Step-by-step explanation:
First we need to multiply 6 by a number and then subtract 5 from the total which will then equal to 8
How would I be able to simplify 12/3? Please explain step by step
Answers
Answer:
4/1
Step-by-step explanation:
Find the GCD (or HCF) of numerator and denominator. GCD of 12 and 3 is 3.
12 ÷ 33 ÷ 3.
Reduced fraction: 41. Therefore, 12/3 simplified to lowest terms is 4/1.
Answer:
i think you divide 12/3 and you get the answer of 4
Step-by-step explanation:
Pls help I’ll brainlest
Answers
The cat is not hungry, or doesn't like the can of tuna food, which is why they refused to eat it when it was given to them.
Try to give the cat the food again and see their reaction, if that fails, try to give the cat other foods and note the reaction to determine if the cat just doesn't like the tuna in a can or just wasn't hungry at the moment.
kia worked 30 hours and 15 minutes this weekend . if she makes $15.60 per hours ,how much did she make?
Answers
Answer:480.10
Step-by-step explanation:
Answer:
$471.9
Step-by-step explanation:
Take "30 hours and 15 minutes" into a number you can multiply. 15 minutes is a quarter of an hour, so our number is 30.25
Do 30.25 x 15.60 to get 471.9
Add a dollar sign, and there's your answer of $471.9!
Hope this helped.
The sum of three consecutive even integers is -78. What is the smallest integer? Show all working outs (5)
Answers
Answer:
The smallest integer is -27 and the integers are -27, -26, and -25
Step-by-step explanation:
We can represent this with:
x + x - 1 + x - 2 = -78
Simplify.
3x - 3 = -78
Add 3 to both sides.
3x = -75
Divide both sides by 3.
x = -25
So, the first integer is -25.
Subtract two to get the smallest integer.
-25 - 2 = - 27
We expect that students who do well on the midterm exam in a course will usually also do well on the final exam. Gary Smith of Pomona College looked at the exam scores of all 346 students who took his statistics class over a 10-year period. The least-squares line for predicting final-exam score from mid-term exam score was γ=46.6 + 0.41x.
Octavio scores 10 points above the clas mean on the midterm. How many points above the class mean do you predict that he will score on the final. (Hint: what is the predicted final-exam score for the class mean midterm score of x-bar?) This is an example of regression to the mean, the phenomenon that gave "regression" its name: students who do well on the midterm will on average do less well on the final, but still above the class mean.)
Answers
Using the model equation, the predicted mean score on the final given a score of 10 points above the class mean in the mid term exam is 50.7
The Least - Square Regression equation which models the relationship between midterm and final exam score is :
γ=46.6 + 0.41xx = 10 points ; substitute the value of x = 10 into the regression equation ;
γ=46.6 + 0.41(10)
γ=46.6 + 4.1
γ = 50.7
The number of points above the mean he'll score in the final exam is predicted to be 50.7
Learn more :https://brainly.com/question/18405415