![richardharding](/avatars/16674.jpg)
richardharding
18.07.2019 •
Mathematics
Two number differ by 3 the sum of their reciporcal is 7/10 find tge numbers
Solved
Show answers
More tips
- F Food and Cooking How to Make Napoleon Cake: A Step-by-Step Guide...
- F Food and Cooking From Latte to Espresso: Which Coffee Drink is the Most Popular on Earth?...
- C Computers and Internet How to Set Up Internet on iPhone? Detailed Guide with Step-by-Step Instructions...
- P Philosophy 8 привычек, чтобы достичь счастливой жизни...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- G Goods and services How to Choose the Right Iron: Purchase Tips...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- H Health and Medicine How to Choose the Right Glasses?...
- H Health and Medicine What vaccines do children need?...
- H Health and Medicine AKDS Vaccination: Ensure Your Child s Safety...
Answers on questions: Mathematics
- M Mathematics An ordinary (fair) die is a cube with the numbers 1 through 6 on the sides (represented by painted spots). Imagine that such a die is rolled twice in succession and...
- M Mathematics A pizza at Costco always costs $10, no matter what kind of pizza you choose to get. You decided to have a pizza party, and you need to buy 5 pizzas for all of your...
- M Mathematics Ineed solving this type of problem there are 24 purple flowers. some yellow some red. if 48% of the flowers are purple, how many flowers are there in all?...
- M Mathematics Beginning in 2000, a sports team increased its ticket price by a constant amount each year until 2010. • a ticket in 2005 cost $48 • a ticket in 2008 cost $57 how much...
- M Mathematics 6(x+5) in distributive property...
- M Mathematics Can someone me with this one pls if you do you sm !...
- M Mathematics Amy’s dad traveled 585 miles in 13 hours and he also traveled 810 is the answer...
- M Mathematics forg o ts josh is standing beside his high school football stadium. he is casting a 7 foot shadow. the stadium s shadow is 23 feet long. if josh is 6 feet tall, which...
- M Mathematics Can these three numbers be formed with the given side length? 9,7,6...
- M Mathematics You worked 49 hours this week and get paid $10.40/hr. what will your gross paycheck?...
Ответ:
Let the larger number = x
Let the smaller number = y
Equations
x - y = 3 (1)
1/x + 1/y = 7/10 (2)
Step one
solve for y
the common denominator on the left is xy So the left can be written as
Then entire equation becomes
Cross multiply
10*(x + y) = 7 * xy (3)
From the first equation x = 3 +y Put this into (3)
10(3 + y + y) = 7*xy
10(3 + 2y) = 7xy Make the same substitution on the right.10
10(3 + 2y) = 7(3 + y)*y
30 + 20y = 21y + 7y^2 Transfer the left side to the right side.
0 = 7y^2 + 21y - 20y - 30
0= 7y^2 + y - 30 This will factor.
0 = (y - 2)(7y +15)
Step Two
Solve for y
y - 2 = 0
y = 2
or
7y + 15 = 0
7y = - 15
y = - 15/7
y = - 2.1428
Step Three
Solve for x
If y = 2 then
x - y = 3
x - 2 = 3
x = 5
So one of the points is
(5,2) Answer <<<<<<<<<<1st Answer
If y = - 2 1/7 then
x - - 2 1/7 = 3
x + 2 1/7 = 3 Subtract 2 1/7 from both sides.
x = 3 - (2 1/7)
x = 6/7
So the other point is (6/7, -2 1/7) <<<< 2nd Answer
Ответ:
Step-by-step explanation:
A three dimensional configuration with its face shaped of rectangle is called a Cuboid. So, the prism is in the shape of a cuboid.
The volume of a cuboid = Length *Breadth*Height
The volume of the cuboid shaped prism is![455 cm^3](/tpl/images/0512/0080/0c274.png)