1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Fed [463]
3 years ago
8

Lee is thinking of two Numbers,the product is 18. the quotient is 2

Mathematics
2 answers:
zzz [600]3 years ago
7 0
\begin{cases} x*y=18 \\ \frac{x}{y}=2  \end{cases}\\\\\begin{cases} 2y*y=18 \\ x=2y  \end{cases}\\\\ \begin{cases} 2y^2=18\ \ /:2 \\ x=2y  \end{cases}\\\\\begin{cases}  y^2=9  \\ x=2y \end{cases}\\\\ y^2-9=0\\\\(y-3)(y+3)=0\\y-3=0\ \ \vee \ \ y+3=0\\y=3 \ \ \vee \ \ y=-3

\begin{cases} y=3 \\ x=2y \end{cases}\ \ \vee \ \ \ \ \begin{cases} y=-3 \\ x=2y \end{cases}\\\\ \begin{cases} y=3 \\ x=2*3 \end{cases}\ \ \vee \ \ \ \ \begin{cases} y=-3 \\ x=2*(-3) \end{cases}\\\\ \begin{cases} y=3 \\ x=6 \end{cases}\ \ \vee \ \ \ \ \begin{cases} y=-3 \\ x=-6\end{cases}\\\\


defon3 years ago
6 0
X, y - the numbers

The product is 18.
xy=18

The quotient is 2.
\frac{x}{y}=2 \ \ \ |\times y \\
x=2y

Substitute 2y for x in the 1st equation:
2y \times y=18 \\
2y^2=18 \ \ \ |\div 2 \\
y^2=9 \\
y=\pm \sqrt{9} \\
y=3 \ \lor \ y=-3 \\ \\
x=2y \\
x=2 \times 3 \ \lor \ x=2 \times (-3) \\
x=6 \ \lor \ x=-6 \\ \\
(x,y)=(6,3) \hbox{ or } (x,y)=(-6,-3)

The numbers are 6 and 3 or -6 and -3.
You might be interested in
The length of a rectangle is (x + 3) inches long, and the width is 3.4
____ [38]

Answer:

A)

Step-by-step explanation:

4 0
3 years ago
Which equation illustrates the multiplicative identity property?
svlad2 [7]
I think that it’s the last
3 0
3 years ago
What is 395 times blank equals 2,370
Schach [20]
6

Oh no! Something went wrong while adding your answer
It's too short.<span> Write at least 20 characters to explain it well.</span>
4 0
3 years ago
Read 2 more answers
What’s the answer to this?
inna [77]

Since the triangle is equilateral, all its angles are equal to 60°

AO is the bisector⇒∠OAD = 30°

AO is the hypotenuse, ∠OAD = 30°⇒

OD=5*2=10m

By the Pythagorean theorem

10^2=AD^2+5^2\\AD=\sqrt{100-25} \\AD=\sqrt{75}

AC=AD+DC=2\sqrt{75}=10\sqrt{3}

S=\frac{a^2\sqrt{3} }{4}

S=\frac{(10\sqrt{3})^2\sqrt{3}  }{4} =\frac{300\sqrt{3} }{4} =75\sqrt{3} m^2

Answer: A) S=75\sqrt{3}m²

P.S. Hello from Russia and sorry for my bad english :^)

3 0
3 years ago
Elizabeth had 12 stamps. she decided to write letters to some of her relatives. after she sent her letters, she had 4 stamps lef
mr_godi [17]
She sent 8 letters 12-4=8
3 0
3 years ago
Read 2 more answers
Other questions:
  • Help please!! Ill give brainliest!!
    8·2 answers
  • Simplify 1-cot(x)/tan(x)-1
    5·1 answer
  • Factor -4d^3+ 28d^2-4d
    11·1 answer
  • What is the slope of a line that is perpendicular to the line represented by the equation y = -2/5 x+ 4/5
    6·1 answer
  • Alexis uses toy blocks to build a model of a building each toy block is 1 cubic inch The first three floors of the model are Mad
    9·1 answer
  • Which of these equations, when solved, gives a different value of x than the other three? 9.1 = -0.2x + 10 10 = 9.1 + 0.2x 10 –
    10·2 answers
  • Somebody please help me :(
    5·1 answer
  • It cost me $7.15 for 5.5 ounces of candy. How much does it cost per 1 ounce of candy
    8·1 answer
  • A beetle was running along a number line, Then the bug ran from 28 to 78. What distance did it cover? If this run took the bug 9
    15·1 answer
  • What is the image point of (-4, 2) after a translationm left 2 units and up 3 units?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!