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
timurjin [86]
3 years ago
9

What two numbers add to 9 and multiply to -70

Mathematics
1 answer:
Alborosie3 years ago
4 0
X, y - the numbers

The numbers add to 9 and multiply to -70.
x+y=9 \\
xy=-70 \\ \\
y=9-x \\
xy=-70 \\ \\
\hbox{substitute 9-x for y in the second equation:} \\
x(9-x)=-70 \\
9x-x^2=-70 \\
-x^2+9x+70=0 \\
-x^2+14x-5x+70=0 \\
-x(x-14)-5(x-14)=0 \\
(-x-5)(x-14)=0 \\
-x-5=0 \ \lor \ x-14=0 \\
x=-5 \ \lor \ x=14 \\ \\
y=9-x \\
y=9-(-5) \ \lor \ y=9-14 \\
y=14 \ \lor \ y=-5 \\ \\
(x,y)=(-5,14) \hbox{ or } (x,y)=(14,-5)

The numbers are -5 and 14.
You might be interested in
Find the total area of the figure. It is _______ square inches.
kompoz [17]

Answer:

1100 square inches

Step-by-step explanation:

Formula: LxW

<u>Smallest rectangles</u> area: 5*20=100= 1 rectangle

there are 2 smal  rectangles so= 100*2=200

<u>Medium rectangles</u> area: 5*30=150

There are 2 so= 150*2= 300

<u>Biggest rectangle:</u> 30*20= 600

Total Area: 200+300+600= 1100 square inches

6 0
3 years ago
Given: f(x) = X2 - 3 and g(x)= x+1 The composite function g.f is
Minchanka [31]

Answer:

option (c)

Step-by-step explanation:

g.f= g(f(x))

= g(x2 -3)

= (x2 -3)+1

=x2 -2

7 0
3 years ago
Read 2 more answers
What’s the equation for mrs Mersons car
gregori [183]

Answer:

I'm not sure what your talking about? Is there a math equation? I need more information to answer this question.

Step-by-step explanation:

4 0
3 years ago
If you rotate a right triangle, what feature of the triangle changes?
rusak2 [61]
The area in which the right angle was at before. the angle nor the triangle changes
7 0
3 years ago
Need help i havent done this since 2015 :// lolz
scoray [572]
21. In a parallelogram, opposite angles are equal and adjacent angles are supplementary (add to 180°).
  m∠R = m∠P = 180° -m∠Q
  m∠Q = 107°
  m∠P = 73°

25. If you draw any diagonal, it divides the figure into two congruent triangles (by the SSS postulate). Corresponding angles are congruent, so the diagonal is a transversal between parallel lines. Thus opposite sides are parallel and the figure is a parallelogram.

27. Opposite sides are equal, and the diagonals bisect each other. Your four equations are
  2w+4 = 5w-6 . . . . w = 10/3
  12 = 3x-3 . . . . . . . x = 5
  6y = 4y+6 . . . . . . . y = 3
  27 = (5/4)z +2 . . . z = 20
7 0
4 years ago
Read 2 more answers
Other questions:
  • The difference between the two roots of the equation 3x^2+10x+c=0 is 4 2/3 . Find the solutions for the equation.
    14·1 answer
  • Which of the following is the equation of an ellipse centered at (5,1) having a vertical minor axis of length 4 and a major axis
    12·1 answer
  • you have a part time job. you work 3 hours on friday and 6 hours on saturday. you also receive an allowance of $20 per a week. y
    8·1 answer
  • Can you help me with this problems
    13·1 answer
  • Ship A receives a distress signal from the southwest, and ship B receives a distress signal from the same vessel from the north.
    6·1 answer
  • For bone density scores that are normally distributed with a mean of 0 and a standard deviation of​ 1, find the percentage of sc
    14·1 answer
  • Suppose that circles A and B have a central angle measuring 40°. Additionally, circle A has a radius of 5 2 ft and the radius of
    7·1 answer
  • A line passes through the point 2, -3 and has a slope of 9
    9·1 answer
  • Part A: Let y represent the number of rabbits after x years. Which function can be used to model y as a function of x, where x i
    10·1 answer
  • The Hernandez family is evenly splitting 7 liters of gasoline between their 4 cars.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!