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
hjlf
4 years ago
12

What numbers multiply to -30 and add to -3

Mathematics
1 answer:
krek1111 [17]4 years ago
3 0
Let the numbers be x and y.  Then xy = -30 and  x+y = -3.

Solve xy = -30 for y:    y = -30/x

subst. -30/x for y in   x+y= -3:     x  -  30/x = -3

Multiply all 3 terms by x:  x^2 - 30 = -3x, so   x^2 + 3x - 10 = 0

Solve this quadratic equation for x.     x: {-5, 2}

If x = -5, then   x+y = -3 becomes -5 + y = -3, and y = 2.

You should check to determine whether x=2 is also correct.  If it is, what is the corresponding y value?
You might be interested in
Input in standard form the equation of the given line.<br><br> The line with m = -1/2 and b = 1
Georgia [21]

Exact Form:

−1/2, b = 1

-12,b=1

Decimal Form:

−0.5,b=1

IF YOU LIKE MY ANSWER PLS GIVE ME BRAINLIEST!!

7 0
4 years ago
Read 2 more answers
The x-axis contains the base of an equilateral triangle RST. The origin is at S. Vertex T has coordinates (2h, 0) and the y-coor
frosja888 [35]
For the first part remember that an equilateral triangle is a triangle in which all three sides are equal & all three internal angles are each 60°. <span>So x-coordinate of R is in the middle of ST = (1/2)(2h-0) = h
And for the second </span><span> since this is an equilateral triangle the x coordinate of point R is equal to the coordinate of the midpoint of ST, which you figured out in the previous answer. Hope this works for you</span> 
7 0
4 years ago
Read 2 more answers
Pre Calc Question Help,
julsineya [31]

Answer:

Step-by-step explanation:

Domain is the set of all values of x where the function is defined. For this function the only limitation upon x exists when the denominator would equal zero, because division by zero is undefined. So the denominator 13-x cannot equal zero thus x cannot equal 13. Thus the domain is all real numbers except 13.

5 0
3 years ago
Read 2 more answers
Is 2.125 rational number
lubasha [3.4K]

Answer: Yes, 2.125 is a rational number.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Priya wants to buy three tickets for a concert. She has earned $195 and each ticket costs $80. She borrows the rest of the money
Ludmilka [50]

Answer:

First one : 3

Step-by-step explanation:

First one : Makes more sense for number 3. We do not know how much money she has now because we do not know the number of tickets.

Second one : I really do not know

Third one : 1

7 0
3 years ago
Other questions:
  • [Statistics and Probability] How to find if something is mutually exclusive given a sample space?
    14·1 answer
  • Count by is or 5s. Write the first five numbers you would count,starting at 15.
    7·1 answer
  • Fist fifteen digits of pie
    11·1 answer
  • The measure of angle θ is 600°. <br> The point (x, y) corresponding to θ on the unit circle is (
    11·1 answer
  • PLEASE HELP! I’ll give brainliest!
    13·1 answer
  • Write an equation in slope-intercept form for the line between (2,7) and (6, 19)
    9·1 answer
  • Someone help me with this question
    13·2 answers
  • Plis help me<br> Answer<br> A) 50<br> B)34<br> C)28<br> D) -12
    12·1 answer
  • (3×1/2) + (6×3/4) + (3×1) + 1 1/4 +1 1/2=<br>​
    6·1 answer
  • What is the area of the trapezoid?<br> Enter your answer in the box.<br><br> *box*
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!