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
Juli2301 [7.4K]
4 years ago
15

What two numbers multiply to -8 and add to -4

Mathematics
1 answer:
Ronch [10]4 years ago
7 0

Answer:

  -2-2√3, -2+2√3

Step-by-step explanation:

Let x represent one of the numbers. Then the other number is -4-x. We want the product to be -8:

  x(-4-x) = -8

  -4x -x^2 = -8 . . . . . eliminate parentheses

  x^2 +4x = 8 . . . . . . multiply by -1

  x^2 +4x +4 = 12 . . . add 4 to complete the square

  (x +2)^2 = 12

  x +2 = ±√12 = ±2√3

  x = -2±2√3

The two numbers are -2-2√3 ≈ -5.4641, and -2+2√3 ≈ 1.4641.

You might be interested in
Hilida spent 47$ and know has no money left she had blink before her purchase​
Bas_tet [7]

Answer:

$47

Step-by-step explanation:

If she spent 47, and had none after, she spent 47.

8 0
3 years ago
Which of the following expressions correctly uses the properties of summations to represent
madam [21]

Answer:

Option C is correct.

7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18

Step-by-step explanation:

Given the expression:  \sum_{i=1}^{18} (7i^2+9)

Using properties of summation:

  • \sum_{i=1}^{n} (a+bi) =\sum_{i=1}^{n} a + \sum_{i=1}^{n} bi
  • \sum_{i=1}^{n} a = an

Using properties of summation in the given expression we have;

\sum_{i=1}^{18} (7i^2+9)

= \sum_{i=1}^{18} 7i^2 + \sum_{i=1}^{18} 9

=7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18

Therefore, the following given expression uses the properties of summation to represents is, 7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18


8 0
3 years ago
Read 2 more answers
Violet's Botanical Garden produced flowers throughout the year. A graph demonstrating how many flowers she produced over a 12-mo
Lady bird [3.3K]

Answer:

  The domain represents a 12-month period of flower production

Step-by-step explanation:

The <em>domain</em> is <em>the horizontal extent of the graph</em>. Both the problem statement and the graph itself tell you that is a 12 month time period.

7 0
3 years ago
Read 2 more answers
Can the sides of a triangle have lengths 13, 1, and 1?
nevsk [136]

Answer:

no you cant

Step-by-step explanation:

8 0
2 years ago
Simplify - 18 = 5x + 2
gogolik [260]

Answer:

x= - 4

Step-by-step explanation:

can u mark me brainliest

4 0
3 years ago
Read 2 more answers
Other questions:
  • 5
    13·1 answer
  • Solve for c: abc=de <br> Please help!!
    5·1 answer
  • Find the area of a floor that measures 12.75 ft. by 10.5 ft. 133.875 11.775 11.875 132.875
    7·2 answers
  • What is the sum of 2.5 × 104 and 3.4 × 104
    7·2 answers
  • Which choice is equivalent to the quotient shown here when x&gt;0?
    10·1 answer
  • How do you solve for volume ? Please.
    15·2 answers
  • If Mark uses three force of a tablespoon of coffee to make 1/2 cup of coffee how much would he need to make one cup of coffee
    13·2 answers
  • The cost of making 6 chairs is $410. The cost of making 22 chairs is $570.
    12·1 answer
  • Mr. Jones's prescription calls for 1.04 tablets per day. Based on this information, how many tablets should Mr. Jones take per d
    7·1 answer
  • Slope for y=2x+3 and y intercept
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!