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
Alla [95]
3 years ago
9

What times what equals -30 but also can be added together and equal -4

Mathematics
1 answer:
Step2247 [10]3 years ago
5 0

Answer:

Step-by-step explanation:

xy=-30

y=-30/x

x+y=-4

x-30/x=-4

x²-30=-4x

x²+4x-30=0

x^2+4x-30=0\\x=\frac{-4\pm\sqrt{16+120} }{2} \\=\frac{-4\pm\sqrt{136} }{2} \\=-2\pm\sqrt{39} \\=-2+\sqrt{39} ,-2-\sqrt{39} \\y=\frac{-4}{-2+\sqrt{39} } ,\frac{4}{2+\sqrt{39} }correction write ~-30 ~in~place~of~-4~in~the~end

You might be interested in
Juan drove 126 miles in 3 hours. If he continued at the same rate, how long would it
SSSSS [86.1K]

Answer:

if he drove 9 hours it would 378 miles

6 0
3 years ago
Read 3 more answers
Heeeeeeeeeeeelllllllllllllpppppppp
bazaltina [42]

19 is the median of the numbers

7 0
3 years ago
What is the value of x to the nearest degree?
Marrrta [24]

Answer:

Step-by-step explanation:

This is right triangle trig.  The side opposite the x is 8, and the side adjacent to the x is 5.  The tangent ratio uses those sides.  We need to find what angle has a tangent of 8/5.  To do this, make sure your calculator is in degree mode.  Then hit "2nd" then tan and you will see tan with a little -1 and a parenthesis.  Enter 8/5 and hit "enter" and you will get an angle measure of 57.9946.  Rounded to the nearest degree this is 58 degrees.  That's your answer!

8 0
3 years ago
Read 2 more answers
Sweets cost 6p how much would 43 sweets cost?
SCORPION-xisa [38]
The answer is 258 pennies
7 0
3 years ago
N squared minus eight N minus twenty equals 0
erica [24]

Answer:

n = -2 or n = 10

Step-by-step explanation:

n^2 - 8n - 20 = 0

6 0
3 years ago
Other questions:
  • −2 1/4=r−4/5<br><br> What is r?
    8·1 answer
  • Can someone help me solve X please?
    13·1 answer
  • Plz help me!!! I need this!!! Solve 1.5n ≤ −18
    10·2 answers
  • Eli walk from her house to a friends house in one hour. She can travel the same Distance on her bicycle in 15 minutes. If she ri
    6·1 answer
  • A certain TV can be purchased from the manufacture for $150. A certain online trailer has a standard markup of 30%, A certain su
    13·1 answer
  • Can someone pls help solve this
    10·1 answer
  • What is 2x +2 when x =O
    10·2 answers
  • A recipe uses 8 ounces of cocoa mix to make hot chocolate for 7 people what is the unit rate in ounces per person
    10·1 answer
  • Convert .375 to a percent ​
    14·2 answers
  • What is the surface area of the square pyramid represented by
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!