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
sdas [7]
3 years ago
11

Which is the value of this expression when X=-2

Mathematics
1 answer:
e-lub [12.9K]3 years ago
6 0
A) x^2 +x -30 = 0 is factored by looking for two factors of 30 that differ by 1. We know ...  30 = 1*30 = 2*15 = 3*10 = 5*6The last two factors differ by 1, so we can factor the trinomial as  (x +6)(x -5) = 0
b) The solutions are found by finding values of x that make these factors zero. The only way the product will be zero is if one or more of the factors is zero.  x + 6 = 0  x = -6 . . . . . subtract 6
  x - 5 = 0  x = 5 . . . . . add 5
The solutions are x = -6 or x = 5These are the values of x that will satisfy the equation (make it true). What they mean depends on the meaning of the variable and the situation the equation is a model of.
You might be interested in
How do I solve this????<br><br> Simply the following 3 2/7 + 2 3/14 + 4 3/7.
IrinaVladis [17]
It will be
3 4/14+2 3/14+4 6/14=9 13/14
8 0
3 years ago
A diver went 25.65 feet below the surface of the ocean, and then 16.5 feet further down, he rose 12.45 feet.
Rasek [7]

If you are trying to find where he is the answer is -29.7

Hope this helps!


5 0
3 years ago
Read 2 more answers
A swimming pool is 8 meters long 6 meters wide and 2 meters deep the water resistant paint need for the pool cost $6 per square
Sati [7]

Answer:

Step-by-step explanation:

3 0
3 years ago
If 2x + 5y = 21 and x + y = 3, then what is the solution
Viefleur [7K]
2x+5y=21, x+y=3
y=3-x
2x+5y=21
2x+5(3-x) =21
2x+15-5x=21
2x-5x+15=21
-3x+15=21
-3x=21-15
-x=6/3
-x=2
x=-2

8 0
3 years ago
Julie is constructing a scale model of her room.The rectangular room is 10 1/4 inches by 8 inches.If 1 inch represents 2 feet of
zlopas [31]
The way to determine this is to know that 1 foot is 12 inches (so 2 is 24) 
Now the ration that would determine the scale factor of the room is 1:24 (1 inch for every 24 inches)
So the scale factor is 1:24
Now to determine the area we multiply the numbers we have by 2 and change the inches to feet (I hope that makes sense to you, it does to me, I'll show you)
10.25 * 2 = 20.5 ft.
8 * 2 = 16 ft.
now we know the dimensions of the room so we need to find the area.
A=B*H
20.5 * 16 = 328
so the area of the room is 328 ft.²
6 0
3 years ago
Read 2 more answers
Other questions:
  • Jenny is diving into a swimming pool from a diving board. The expression below represents Jenny's vertical height x, in feet, ab
    5·1 answer
  • If a pair of jeans cost $37.80 including 8% tax what is orginial cost before tax
    9·1 answer
  • Help me pls asap i really need this
    14·2 answers
  • In the diagram, MQ = QP = PO = ON. Triangles Q M P, M P N, and P N O are connected. Sides Q M, Q P, P O, and N O are congruent.
    9·1 answer
  • Please help me solve this #algebra #algebra1
    14·1 answer
  • A train goes at a constant speed. If it covers 150 miles in 2/1 2 hours,
    15·1 answer
  • Classify the triangle by its​ sides, and then by its angles.
    14·1 answer
  • Could i get an explanation on how to do this?
    9·1 answer
  • Answer questions D and E
    9·1 answer
  • What is the value or |-12.7| and |11.1/4| ?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!