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
enyata [817]
2 years ago
9

Tìm nghiệm của đa thức 3x+15

Mathematics
1 answer:
nika2105 [10]2 years ago
4 0
3x+15=0
<=> 3x=-15
<=> x= -15/3
<=> x= -5
Vậy nghiệm của đa thức 3x+15 là -5
You might be interested in
In the isosceles △ABC m∠ACB=120° and AD is an altitude to leg BC . What is the distance from D to base AB , if CD=4cm?
snow_lady [41]

If ΔACB is an isosceles triangle, then ∠A ≅ ∠B and AC ≅ CB

Since ∠C = 120° and ∠A + ∠B + ∠C = 180°, then ∠A = 30° and ∠B = 30°

Next, look at ΔADB.  ∠A + ∠D + ∠B = 180°, so ∠A + 90° + 30° = 180° ⇒ ∠A = 30°

Now look at ΔADC.  Since ∠A = 30° in ΔACB, and ∠A = 60° in ΔADB, then ∠A = 30° in ΔADC <em>per angle addition postulate.</em>

Now that we have shown that ΔADB and ΔADC are 30-60-90 triangles, we can use that formula to calculate the side lengths.

CD = 4 cm (given) so AC = 2(4 cm) = 8 cm

Since AC ≅ BC, then BC = 8 cm. Therefore, BD = 4 + 8 = 12 <em>by segment addition postulate.</em>

Lastly, look at ΔBHD.  Since ∠B = 30° and ∠H = 90°, then ∠D = 60°. So, ΔBHD is also a 30-60-90 triangle.

BD = 12 cm, so HD = \frac{12}{2}cm = 6 cm

Answer: 6 cm



8 0
3 years ago
Read 2 more answers
What is the multiplacation problem for sandy walk 26 miles in a month. If she were consistent in her walking for 2 years, how ma
Svetllana [295]

Answer:

624 miles

Step-by-step explanation:

We know that there are 12 months in a year, and you need to find out the total miles she walks in two years, which is 24 months.

So we multiply 26(24)

This is equal to 624 miles

6 0
3 years ago
Read 2 more answers
What is the value of x in the proportion (x - 1)/5 = (4x + 2)/35?
nirvana33 [79]

Answer:

x=3

Step-by-step explanation:

1. cross multiply to get

5(4x+2)= 35(x-1)

2. distribute

20x+10=35x-35

3. combine like terms

45=15x

4. divide :)

3=x

6 0
3 years ago
Read 2 more answers
Can someone help me on this math problem ?
faltersainse [42]

Answer:

4/3

Step-by-step explanation:

Given two points, we can find the slope by using

m = (y2-y1)/(x2-x1)

    = (20 - -16)/(7 - -20)

    = (20+16)/(7+20)

    = 36/27

   =4/3

8 0
3 years ago
Please answer asap! *picture attached*
Nastasia [14]

f(x)= x+2

g(x)= x-4

(fg)(x) = (x+2)( x-4)

= x^2 - 4x +2x -8

= x^2 -2x -8

4 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone please help me with this one question
    9·1 answer
  • Find the points on the surface y2 = 25 + xz that are closest to the origin.
    9·1 answer
  • What type of polygon is shown?
    11·2 answers
  • Write a problem that can be solved by using equal groups
    11·1 answer
  • Find the midpoint of the line segment joining the points (-1,-2) and (-3,13)
    6·1 answer
  • If f(x) = 2(3x - 5) when f(x) = 74, what is<br>the value of x?​
    12·2 answers
  • Rewrite the equation in slope-intercept form. x=4y+2
    11·2 answers
  • Given: △ABC, AB=BC=10 cm,
    12·1 answer
  • Myra is planning to purchase a recliner that costs 1,490 .the installment plan offered at the furniture store requires a 12% dow
    12·2 answers
  • The problem on the left has been solved INCORRECTLY.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!