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
Travka [436]
3 years ago
7

X^(2)+x-20 splitting the middle term

Mathematics
1 answer:
lubasha [3.4K]3 years ago
5 0
Are you trying to factorise this?

Here is a way you may not have been taught....
(x + a)(x + b) = x^2 + (a + b)x + ab

So you need to find two factors of -20 that add up to +1
-4 x 5 = -20 and -4 + 5 = 1. Perfect

x^2 + x - 20 = (x - 4)(x + 5)
You might be interested in
Round your answer to the nearest hundredth if needed
zalisa [80]

Answer:

0 to the nearest hundredth is................0

Step-by-step explanation:

Im Smart :)

7 0
4 years ago
Read 2 more answers
What is the value of a when we rewrite 15^x as a^x/6
jarptica [38.1K]

Answer:

a = 11,390,625.

Step-by-step explanation:

a^x/6 =  (a^1/6)^x  

(a^1/6)^x = 15^x  so:

a^1/6 = 15

1/6 ln a = ln 15

ln a = 6 ln 15

ln a = 16.2483

a = 11390625.

4 0
3 years ago
Solve using elimination x+2y=4 -x-y=2
insens350 [35]

Answer:

x=-8 y=6

Step-by-step explanation:

Add the two equations together. This cancels the x and gets us y=6

Then substitute y in more the first equation which gets us -8

8 0
3 years ago
Read 2 more answers
Because the lid of a marker is wider than the marker itself, a set of markers can be packaged in a container that is in the shap
Tanzania [10]

Answer:

The difference in area between the trapezoid and the rectangle is 10 in²

Step-by-step explanation:

The dimensions of the trapezoid are given as follows;

Base 1, a = 12 in

Base 2, b = 10 in

Height, h = 10 in

Area, A of trapezoid;

A = \frac{a+b}{2} h = \frac{10+12}{2} 10 = 110 in^2

The dimensions of the rectangle are given as follows;

Base = 12 in

Height = 10 in

Area, A of rectangle;

Base × Height = 12 × 10 = 120 in^2

Therefore, the difference in area between the two packages is found as follows;

Difference in area between trapezoid and rectangle = 120 - 110 = 10 in²

The difference in area between the trapezoid and the rectangle = 10 in².

8 0
3 years ago
Read 2 more answers
Find the equation for the circle with a diameter whose endpoints are (3,-1) and (-2,-1)
cricket20 [7]

Answer:

The equation for the circle is: (x-\frac{1}{2} )^2 + y^2 = (\frac{5}{2} )^2

Step-by-step explanation:

Here, let us assume the two end points of the diameter are:

P (3,-1) and Q (-2,-1)

Now, as we knew diameter is the chord that passer through the center of the circle.

⇒ Mid point of DIAMETER  = Center coordinates  of the Circle

Let us assume O(x,y) is the center of the line  segment PQ.

So, by MID POINT FORMULA:

(x,y)= (\frac{3 -2}{2}  , \frac{-1-1}{2} )  =( \frac{1}{2},\frac{-2}{2})  \\\implies (x,y) =( 0.5  , -1)

⇒ The center coordinates of the circle  = O(0.5,-1)   ...... (1)

Now, RADIUS = Half of DIAMETER

Using DISTANCE FORMULA:

PQ  = \sqrt{(3-(-2))^2 + (-1 - (-1))^2}   = \sqrt{(5)^2 + 0}  = 5

So, Radius  = 5/2  = 2.5 units

Now, the  equation of circle with radius r and center coordinate ( h,k) is given as: (x-h)^2 + (y-k)^2 = r^2

Substitute r = 2.5 and (h,k)  = (0.5,0) we get:

(x-0.5)^2 + (y-0)^2 = (2.5)^2\\\implies (x-\frac{1}{2} )^2 + y^2 = (\frac{5}{2} )^2

Hence the equation for the circle is: (x-\frac{1}{2} )^2 + y^2 = (\frac{5}{2} )^2

5 0
4 years ago
Other questions:
  • Please answer I’ll rate brainlyest
    9·1 answer
  • There are a total of 91 students in a drama club and a yearbook club. The drama club has 19 more students than the yearbook club
    12·1 answer
  • What is the decimal for pi??
    6·2 answers
  • A) 7.746<br> B) 37.947<br> C) 30.984<br> D) 33.941
    12·1 answer
  • Sam has $175.00 to spend on shirts and DVDs. The shirts he wants are expensive and cost $30 each. Suppose DVDs are $12 each. Wri
    8·2 answers
  • 6) (1, -2), (-20, 19)<br> Find slope
    7·2 answers
  • Graph the equation: x = y^2 - 2
    11·1 answer
  • Lb = 64 oz Helppppppppppppp me<br><img src="https://tex.z-dn.net/?f=5" id="TexFormula1" title="5" alt="5" align="absmiddle" clas
    8·1 answer
  • What is the answer to this equation?
    7·2 answers
  • NEEED HELP THANK YOU
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!