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natta225 [31]
4 years ago
12

Solving Quadratic Equations- Factorable 2x^2 - 7x -15= 0

Mathematics
1 answer:
Pepsi [2]4 years ago
6 0

Step-by-step explanation:

2{x}^{2}  - 7x - 15 = 0

can be factored to

(2x + 3)(x - 5) = 0

Hence,

x = 5

or

x =  -  \frac{3}{2}

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Question is inside the picture, please no links we all know they are viruses at this point..
ira [324]

Answer:

False

Step-by-step explanation:

The coefficients (numbers in front) don't matter, but the exponents do.

Like terms have exactly the same exponents on the same variables.

54x^2y^3\text{ and }-12x^3y^2 are not like terms.

Example: 6x^3y^2\text{ and }-14x^3y^2 <u>are</u> like terms--same exponents on the x's, same exponents on the y's.

5 0
3 years ago
Read 2 more answers
At the beginning of the day the stock market goes down 50 1/2 points and stays at this level for most of the day. At the end of
IrinaK [193]

Answer:

<h2>The change for the day is 29 3/4</h2>

Step-by-step explanation:

In this problem, we are expected to calculate the change in the price of a particular stock

Given that the days high is 80 1/4

and also that the days low is 50 1/2

we can calculate the change by subtracting the days low from the days high

i.e 80 1/4- 50 1/2= 321/4-101/2= (321-202)/4= 119/4 = 29 3/4

<em>hence the change for the day is 29 3/4</em>

Also we can calculate the percentage change as

%change = (high-low)/low*100

%change= 80 1/4- 50 1/2/50 1/2= 29 3/4/50 1/2 *100

%change= 119/4*2/101 *100= 119/202*100= 0.589*100= 58.9%

%change= 58.9%

5 0
3 years ago
In the figure below, segment CD is parallel to segment EF and point H bisects segment DE :
Grace [21]

Answer:

See explanation

Step-by-step explanation:

In the figure below, segment CD is parallel to segment EF, DE is a transversal, then angles DIH and HGI are congruent as alternate interior angles when two parallel lines are cut by a transversal.

Consider triangles DIH and EGH. In these triangles,

  • \angle DIH\cong \angle EGH as alternate interior angles;
  • \angle DHI\cong \angle GHE as vertical angles;
  • DH\cong HE because point H bisects segment DE (given).

Thus,

\triangle DIH\cong \triangle EGH by AAS postulate

4 0
3 years ago
Why does dividing 5 by a decimal less than 1 give a quotient greater than 5
andrew-mc [135]
If you divide by a decimal, you are breaking apart 1 into multiple pieces and so you are trying to find how many of that size piece will fit into 5. For example if you divide by .5 (point five), there are 2 point fives in 1 so there are 10 point fives in 5. The quotient is larger.

I hope you got that...
5 0
3 years ago
Given the functions, f ( x ) = x2 + x - 5 and g ( x ) = 4 x2 - 2 x + 1, perform the indicated operation. When applicable, state
elixir [45]

Answer:

(f-g)(x)  =  - 3 x² + 3 x -6

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given function f(x) = x² + x - 5

                      g(x) = 4 x² - 2 x + 1

(f-g)(x)   =  f(x) - g(x)

            =  x² + x - 5 - (4 x² - 2 x + 1)

            = x² - 4 x² + x + 2 x - 5 -1

            =  - 3 x² + 3 x -6

(f-g)(x)  =  - 3 x² + 3 x -6

7 0
4 years ago
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