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Inessa05 [86]
3 years ago
12

Solve the equation for x, where x is a real number (5 points): 2x^2 + 7x - 9 = -3

Mathematics
1 answer:
Tanya [424]3 years ago
6 0
Add 3 to both sides so that the equation becomes 2x^2 + 7x - 6 = 0.
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
                              x = [ -b ± √(b^2 - 4ac) ] / (2a)
                              x = [ -7 ± √(7^2 - 4(2)(-6)) ] / ( 2(2) )
                              x = [ -7 ± √(49 - (-48) ) ] / ( 4 )
                              x = [ -7 ± √(97) ] / ( 4)
                              x = [ -7 ± sqrt(97) ] / ( 4 )
                              x = -7/4 ± sqrt(97)/4
The answers are -7/4 + sqrt(97)/4 and -7/4 - sqrt(97)/4.
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Can someone plz help ​
Gnom [1K]

Answer:27/28

1/4+5/7

TakingLCM

7+20/28

27/28

7 0
3 years ago
Read 2 more answers
What is the value of m in the figure below?
Elena L [17]
<h3>Answer:  8.2 (choice B)</h3>

==========================================================

Explanation:

First we'll need the length of segment BD, which I'll call x for now. The similar triangles allow us to set up the proportion below to solve for x

AD/BD = BD/DC

13/x = x/4

13*4 = x^2

52 = x^2

x^2 = 52

x = sqrt(52)

Segment BD is exactly sqrt(52) units long.

------------

Now focus your attention on triangle BDC. We'll use the pythagorean theorem to find BC

(BD)^2 + (DC)^2 = (BC)^2

( sqrt(52) )^2 + ( 4 )^2 = ( m )^2

52 + 16 = m^2

68 = m^2

m^2 = 68

m = sqrt(68)

m = 8.2462 approximately

m = 8.2

5 0
3 years ago
Help please I dont understand this math problem
Nostrana [21]

Answer:

24

Step-by-step explanation:

4*3*2=24 there your answers I hope this helps

8 0
3 years ago
Read 2 more answers
Simplify<br><br>2 x m x n x 8​
Dominik [7]
16mn
Find the products of the numbers
And 16mn basically just means 16xmxn
5 0
3 years ago
3) Y-3=4(n=2)<br>*to draw graph​​​​
Kazeer [188]

Answer:

[see below]

Step-by-step explanation:

I am assuming that you mean: y-3=4(x-2).

The equation is in point slope form...

y-y_1=m(x-x_1)

The point used in the equation is (2, 3). 2 replaces 'x1' and 3 replaces 'y1'.

If you convert the equation in to slope intercept form:

y-3=4(x-2)\\\\y-3=4x-8\\\\y-3+3=4x-8+3\\\\\boxed{y=4x-5}

You get -5 as the y-intercept.

So, the line you draw would pass through points (2,3) and (0,-5).

Hope this helps.

3 0
4 years ago
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