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xz_007 [3.2K]
3 years ago
8

Help!!!! What’s an appropriate method to solve 9x^2+3x-2=0??

Mathematics
1 answer:
shusha [124]3 years ago
5 0
To solve that use the Quadratic formula.
ax^{2} + bx + c = 0
9 {x}^{2}  + 3x - 2 = 0
Solve using:
x(1) =  \frac{ - b -  \sqrt{ {b}^{2}  - 4ac} }{2a}
and
x(2) =  \frac{ - b  +   \sqrt{ {b}^{2}  - 4ac} }{2a}
Answers are
x(1) =  \frac{1}{3}  \\ x(2) =   - \frac{2}{3}
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Select the scenario that best matches the equation below:<br><br> 2x + 5 = 25
son4ous [18]

Answer:

Jamie has 5 cards. his friend Bill gives him twice the number of cards he has. After this Jamie has 25 card total. I hope that this helps!!

7 0
2 years ago
The sum of G and the qoutient of 3 and h
larisa86 [58]
G+(3/h) This is the correct answer!
3 0
3 years ago
Find a and k so that the given points lie on the parabola (An algebraic solution is required)
Aleks [24]

For the given points to lie on the parabola,

a = -3 and k = 10.

An equation of a curve that has a point on it that is equally spaced from a fixed point and a fixed line is referred to as a parabola. The parabola's fixed line and fixed point are together referred to as the directrix and focus, respectively. It's also crucial to remember that the fixed point is not located on the fixed line. A parabola is a locus of any point that is equally distant from a given point (focus) and a certain line (directrix).

According to the question,

Equation of parabola : y = a(x-2)^{2} + k

Points A(1,7) and B(4,-2)

For the points to lie on the parabola,

7 = a(1-2)^{2}+k

7 = a + k

Similarly,

-2 = a(4-2)^{2} + k

-2 = 4a + k

On solving the two equations simultaneously, we get,

a = -3

k = 10

Learn more about parabolas here:

brainly.com/question/4061870

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4 0
2 years ago
Read 2 more answers
Decrease 700kg by 25% <br> (With working out)
Natali5045456 [20]

Answer: 525kg

Step-by-step explanation:

To decrease 700kg by 25% implies

700 - 25% of 700kg

25% of 700 = 25/100 × 700kg

0.25 x 700

= 175

Therefore, to decrease 700kg by 25%, since 25% is 175kg, we subtract 175kg from 700kg

700kg - 125kg

= 525kg

3 0
3 years ago
Read 2 more answers
X^2 + y^2 = 8<br> X-y=0<br> Select all of the following that are solutions to the system shown
ludmilkaskok [199]

X^2 + y^2 = 8
X-y=0 so x = y

replace x = y into X^2 + y^2 = 8

y^2 + y^2 = 8

2y^2 = 8

y^2 = 8/2

y^2 = 4

y = - 2 and y = 2

because x = y

so x = - 2 and x = 2

solutions:

x= - 2 and x = + 2

y= - 2 and y = + 2

5 0
3 years ago
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