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STALIN [3.7K]
2 years ago
6

Find all solutions that apply 9x^2+9x-4=0 Select all that apply

Mathematics
1 answer:
Archy [21]2 years ago
7 0

Answer:

D and F will be your answers

Step-by-step explanation:

hope this helps

You might be interested in
What value of k will result in the quadratic having one rational solution if 4x2+kx+4=0?
PtichkaEL [24]

The value of 'k' in the quadratic Equation    4x^{2}+kx+4=0 having one rational solution is k is 8.

<h3>What is a Quadratic Equation?</h3>
  • Quadratic equations are the polynomial equations of degree 2 in one variable of the type f(x) = ax^{2} + bx + c = 0 where a, b, c, ∈ R and a ≠ 0.
  • The standard form of a quadratic equation is ax^{2} + bx + c = 0 .

Here, the given equation is  4x^{2}+kx+4=0

By comparing the given equation with the standard form of the quadratic equation we get,

a = 4

b = k

c = 4

The given quadratic is having one rational solution, which means b^{2} -4ac=0

Therefore,

k^{2} -4 \times 4\times4=0\\k^{2} -64=0\\k^{2} =64\\k=\sqrt{64} \\k=8

Therefore, the value of k is 8.

Learn more about the quadratic equation is brainly.com/question/8649555

#SPJ4

7 0
2 years ago
The price of an item has been reduced by 30%. The original price was $70. What is the price of the item now?
Jlenok [28]

Answer:

$41.25

Step-by-step explanation:

We can use this formula to solve this problem:

s

=

p

−

(

d

×

p

)

Where:

s

is the sales price: what we are solving for in this problem.

p

is the original price: $55 for this problem.

d

is the discount rate: 25% for this problem. "Percent" or "%" means "out of 100" or "per 100", Therefore 25% can be written as  

25

100

.

Substituting and calculating  

s

gives:

s

=

$

55

−

(

25

100

×

$

55

)

s

=

$

55

−

$

1375

100

s

=

$

55

−

$

13.75

s

=

$

41.25

8 0
3 years ago
Read 2 more answers
Use the distributive property to write the following expression in expanded form. Y(2x+11z)
baherus [9]

Answer:

2xy + 11zy

Step-by-step explanation:

<u>Step 1:  Distribute </u>

y(2x + 11z)

<em>2xy + 11zy </em>

Answer:  2xy + 11zy

7 0
3 years ago
Read 2 more answers
Do anyone know what is 4x-8y=12
disa [49]
X-2y-3=0 should be the answe
6 0
2 years ago
Six machines, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machin
aev [14]

Answer:

The answer to your question is letter C

Step-by-step explanation:

This is a problem with the inverse rule of three because we expect that more machines can complete the same work in fewer days.

                              6 machines ------------------  12 days

                              x machines -------------------  8 days

               x machines = \frac{(8 days)(6 machines)}{12 days}

                            x machines = \frac{48 machines}{12}

                                   x = 4 machines

3 0
3 years ago
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