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Nadya [2.5K]
2 years ago
11

What is the number of solutions of 4x^2+12x+9=0?

Mathematics
1 answer:
Gwar [14]2 years ago
7 0

Answer:

One Real number solution

Step-by-step explanation:

check the discriminant

12^2  - 4*4*9

b^2 - 4ac

...

144 - 16*9 =  0

one double root

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Jane sells 8 times as many Volvos as Melissa. If the difference in their sales is 35, how many cars did Jane sell?
Usimov [2.4K]
Here we have 2 variables we need to calculate:
x - how many Volvos Jane sold
y - how many Volvos Melissa sold

We write system of equations:
x = 8*y
x - y = 35
------------
8y - y = 35
7y = 35
y = 5
x = 8*5 = 40

Jane sold 40 cars.
8 0
3 years ago
Which choice represents the expression below as a single exponential
kkurt [141]

Answer:

Step-by-step explanation:

Exponential function represents as x^2 = x * x or 2^3 = 2*2*2 etc.

As per options,

(A) We are unable to write the number 79 as a exponent.

B) We are unbale to write the number 742 as a exponent as well.

(c) We are unable to write the number 73 as a exponent as well.

(d) We are able to write the number 79.79 as exponent (79)^2. Base is 79 and exponent is 2 and it is single exponential expression as base is only one number.

4 0
1 year ago
Can someone help me with this ​
Dafna1 [17]

Answer:

18.18   ///  17.9982

Step-by-step explanation:

Multiplying by 100 means moving up the other number by two digits,

soo 100x (or 100(0.1818) is now 18.18

For the next one:

0. 1818

x     99

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

 1.6362

16.3620

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

17.9982

I have no idea about that fraction part

5 0
3 years ago
Read 2 more answers
What is the surface area of a sphere with radius 4?
mario62 [17]

Answer: 64 units

Step-by-step explanation:

Remember, the formula to find surface area given radius is 4\pi r^2. Let's add in the given information:

4pi4^2 =

4pi16

64pi!

Hope this helps, please consider making me Brainliest.

5 0
1 year ago
By first calculating the size of angle LMN,
Naily [24]

Step-by-step explanation:

Hope it helps.... that is how I did it

4 0
3 years ago
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