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Levart [38]
3 years ago
7

What are the solutions of the quadratic function 49x2=9

Mathematics
2 answers:
aleksandrvk [35]3 years ago
5 0

49x² = 9

Divide both sides by 49:

x² = 9/49

Take the square root of both sides:

x = +/- √9/49

Simplify:

x = -3/7 and 3/7

mylen [45]3 years ago
3 0

Answer:

49x^2 - 9 = 0As there is no x term, we can pretty much guess we have a situation where we factlrise by something known aa difference of two squares, so to factorise it:49 = 7^29 = 3^2x^2 = (x)^2so...(7x - 3)(7x + 3) = 07x - 3 = 0 7x + 3 = 0x = 3/7 x = -3/7

Step-by-step explanation:

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2 years ago
Systems of linear equations iready quiz
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Answer:

<h2>One solution.</h2>

Step-by-step explanation:

The given question is

<em>Does the following system have One Solution, No Solution, or Infinite Solutions.   </em>

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<em />

<em />

To solve this system, we just need to multiply the first equation by -1, and then sum those equations.

-y = -4x - 8\\y = -5x + 3

0=-9x-5\\5=-9x\\x=-\frac{5}{9}

Then, we use this value to find the other one

y=4x+8\\y=4(-\frac{5}{9} )+8\\y=-\frac{20}{9}+8\\y =\frac{-20+72}{9} \\y=\frac{52}{9}

As you can observe, the system of equations have a unique solution.

Therefore, the answer is one solution.

7 0
3 years ago
1. -4x + 5 = 2x - 7<br> 2. 6x - 8 = 4x + 2<br> 3. -3x - 5 = 2x + 10
Svetllana [295]

Answer: 1. x=2

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 3.x=-3

Isolate the variable by dividing each side by factors that don't contain the variable.

Move all terms not containing x    to the right side of the equation.

Hope this helped

7 0
3 years ago
IHELP if 1 out of 5 animals are cats then how many cats are there in an ecosystem of 200 animals???​
mote1985 [20]
There are 40 cats in the ecosystem.

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3 0
3 years ago
Evaluate the expression for the given value of the variable.
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Step-by-step explanation:

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2 years ago
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