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ratelena [41]
3 years ago
10

What are the solution(s) to the quadratic equation x^2 - 25 = 0?

Mathematics
1 answer:
katovenus [111]3 years ago
5 0
5935 their 5939 3934
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A rain gutter is made from sheets of aluminum that are 20 inches wide by turning up the edges to form right angles. Determine th
Mice21 [21]
<span>For the answer to this question,

Let x = depth of the gutter
then
18 - 2x = width of the gutter
Cross section area 
A = depth  x  width

</span><span> = x(18 - 2x)
A = 18x - 2x^2
:
Axis of symmetry will give x value for max area:

x = -b/(2a)
x = -18/(2x(-2))

x = 4.5 inches is the depth for max area

</span><span>Max area: 4.5 * 9 = 40.5 sq/in

I hope my answer helped you.</span>
3 0
3 years ago
Please please help me please help now please please help and show your steps help NOW PLEASE please help
Furkat [3]

Answer:

x=3, y=-1

Step-by-step explanation:

We know that lcm(7, 2)=14, so we need to multiply equation 1 by 2.

This gives 2(4x-7y)=2(19), which simplifies to 8x-14y=38.

We know that lcm(2, 7)=14, so we need to multiply equation 2 by 7.

This gives 7(3x-2y)=7(11), which simplifies to 21x-14y=77.

Aha! Now we have a path to the solution!

We can subtract the first equation from the second to eliminate y.

This gives (21x-14y)-(8x-14y)=(77)-(38), which simplifies to 13x=39.

We can then divide by 3 to obtain x=3!

Then, we plug x=3 into the second equation to get 3(3)-2y=11.

We can subtract 9 from both sides to get -2y=2.

We then divide by -2 to obtain y=-1.

So, x=3 and y=-1, and we're done!

3 0
3 years ago
Here are the answer choices
lubasha [3.4K]
Uhh... is this the full problem because this looks like this is half a problem.
7 0
3 years ago
What is the correct way to read 309.48
rodikova [14]

Three hundred and nine point four eight.

6 0
3 years ago
Read 2 more answers
What makes the number sentence true 5+7=7+
Fiesta28 [93]

Answer:

The answer is 5

Step-by-step explanation:

In the commutative property, the equation goes a+b=b+a

so replacing a/b, 5+7=7+5

hope this helps! :D


8 0
3 years ago
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