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ZanzabumX [31]
3 years ago
8

What is the value of C so that X^2 + 15x + C is a perfect square trinomial?

Mathematics
1 answer:
MaRussiya [10]3 years ago
8 0

Answer:

225/4

Step-by-step explanation:

x^2+15x+c

take half of 15 and square it

(15/2)^2

225/4

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Im so confused! Can someone help me? I need to find the value of the variable and the measures of the angles.....
nikdorinn [45]
Hello there! I can help you! So what we are looking for is the value of x. To find the value of x, we can write and solve an equation. Set it up like this:

4x + 28 = 180

This is because the sum of the angles for a triangle is 180°. We combine the like terms to get 4x and subtract 6 from 34 to get 28. First off, let's subtract 28 from both sides. 28 - 28 cancel out. 180 - 28 is 152. That simplifies into 4x = 152. Now, divide each side by 4 to isolate the x. 4x/4 cancels out. 152/4 is 38. There's a possible value of x. Let's plug the value in and see if it works. 38 * 2 is 76. 76 - 6 is 70. 38 + 34 is 72. 70 + 72 is 142 and 142 + 38 is 180. 180 = 180. There. x = 38. Here are the answers for the angle measurements:

(x + 34) = 72°
(2x - 6) = 70°
x° = 38°

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3 years ago
To find the perimeter of a rectangle, and the length (l) and width (w) and double the sum
Step2247 [10]

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