Find the Area of an equilateral triangle with perimeter 18. Pls help I’m suck :(
1 answer:
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This problem requires a system of equations, which we can easily come up with. "The length plus the width is 15" is L + W = 15. That is the first of 2 equations. The area is found by multiplying the length by the width, so the next statement, "The area is 44" is L*W=44. Solve that first equation for L to get L=15-W. Now sub that L value into the second equation in place of L to get an equation in terms of W only. (15-W)W=44. We will distribute to get 
. Now we will bring the 44 ovr by subtraction and put this into standard form: 
. I personally do not like to try to factor polynomials with negative leading coefficients, so let's change all those signs (yes, that's legal): 
. If you plug those values into the quadratic formula you will get w values of 11 and 4. It just so happens (and NOT by coincidence) that 11+4 = 15, which fits our "the length of a rectangle plus its width is 15", and 11*4 = 44, which fits our "the area of the rectangle is 44". So the length and width are 11 and 4, respectively.
Answer:
Step-by-step explanation:
The problem has a mistake, it should NOT be 2 = 5, rather a=5.
Now, given a = 5 (the first term is a), and
r = 1/3 (common ratio),
<em>we can solve for the sum of the infinite series by using the formula:</em>
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Where is the sum of the infinite geometric series,
a is the first term (given as 5), and
r is the common ratio ( r= 1/3 given)
<em>We now plug these into the formula and get our answer:</em>
<em></em>
Hi there!
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I believe your answer is:
D)
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Here’s why:
- A trinomial is a expression that consists of three terms.
- A term can be a number, variable, or both numbers and variables that are multiplied together.
- Answer choice 'D' has three terms, c², 'c', and '6'. Therefore, it is a trinomial.
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Hope this helps you. I apologize if it’s incorrect.