Answer:
b. ellipse
Step-by-step explanation:
The squared terms have the same sign and different coefficients. That means the equation describes an <em>ellipse</em>.
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<em>Additional comment</em>
<em>both variables are highest degree 2</em>:
coefficients have the same sign and magnitude: circle
coefficients have the same sign and different magnitude: ellipse
coefficients have different signs: hyperbola*
<em>only one variable has highest degree 2</em>:
parabola
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* If the equation can be factored to a product of linear terms that is zero, then the equation is of two intersecting lines. This is a degenerate case of the hyperbola in which the major axis is zero: the two vertices are the same point.
First term: a1 = 151
common difference: d = -14 (we decrease by 14 each time, eg, 151-14 = 137)
nth term of this arithmetic sequence is...
an = a1+d(n-1)
an = 151+(-14)(n-1)
an = 151-14n+14
an = -14n+165
This will be used in the formula below
Sn = n*(a1+an)/2
<span>Sn = n*(151+(-14n+165))/2
</span><span>S26 = 26*(151+(-14*26+165))/2 ... replace every n with 26
</span>S26 = -624
The final answer here is choice C) -624
<span>
</span>
D)-$60 since there are 12 months and 5 dollars for each month. 5 x 12 = 60
I believe the Correct answer is B if I’m right please mark me as brainliest
Answer:
60 degrees
Step-by-step explanation:
angle 120 divided by two gives you 60 degrees or the angle of one slice