What is the sum of the geometric sequence -4, 24, -144... if there are 10 terms?
1 answer:
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9514 1404 393
Answer:
WX = 33
(x, y) = (2, 10)
Step-by-step explanation:
The hash marks tell you WX is a midline, so has the measure of the average of the two bases.
WX = (PQ +SR)/2 = (27 +39)/2 = 66/2
WX = 33
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The hash marks also tell you ...
PW = WS
y +4x = 18 . . . . . . substitute the given expressions
and also
QX = XR
2y +x = 22 . . . . . substitute the given expressions
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If you solve the first equation for y, you get ...
y = 18 -4x
Substituting that into the second equation gives ...
2(18-4x) +x = 22
36 -7x = 22 . . . . . . . simplify
14 = 7x . . . . . . . . . . . add 7x-22 to both sides
2 = x . . . . . . . . . . . . divide by 7
y = 18 -4(2) = 10 . . . find y using the above relation
The values of x and y are 2 and 10, respectively.
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My favorite "quick and dirty" way to solve a set of linear equations is using a graphing calculator. It works well for integer solutions.
See the explanation
<h2>Explanation:</h2>Remember you have to provide complete questions in order to get exact answers. Here I'll provide a general explanation, so:
<h3>First.</h3>The slope is:
The y-intercept is:
By using graphing tool, we get the first graph shown below.
<h3>Second.</h3>The slope is:
The y-intercept is:
By using graphing tool, we get the second graph shown below.
<h3>Third.</h3>The slope is:
The y-intercept is:
By using graphing tool, we get the third graph shown below.
<h3>Fourth.</h3>The slope is:
The y-intercept is:
By using graphing tool, we get the fourth graph shown below.
<h2>Learn more:</h2>Linear inequalities: brainly.com/question/12984296
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