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Musya8 [376]
3 years ago
12

Please help!

Mathematics
1 answer:
dedylja [7]3 years ago
7 0
This may help :))

She worked 9 hours on store and gave piano lessons for 6 hours


Let x be the no. of hours she worked on store
Cost of 1 hour on shop = $8.47
Cost of x hours on shop = $8.47x
Let y be the no. of hours she gave piano lessons
Cost of 1 hour for piano lessons = $17
Cost of y hours on shop = $17y
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Select the correct answer. what is this series written in sigma notation? 2.5 2.5(1.2) 2.5(1.2)2 ⋯ 2.5(1.2)87 a. ∑ k = 1 87 2.5
Marat540 [252]

<u> ∑ k = 1 88 2.5 ⁢ ( 1.2 ) k</u><u>  is this series written in </u><u>sigma notation. </u>

What is the series written in sigma notation?

  • A series can be represented in a compact form, called summation or sigma notation.
  • The Greek capital letter, ∑ , is used to represent the sum. The series 4+8+12+16+20+24 can be expressed as 6∑n=14n .
  • The expression is read as the sum of 4n as n goes from 1 to 6 .

Given:

2.5 + 2.5(1.2) + 2.5(1.2)2 + ⋯ + 2.5(1.2)87

If we look at the power it is always one less the term i.e., for first term the value of k=0.

So, the series in the form of summation can be written as

∑ k = 1 88 2.5 ⁢ ( 1.2 ) k

Learn more about sigma notation

brainly.com/question/16701078

#SPJ4

8 0
1 year ago
Find the measure of arc STQ.
11Alexandr11 [23.1K]

edit; found the wrong thing lol

4 0
2 years ago
Compound Inequalities <br><br> (Help Please)
erastova [34]
2x + 3 ≥ 7
2x ≥ 7 - 3
2x ≥ 4
x ≥ 4 / 2
x ≥ 2

2x + 9 > 11
2x > 11 - 9
2x > 2
x > 1

Those are your two inequalities, now we must find one that satisfies both. Combine them together you get:

1 < 2 ≤ x

That last inequality becomes your answer. 

x ≥ 2 makes both statements true. 
3 0
3 years ago
Please helpppp
tino4ka555 [31]

Answer:

Resultant is 50 mi/hr in the north east direction

Step-by-step explanation:

Plane is traveling north east at 150 mi/hr.

Now a wind is blowing from the south west at 100 mi/hr.

Now, north east and south west are directly opposite directions and such the angle between the resultant speed of the plane in flight and the wind will be;

150 - 100 = 50 mi/hr

Since the north east speed is greater than the south east speed, then the direction will be north east.

Thus, resultant is 50 mi/hr in the north east direction

4 0
3 years ago
There are 3 feet in 1 yard.Find the number of feet in a 15 yard run by a football player.
kaheart [24]

Answer:

45

Step-by-step explanation:

15*3=45

7 0
3 years ago
Read 2 more answers
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