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tangare [24]
4 years ago
6

Find the 7th term of a geometric sequence with t1=5 and r = -2.

Mathematics
1 answer:
mariarad [96]4 years ago
7 0
Yea that it hhghghghgjj
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-12. 3(-2)= -6 -6-6=-12 :)
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3 years ago
2/9n + 1/2 = 2/3(n+3) what does n equal?
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\dfrac{2}{9}n+\dfrac{1}{2}=\dfrac{2}{3}(n+3)\ \ \ \ \ |multiply\ both\ sides\ by\ 18\\\\2\cdot2n+9=6\cdot2(n+3)\\\\4n+9=12(n+3)\\\\4n+9=12n+36\ \ \ \ |subtract\ 9\ from\ both\ sides\\\\4n=12n+27\ \ \ \ |subtract\ 12n\ from\ both\ sides\\\\-8n=27\ \ \ \ \ |divide\ both\ sides\ by\ (-8)\\\\n=-\dfrac{27}{8}\\\\n=-3\dfrac{3}{8}
7 0
3 years ago
A group of friends ordered 3 burgers and 3 medium fries for a total of $17.55. The price of a burger is .75 more than two times
Tatiana [17]

Answer:

Cost price of the burger = $4.15

Step-by-step explanation:

Given data:

3 burgers were ordered

3 medium fries were ordered

Total order cost 17.55

Let the price of the burger be X

Let the price of the medium fries be Y

<em>Equation for the total sale will be </em>3X + 3Y = 17.55 <em>(equation 1)</em>

<em>from this statement 'The price of a burger is .75 more than two times the price of medium fries.' </em>

X - 2Y = 0.75 <em>(equation 2)</em>

<em>There are now two equations and two unknowns, a simultaneous equation is solved to find the cost of the  burger.</em>

<em>Many methods can be used to solve these equations but in this case substitution will be used</em>

<em>From equation 2 </em>

X = 0.75 + 2Y<em> (equation 3)</em>

<em>Substituting equation 3 into equation 1</em>

3(0.75 + 2Y) + 3Y = 17.55

2.25 + 6Y + 3Y = 17.55

6Y + 3Y = 17.55-2.25

9Y = 15.3

Y = 1.7

<em>Substituting Y into equation 3</em>

X = 0.75 + 2Y

X = 0.75 + 2(1.7)

X = 0.75 + 3.4

X = 4.15

Therefore the cost price of the burger is $4.15

6 0
3 years ago
Help what is greater?45.10 or 45.01???
Anika [276]
45.10 is greater than 45.01
4 0
3 years ago
Read 2 more answers
Seven more than a number, x, is at most 20
Verdich [7]

Answer:

x+7 ≤ 20

Just take it step by step:

seven more than a number is a number plus 7 (x+7)- keep in mind we dont know what the number is so we use x to represent the number.

it then says it's equal to at most 20.

This means that it cant equal anything above 20 since 20 is the max. Therefore, it must be 20 and below that x+7 equals

x+7≤ 20

≤ -this symbol means less than or equal to

Step-by-step explanation:

3 0
3 years ago
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