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vovikov84 [41]
4 years ago
13

Robert and dustin agree to share the cost of buying a computer that costs $1750. if robert agrees to pay $450 more than dustin,

what is the amount that dustin will pay?
Mathematics
1 answer:
lawyer [7]4 years ago
7 0
R + d = 1750
r = d + 450

d + 450 + d = 1750
2d + 450 = 1750
2d = 1750 - 450
2d = 1300
d = 1300/2
d = 650 <=== what Dustin pays

r = d + 450
r = 650 + 450
r = 1100 ...Robert pays 1100
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In a geometric sequence, the common ratio is -5. The sum of the first 3 terms is 147. What is the value of the first term of the
Gelneren [198K]

\bf \qquad \qquad \textit{sum of a finite geometric sequence} \\\\ \displaystyle S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad \begin{cases} n=\textit{last term's}\\ \qquad position\\ a_1=\textit{first term}\\ r=\textit{common ratio} \end{cases} \\\\[-0.35em] ~\dotfill

\bf \begin{cases} r=-5\\ n=3\\ S_3=147 \end{cases} \implies 147=a_1\left( \cfrac{1-(-5)^3}{1-(-5)} \right)\implies 147=a_1\left( \cfrac{1-(-125)}{1+5} \right) \\\\\\ 147=a_1\cdot \cfrac{126}{6}\implies 147=21a_1\implies \cfrac{147}{21}=a_1\implies 7=a_1

5 0
3 years ago
5(x+7)^2=245<br> find the steps
kakasveta [241]

Answer:

0,-14

Step-by-step explanation:

5(x+7)²=245

divide both sides by 5

(x+7)²=49

Taking the square root of both sides

x+7=±7

Either x+7=7

subtract 7 from both sides

x+7-7=7-7

x=0

or

x+7=-7

subtract 7 from both sides

x+7-7=-7-7

x=-14

8 0
3 years ago
Smart people I need you i'll give brainlist to person who answers
Elan Coil [88]

Answer:

Do you think it's 60 feet^2

Step-by-step explanation:

Was it correct??

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3 years ago
3t&lt;-15 a. t&lt;-5 b. t&gt;-5 c. t&lt;-45 d. t&gt;-45
irina [24]
<span>3t<-15 solve for t

divide both sides by 3
3t/3 < -15/3

Simplify
t < -5

Anser is </span><span>a. t<-5</span>
4 0
3 years ago
Read 2 more answers
Paula and Juan both entered rectangular paintings in the school art show. Paula's painting has a width of 12 inches and an area
vekshin1

Answer:

ANYTHING! MY EXAMPLE - 24x7

Step-by-step explanation:

First, I would like to find out the length of Paula"s painting.

168/12 = 14

So, Paula's dimensions are 12x14

Since we have the area, we could easily just divide 168 by anything.

168/24 = 7

So, Juan's dimensions could be 24x7 (hey that's funny, 24-7?)


Hope this helps!

Please mark brainliest.

7 0
3 years ago
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