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Keith_Richards [23]
3 years ago
11

A student usually saves $20 a month. He would like to reach a goal of saving $350 in 12 months. The student writes the equation

350=12(x+20) to represent the situation. Solve the equation for x.
Mathematics
2 answers:
valentinak56 [21]3 years ago
7 0
In this case, x is the amount more he needs to save per month

350=12(x+20)
distribute
350=12x+240
minus 240 both sides
110=12x
divide both sides by 12
9.166666=x

needs to save about $9.17 more per  month or 29.17 permonth

Mrrafil [7]3 years ago
4 0
1) 350= 12(x+20)
2)350= 12(x) +12(20)
3)350= 12x+240
4)12x+240= 350
5)12x+240= 350
-240 -240
6)12x=110
7)12x = 110
———— ——-
12 12
8)x= 110
——-
12
9) simplify
110 To 55
——— ——-
12 6
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8.) you add the x coordinates together and divide by 2
7 + 4 = 11
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2 years ago
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Answer:

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Step-by-step explanation:

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6 0
3 years ago
A survey was taken of a random sampling of residents of New York City and Los Angeles to compare how many of them own a car. A 4
erma4kov [3.2K]

Answer:

The correct option is;

There is a greater percentage of LA residents who own a car than NYC residents who do

Step-by-step explanation:

The values are presented as follows;

LA residents who own a car = 3251

NYC residents who own a car = 1478

Total residents who own a car = 4729

LA residents who do not own a car = 869

NYC residents who do not own a car = 6182

Total residents who do not own a car = 7051

Total LA residents sampled = 4120

Total NYC residents sampled = 7660

Total residents of both cities sampled = 11780

Percentage of LA residents who own a car = (3251/4120)×100 = 78.9%

Percentage of NYC residents who own a car = (1478/7660)×100 = 19.3%

The total number of people in the poll who own a car = 4729

Therefore, the correct option is that there is a greater percentage of LA residents who own a car than NYC residents who do.

7 0
2 years ago
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Inverse Variation
AURORKA [14]
(1)\\R\cdot I=a\ \ \ \ and\ \ \ 50\cdot 0.15=a\\\\ \ \Rightarrow\ \ \ a=7.5\ \ \ \Rightarrow\ \ I= \frac{7.5}{R} \ \ \ \Rightarrow\ \ \ Ans.\ A.\\\\(2)\\x\cdot y=a\ \ \ and\ \ \ 8\cdot6=a\\\\ \ \Rightarrow\ \ \ a=48\ \Rightarrow\ \ \  xy=48\ \ \ \Rightarrow\ \ \ 10y=48\ \Rightarrow\ \ \ y=4.8\ \Rightarrow\ \ \ Ans.\ D.\\\\(3)\\xy=-12\ \ \Rightarrow\ \ \ constant=-12\ \ \Rightarrow\ \ \ Ans.\ D.\\\\

(4)\\xy=-12\\\\e.g.:\ \ \ x=3\ \ and\ \ y=-4\ \ \ \ or\ \ \ \ x=-3\ \ and\ \ y=4\ \ \Rightarrow\ \ Ans.\ A.\\\\(5)\\V\cdot T=a\ \ \ and\ \ \ 18\cdot 3=a\\\\ \ \ \Rightarrow\ \ \ a=54\ \ \ \Rightarrow\ \ \ V\cdot T=54\ \ \ \Rightarrow\ \ \ V= \frac{54}{T} \ \ \ \Rightarrow\ \ \ Ans.\ C.
5 0
3 years ago
What is the circumference of a circle if the radius is 13?
Lilit [14]
C=2πr=2·π·13≈81.68141
C=81.68
7 0
3 years ago
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