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Salsk061 [2.6K]
3 years ago
5

Simplify -3x+ 5 (3/5x -2 1/5)

Mathematics
1 answer:
Over [174]3 years ago
4 0

Answer:

Step-by-step explanation:

-3x+ 5 (3/5x -2 1/5)

= -3x+ 5 (3/5x - 11/5)

Opening bracket

= -3x+ 3x - 11

= - 11

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An ancient Chinese candle clock tells the amount of time that has passed by the amount of wax that has been melted off the candl
rjkz [21]
Two candles=8 hours=8*60=480 minutes
4 inch is 4/12 of a candle, 4/12 of 4 hours=16/12=4/3 hours=80 minutes
so the total minutes are 480+80=560 
8 0
2 years ago
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Anna is saving to buy some souvenirs on a family vacation. She has already saved $125, and she saves another $2 from her
FinnZ [79.3K]

We can assume that the y-intercept for this equation is 125, because that would be how much Anna already has saved before she begins saving money from her allowance. Then, we know that Anna adds $2 to her savings each day from the problem, so we know that the slope will be positive 2 then.

Equation:

y = 2x + 125

Graph:

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3 years ago
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A small dog eats 9 ounces of dog each day. How many pounds is this in one year?
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Answer:

205.3 pounds

Step-by-step explanation:

7 0
2 years ago
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explain the steps you would take to determine if the point (4,7) is a solution to the equation y=1.25x+2
enyata [817]

Answer:

Point (4,7) completely satisfies the equation and is a solution to the equation.

Step-by-step explanation:

Given:

Equation: y=1.25x+2

To check if the point (4,7) is a solution to the given equation.

Solution:

The solution of an equation is given as (x,y) which completely satisfies the equation.

To check if the point (4,7) is a solution to the given equation, we will plugin x=4 and y=7 in the given equation and see if it satisfies it or not.

Plugging in point (4,7) in the equation:

7=1.25(4)+2

Simplifying.

7=5+2

7=7

The above equation is always true, and hence point (4,7) completely satisfies the equation and is a solution to the equation.

4 0
3 years ago
The weights of the cars passing over a bridge have a mean 3,550 pounds and standard deviation of 870 pounds. Assume that the wei
Inessa05 [86]

Mean = 3550

SD = 870

Find P(1810 <x<4420)

z = x -mean / sd

= (1810 - 3550 / 870) < z< (4420 - 3550 / 870)

= -2 <z< 1

Using the -z table -2 = 0.0228 and 1 = 0.8413

Subtract: 0.8413 - 0.0228 = 0.8185 x 100 = 81.85%

Rounding everything may change answer slightly so

The closest one is B 81.5%

6 0
3 years ago
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