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Andrew [12]
3 years ago
8

Sarah practices the piano 1/3 hour in the morning, 5/6 hour in the afternoon, and 4/5 hour in the evening.

Mathematics
1 answer:
finlep [7]3 years ago
5 0

Answer:

To add 1/3 and 3/6, change 1/3 to 2/6, and add 2/6 and 3/6, which is 5/6.

To add 5/6 and 4/5, change both denominators to 30. 25/30 + 24/30 = 49/30, which is also 1 19/30.  Please mark me brainless,

Step-by-step explanation:

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Substitution y=2x-1<br> Y=-3x-6
Mice21 [21]
-3x-6=2x-1
5x=-5
x=-1

y=-3(-1)-6
y=3-6
y=-3

hope this helps!
6 0
2 years ago
Read 2 more answers
The table shows the depth of a submarine over a 2 hour period. Did the sub go up or down?By how much?
hichkok12 [17]
If the sub is closer to the surface later, we thus know that it traveled upwards.

4 0
2 years ago
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Complete the equation of the line whose slope is − 7 and y-intercept is ( 0 ,13)
nevsk [136]

Answer:

y=-7x+13

Step-by-step explanation:

y=mx+b

m= your slope

b= your y intercept

4 0
2 years ago
What two numbers add to 10 and multiply to -192? How do you find it?
Levart [38]
There is a way to do this algebraically using equations, but it is really messy so I am going to go over the way to do it. The way you do this is by finding whole numbers that multiply to make -192. Start with 1 and 192, 2 and 96, 3 and 64, etc and make the smaller number negative. 
The reason why you make the smaller number negative is because we are looking for what numbers add together to make a positive number (10). If the bigger number was negative, then we would get a negative sum. 
From what i could find, there aren't any whole numbers that satisfy this, and i doubt that the question would want you to find decimals for this. 

The way to find this with equations (in short) is to have to variables, x and y, and make two equations. in this case x+y=10 and xy=-192. Solve one equation for a variable and then use substitution to plug that variable into the other equation. if you do this you get really long decimals.
7 0
3 years ago
Eleven inches of rain fell last month. This month 10 inches fell. What the percent of decrease in the amount of rain
Luda [366]

Answer:

9.09090909091% decrease

Step-by-step explanation:

1 - 10/11 = 1/11 = 9.09090909091%

5 0
3 years ago
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