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Lemur [1.5K]
3 years ago
15

3x=y y=9 Solve for x.

Mathematics
2 answers:
sergejj [24]3 years ago
6 0

Answer:

x=3

Step-by-step explanation:

3x=y y=9

fill y in with 9

3x=9

÷3  ÷3

x=3

Alisiya [41]3 years ago
4 0

Answer:

x = 3

Step-by-step explanation:

3x = y

y = 9

Put y as 9 into the first equation and solve for x.

3x = (9)

Divide both sides by 3.

x = 9/3

x = 3

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A painter charges an initial fee of $50 and $30 for each hour of labor. Write a linear function to determine the total cost. How
il63 [147K]
The initial fee of $50 is essentially the y intercept because this is the value when x = 0 (x is the number of labor-hours). So b = 50.

The slope is m = 30 because each increase of 1 hour leads to the cost bumping up by 30 dollars. In other words, slope = rise/run = (change in cost)/(change in hours) = 30/1

So we plug m = 30 and b = 50 into the y = mx+b formula to get y = 30x+50

Replace y with f(x) to get f(x) = 30x+50

The linear function for the cost is f(x) = 30x+50

Note: Some books may use other letters (instead of x and f(x)), but the idea is still the same

Once you know the cost function, you replace x with 4.5 to find the amount it will cost to have a painter work for 4.5 hours.

f(x) = 30x+50
f(4.5) = 30*4.5+50
f(4.5) = 135+50
f(4.5) = 185

It will cost 185 dollars to have the painter work for 4.5 hours
7 0
3 years ago
Could anyone help me find the value of x for this question?
kirza4 [7]
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3 years ago
Given the slopes of three lines, m1 = 2, m2 = 5. m3 = -4, which line would you say is
bagirrra123 [75]

Compare the slopes of the 4 equations, which is the number in the term with "x".  The slope with highest absolute value is the steepest.  Positive slope means the function is ascending left to right, negative slope means it is descending left to right.  If you only care that it is the steepest, regardless of whether it is ascending or descending, then the answer is (D).

4 0
2 years ago
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How can you describe how far an object is from sea level?
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You just have to say that is is ___ (miles, yards) below sea level, or above sea level, i guess
7 0
3 years ago
It takes 42 cherries to make a cherry pie. If a chef bought 444 cherries, the last pie would need how many more cherries?
jeka94
It takes 42 cherries to make a cherry pie.
If a chef bought 444 cherries and you would like to know how many more cherries would the last pie need, you can calculate this using the following steps:

444 / 42 = 74 / 7 = 10 4/7 pies

4/7 * 42 = 24 cherries

42 - 24 = 18 more cherries

Result: The last pie would need 18 more cherries.
3 0
2 years ago
Read 2 more answers
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