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marishachu [46]
3 years ago
6

Which pair of points lie on the line x+3y=21

Mathematics
1 answer:
igor_vitrenko [27]3 years ago
7 0
Set to y=mx+b form.
y =   - \frac{1}{3} x + 7
7 is a y intercept so (0,7) will be a point, and using the slope you can get another point, (1,4)
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The graph shows the amount of money paid when purchasing bags of peanuts at the zoo:
abruzzese [7]

Answer:

dive the cost by the number of bags for each dot:

4 / 1 = 4

8 / 2 = 4

12 / 3 = 4

This means each bag cost $4

The equation would be Y = 4X, because you would multiply each bag bought (X) by $4 to get the total cost (Y).

Step-by-step explanation:

BRAINLYIS TPLS

7 0
3 years ago
6.81 is what percent of 45.5
frosja888 [35]

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 45.5 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 45.5 is 100%, so we can write it down as 45.5=100%.

4. We know, that x is 6.81% of the output value, so we can write it down as x=6.81%.

5. Now we have two simple equations:

1) 45.5=100%

2) x=6.81%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

45.5/x=100%/6.81%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.


7. Solution for what is 6.81% of 45.5


45.5/x=100/6.81

(45.5/x)*x=(100/6.81)*x       - we multiply both sides of the equation by x

45.5=14.684287812041*x       - we divide both sides of the equation by (14.684287812041) to get x

45.5/14.684287812041=x

3.09855=x

x=3.09855

now we have:

6.81% of 45.5=3.09855

Hope this helps!

4 0
3 years ago
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Write the product as a mixed number 5x1 7/8​
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Answer:

10 5/8

Step-by-step explanation:

4 0
3 years ago
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The answer of<br>82.4 - 25​
Readme [11.4K]

Answer:

57.4

Step-by-step explanation:

82.4 - 25 is too easy, a calculator can solve this.

8 0
2 years ago
Genevieve is 3 years older than twice her brother’s age. Genevieve is 21 years old. Write an equation to find her brother’s age.
Simora [160]

Answer:

her brother is 9

Step-by-step explanation:

21-3=18   18 divided by 2 = 9

7 0
2 years ago
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