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Sloan [31]
3 years ago
15

Is point (2,1) on the the line represented by the equation x+2y=5

Mathematics
2 answers:
MrMuchimi3 years ago
7 0
(x,y)
(2,1)
that means x=2 and y=1 is true, or is it?
just subsitute 2 for x and 1 for y and see if you get a true statement

2+2(1)=5
2+2=5
4=5
false
it is not on the line
Sphinxa [80]3 years ago
6 0
To check if this point lies on the line, plug in a 2 for x and a y for 1 and solve

x+2y=5
2+2(1)=5
4=5

Since this statement isn't true, then the point doesn't lie on the line

Hope this helps

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5 0
3 years ago
If line a is perpendicular to line b and the slope of line a is 7 whats the slope of line b
amm1812

Answer:

If a line is perpendicular to another line, that means that the slope is completely opposite that of the original line.  The first thing that we do to the slope is we negate the number which means that if we have a slope of -7 our slope because 7 in this step.  In our case our slope is 7 so in this step it becomes -7.

Moving onto the second part which is to get the reciprocal of the number which means that if we have \frac{1}{2} then we would switch it to 2.  In our case our number is -7 so we would make that into a fraction like this -\frac{1}{7}.

In conclusion, our final slope of the perpendicular line is -\frac{1}{7}.

<u><em>Hope this helps!  Let me know if you have any questions</em></u>

8 0
2 years ago
Read 2 more answers
L.B. Johnson Middle School held a track and field event during the school year. The chess club sold various drink and snack item
elena55 [62]

Answer: $5.5

Step-by-step explanation:

Here is the complete question:

L.B. Johnson Middle School held a track and field event during the school year. The chess club sold various drink and snack items for the participants and the audience. Altogether, they sold 486 items that totaled $2,673 a. If the chess club sold each item for the same price, calculate the price of each item. b. Explain the value of each digit in your answer to a using place value terms

Item sold = 486

Total amount = $2673

Price of each item = Total amount/items sold

= 2673/486

= $5.5

Each item costs $5.5.

5.5 = 5 units and 5 tenths.

The first number after the decimal point by the right is the tenths.

8 0
4 years ago
Write 6 x 10-2 in standard notation.
pochemuha

Answer:

1/600 or 0.00166666 in decimal

Step-by-step explanation:

6*10^-2=1/(6*10^2)=1/(6*100)=1/600

8 0
3 years ago
What is the remainder when the polynomial 8x^2+4x-3 is divided by 2x-1?
Yuliya22 [10]
The answer is 1
hope I can help u

5 0
4 years ago
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