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Kamila [148]
3 years ago
7

Solve by addition method 3x+y=8 2x-y=7

Mathematics
1 answer:
Vinil7 [7]3 years ago
7 0

Answer:

(3,-1)

Step-by-step explanation:

So we have the system of equations:

3x+y=8\\2x-y=7

As directed, add straight down. The y-variable will cancel:

5x=15

Now, divide both sides by 5. The left cancels:

x=3

So x is 3.

Now, substitute 3 for x in either of the equations:

3x+y=8

Substitute 3 for x:

3(3)+y=8

Multiply:

9+y=8

Subtract 9 from both sides:

y=-1

So, our answer is: x=3, y=-1 or (3,-1).

And we are done :)

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3 years ago
Which Value Is The Eighth Term In The Sequence? <br><br> A. -3125<br> B. -125<br> C. -625
statuscvo [17]

Answer:

C

Step-by-step explanation:

Substitute n = 8 into the explicit rule

a_{8} = - \frac{1}{125} × 5^{7}

                        = - \frac{1}{5^{3} } × 5^{7}

                       = - 5^{4} = - 625 → C

6 0
3 years ago
Draw a line representing the "rise" and a line representing the "run" of the line. State
Mamont248 [21]

Answer:

Slope = 1

This is becuase the rise is 1 and the run is 1.

5 0
3 years ago
What is the area of a circle if the circumference is 29
Kruka [31]

Answer:

67 square units

Step-by-step explanation:

Circumference/pi = diameter

29/3.14 = 9.24

Radius = 9.24/2 = 4.62

A = pi * r^2

A = 3.14 * 4.62^2 = 67 square units

8 0
2 years ago
Hey can you please help me posted picture of question :)
ladessa [460]
The graph is touching the x-axis at x= 2 and is turning away.

When a graph exhibit such a behavior at a root, we say that the multiplicity of the root is 2. So the roots of the polynomial are x = 2 and x = 2. The factors of the polynomial are (x - 2) and (x - 2)

The polynomial thus can be written as product of its factors as (x-2)(x-2)

So the correct answer to this question is option B
7 0
4 years ago
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