What is x? What is written in pencil is what my teacher gave me.

Solve the system or linear equations

Vanyuwa [196]

Answer:

37. {-1, -1}.

Step-by-step explanation:

I'll solve the first one . The other can be solved in a similar way. We can use the method of elimination.

x1 - x2 = 0

3x1 - 2x2 = -1

We can multiply the first equation by -2. We then have an equation containing + 2x2 so when we add this to the second equation the 2x2 will be eliminated

So the first equation becomes:

-2x1 + 2x2 = 0 Bring down the second equation:

3x1 - 2x2 = -1 Now adding, we get:

x1 + 0 = -1

so x1 = -1.

Now we substitute this value of x1 in the original first equation:

-1 - x2 = 0

-1 = x2

x2 = -1.

So the solution set is {-1, -1}.

If there are more than 2 equations you can use a combination of substitutions and eliminations.

8 0

3 years ago

A square and an Equilateral triangle have the same perimeter. Each side the triangle is 4 inches longer than each side of the sq

FinnZ [79.3K]

Perimeter if square is 2inch

3 0

4 years ago

Use the diagram to answer the following questions

n200080 [17]

Answer:

a. line AR, line AV

b. plane TSR, plane QTZ, plane RSZ

c. A, R, V

d. Q, R, S, T

e. QR

f. RQ, RS

Step-by-step explanation:

a. In addition to a name given to a line ("line p"), a line can be named by any two points on that line. Here, possible names are ...

line AR, line RA, line AV, line VA, line RV, line VR

any two of these names will appropriately answer this part of the question.

__

b. In addition to a name given to a plane ("plane W"), a plane can be named by any three points in that plane. Here, there are 5 named points in the plane (3 of which are collinear), so there are 54 possible different names for the plane. Some of them are ...

plane RST, plane TSR, plane QTZ, plane RSZ

__

c. In this diagram, each of the lines shown has three named points on it. Possible answers to this part of the question are ...

{Q, R, S} or {A, R, V}

__

d. Any four of the 5 named points shown in plane W will serve to answer this question. Possible answers are ...

{R, S, T, Z} or {Q, S, T, Z} or {Q, R, T, Z} or {Q, R, S, Z} or {Q, R, S, T}

__

e. Any pair of collinear points will name a line segment. Here, there are 12 possible names for line segments, including ...

QR, RQ, QS, SQ, RS, SR, AR, RA, ...

__

f. Opposite rays can be named by choosing the end point as the middle of three collinear points. Here, the only such middle point is R. We can name pairs of opposite rays on either line. The endpoint of the ray is named first.

{RA, RV} or {RQ, RS}

7 0

4 years ago

-35.9=y/0.1+0.1 please help me with this.

Artist 52 [7]

Answer:

358.9 I think

Step-by-step explanation:

6 0

2 years ago

1. Bob tried to answer the following question by finding the missing angle and rounding the answer to the nearest degree.

iren2701 [21]