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Sphinxa [80]
3 years ago
5

Which of these statements about algebra are true?

Mathematics
2 answers:
9966 [12]3 years ago
8 0

Answer:

  1. Algebra uses abstract symbols to represent concrete elements in the real world.
  2. Many great mathematicians were also philosophers.
  3. The same variable can represent two different unknowns in two different algebraic expressions.

Step-by-step explanation:

Novay_Z [31]3 years ago
6 0

Yes, algebra uses abstract symbols to represent concrete elements in the real world.

No, in an algebraic equation, the same variable cannot represent two different unknowns.

Yes, many great mathematicians were also philosophers.

No, An algebraic expression doesn't contains an equal sign, but an algebraic equation does.

No, if the expressions are in the same set. Yes, if they are not. (The same variable can represent two different unknowns in two different algebraic expressions.)

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Help please with #3
Alenkasestr [34]

Answer: x = 2a over b + c

Step-by-step explanation:

1. Multiply both sides by two. This cancels out 2 and turns a into 2a. It should look like 2a = bx + cx

2) Since both b and c have x’s, we turn it into (b + c)x

3. Then divide both sides by b+c to get 2a over b + c = x

6 0
3 years ago
Find the equation of the line that passes through the points (-800, 200) and<br> (-400, 300)
alisha [4.7K]

The distance (d) between two points (x1,y1) and (x2,y2) is given by the formula

d = √  ((X2-X1)2+(Y2-Y1)2)

d = √ (-400--800)2+(300-200)2

d = √ ((400)2+(100)2)

d = √ (160000+10000)

d = √ 170000

The distance between the points is 412.310562561766

The midpoint of two points is given by the formula

Midpoint= ((X1+X2)/2,(Y1+Y2)/2)

Find the x value of the midpoint

Xm=(X1+X2)/2

Xm=(-800+-400)/2=-600

Find the Y value of the midpoint

Ym=(Y1+Y2)/2

Ym=(200+300)/2=250

The midpoint is: (-600,250)

Graphing the two points, midpoint and distance

P1 (-800,200)

P2 (-400,300)

Midpoint (-600,250)

The length of the black line is the distance between the points (412.310562561766)

6 0
3 years ago
Read 2 more answers
Factor the expression completely.<br> -6.75 +2.25x
NARA [144]

Answer:

2,25[-3 + x]

Step-by-step explanation:

The Greatest Common Divisor [GCD] is 2,25; you factor that out, leaving the remaining result inside the brackets.

I am joyous to assist you anytime.

4 0
3 years ago
Dirk plants 12 seedlings in 8 min.
Slav-nsk [51]
The answer would be b 105
8 0
3 years ago
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What is .253 repeating as a fraction
faust18 [17]

.253 as a fraction would be

253/100

7 0
3 years ago
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