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3 years ago

Explain how to determine if the two expressions are equivalent using x = 6 and x = 2.

1 answer:

3 0

You substitute the variables with the number into the equations and set the equations equal to each other and solve ( systems of equations )

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Algebraic expression and identity 1)simplify the following (3a+b)3 +(3a-b)3

mylen [45]

Answer:

$(3a+b)^3+(3a-b)^3=54a^3+18ab^2$

Step-by-step explanation:

Given: $(3a+b)^3+(3a-b)^3$

Formula: $x^3+y^3=(x+y)(x^2-xy+y^2)$

$(x+y)^2=x^2+2xy+y^2$

$(x-y)^2=x^2-2xy+y^2$

$x\rightarrow 3a+b$

$y\rightarrow 3a-b$

$\Rightarrow (3a+b+3a-b)((3a+b)^2-(3a+b)(3a-b)+(3a-b)^2)$

$\Rightarrow (6a)(9a^2+b^2+6ab-9a^2+b^2+9a^2+b^2-6ab)$

$\Rightarrow (6a)(9a^2+3b^2)$

$\Rightarrow 54a^3+18ab^2$

5 0

3 years ago

6. April works as an emergency medical technician (EMT) and is a photographer. As an EMT she earns $19 per

ElenaW [278]

Answer: 19t +100

Step-by-step explanation:

19t +100 where t is the number of hours she worked and the extra 100 dollars is the money she got from her friend.

6 0

4 years ago

Read 2 more answers

Compare the two leagues and predict which league would be more likely to win a game.

Inessa [10]

Answer:

The team from the second league would be more likey to win becasue teams in taht league have more consistent, and mostly greater, numbers of home runs and winning games. Data for teams in the second league also do not show any outliers.

5 0

3 years ago

Read 2 more answers

Derek bought a cloth for rs 950 .He spent rs 150 for stitching a shirt and sold it at a gain of rs 375 . Find the selling price

jekas [21]

Answer:

$1473

Step-by-step explanation:

cost of cloth= rs.950

He spent rs.150 for stitching a shirt

total cots= 950+150

total cost=1100

gain= rs.375

we know that

gain= selling price- cost price

substitute

375= selling price- 1100

selling price= 1100+373

selling price=$1473

Hence the selling price is $1473

5 0

3 years ago

The radius of a circle is 1 millimeter. What is the circle’s circumference?

tia_tia [17]

Step-by-step explanation:

Circumference is

2 x pi x r

r= 1

plug and chug

7 0

3 years ago