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3 years ago

10

Can someone create two expressions that are equivalent to 3(4j + 4 + j). Please show all steps in your work.

2 answers:

NNADVOKAT [17]3 years ago

7 0

Answer:

12j + 12 + 3j or 15j + 12.

Step-by-step explanation:

NNADVOKAT [17]3 years ago

4 0

12j + 12 + 3j or 15j + 12. This is because if you use Distributive Property to distribute the 3, then you multiply 3 by all the number inside the parentheses. I have two expressions because once you get get the answer after you use the property, then you can combine like terms, such as 12j and 3j which is 15j. Hope this helps!

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Liz runs 8 feet per second. Katie runs 350 feet in 31 seconds. Katie runs 350 feet in 31 seconds. Stephanie runs 1 mile in 388 s

VikaD [51]

Answer: Stephanie is the fastest

Step-by-step explanation:

Here we have to find who runs faster:

Liz:

$8 ft/s$

Katie:

$\frac{350 ft}{31 s}=11.29 ft/s$

Stephanie:

$\frac{1 mile}{388 s}. \frac{5280 ft}{1 mile}=\frac{5280 ft}{388 s}=13.60 ft/s$

Noah:

$\frac{541 ft}{1 min}. \frac{1 min}{60 s}=9.01 ft/s$

As we can see after comparing, Stephanie is the fastest, since she travels more distance in less time.

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3 years ago

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Rufina [12.5K]

Answer:

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Step-by-step explanation:

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3 years ago

xeze [42]

Answer:

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Step-by-step explanation:

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6 0

3 years ago

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List all the subsets of (3,4,7)

viva [34]

Answer:

Subsets that have 3 items: {3, 4, 7} which is the original set. Any set is a subset of itself.

Step-by-step explanation:

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3 years ago

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Solve for x? 3x^2-6x-2=4+5x-7x^2

hodyreva [135]

Answer:

3/2 or -2/5

Step-by-step explanation:

Get everything on one side because this is a quadratic....

subtract 4 on both sides

subtract 5x on both sides

add 7x^2 on both sides

this gives us:

10x^2-11x-6=0

Now we can try to factor or just hop right into the quadratic formula

D=b^2-4ac=121-4(10)(-6)=121+240=361

sqrt(D)=sqrt(b^2-4ac)=19 where this is the sqrt(discriminant) so it would have factored nicely since this come out to be a whole number.

Anyways the quadratic formula says to do x=(-b (pm) sqrt(D))/(2a)

*(pm) means plus or minus*

So x=(11 (pm) 19)/(20)

So x=30/20=3/2 or -8/20=-2/5

(do you want to show factored form and do it that way)

3 0

3 years ago

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