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stich3 [128]
3 years ago
12

Combine like terms: 2y^2 + 2(4y^2 − 3)

Mathematics
1 answer:
nadya68 [22]3 years ago
8 0

Answer:

10y^2-6

Step-by-step explanation:

2y^2=2(4y^2-3)

2x4y^2=8y^2

2x(-3)=(-6)


2y^2+8y^2-6

10y^2-6

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Answer:

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Step-by-step explanation:

LCM of 3,4 and 6 is 12

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3 years ago
Can someone please explain to me how to do this
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Step-by-step explanation:

u should:

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and another one is:

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8 0
3 years ago
Unit 3 homework 2 geometry
ioda
Where is the question?
6 0
2 years ago
A teacher reviews 4-1/2 papers per hour, how many papers will that teacher review in 6-1/3 hours
MrRa [10]

Answer:

28\frac{1}{2}\ papers

Step-by-step explanation:

step 1

Convert mixed numbers to an improper fractions

4\frac{1}{2}=\frac{4*2+1}{2}=\frac{9}{2}

6\frac{1}{3}=\frac{6*3+1}{3}=\frac{19}{3}

step 2

we know that

A teacher reviews 9/2 papers per hour

using proportion

Find how many papers will the teacher review in 19/3 hours

Let

x-----> the number of papers

(9/2)/1=x/(19/3)

x=(19/3)(9/2)

x=28.5\ papers

Convert to mixed numbers

28.5=28\frac{1}{2}\ papers

5 0
3 years ago
Trent hikes up a hill at 4 km/h. He hikes back down at 6 km/h. The hiking trip took 3 hours. How much time did it take Trent to
erastovalidia [21]

t = time to hike up the hill

3-t is the time to hike down the hill

 so 4t = 6(3-t)

4t = 18-6t

10t = 18

t = 18/10 = 1.8 hours to hike up the hill

1.8 hours = 1 hour 48 minutes

4 0
3 years ago
Read 2 more answers
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