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Ludmilka [50]
3 years ago
8

Expand and simplify (n-2)(3n+7) + 2n(2n+3)

Mathematics
1 answer:
KonstantinChe [14]3 years ago
6 0
3n^2+7n-6n-14+4n^2+6n= 7n^2+7n-14

Hope that helps and best of wishes!
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(0,2) is the y-intercept
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19 is 25% of what number?
zepelin [54]

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19/25 * 100 = 76%

Step-by-step explanation:

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The first side of a triangle is 3 inches shorter than the second side, and 2 inches longer than the third side. How long is each
ziro4ka [17]

Answer:

the length of the first side of the triangle is \frac{28}{3}\ in

the length of the second side of the triangle is \frac{37}{3}\ in

the length of the third side of the triangle is \frac{19}{3}\ in

Step-by-step explanation:

Let

x-----> the length of the first side of a triangle

y----> the length of the second side of a triangle

z---> the length of the third side of a triangle

we know that

x=y-3

y=x+3 -----> equation A

x=z+3

z=x-3  -----> equation B

The perimeter of the triangle is equal to

P=x+y+z

P=28\ in

so

28=x+y+z -----> equation C

substitute equation A and equation B in equation C

28=x+(x+3)+(x-3)

solve for x

28=3x

x=\frac{28}{3}\ in

Find the value of each side

the first side of a triangle is x

x=\frac{28}{3}\ in

the second side of a triangle is y

y=\frac{28}{3}+3=\frac{37}{3}\ in

the third side of a triangle is z

z=\frac{28}{3}-3=\frac{19}{3}\ in

7 0
3 years ago
A rocket travels at a rate of 160 meters in 3 seconds. What is the speed of the rocket in meters per second? Plz Help!! A.60 m/s
jekas [21]

Answer:

the answer is B

Step-by-step explanation:

do 160/3

4 0
3 years ago
What is the value of the expression: 2/10 ÷ 5/4?<br> 1/50<br> 4/10<br> 8/50<br> 1/2
lana66690 [7]

Answer:

8/50

Step-by-step explanation:

2/10 x 4/5 = 8/50

Hope that helps!

8 0
3 years ago
Read 2 more answers
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