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o-na [289]
3 years ago
5

Simplify (7x2 - 2x + 9) + (3x2 + 15x – 4).

Mathematics
2 answers:
VikaD [51]3 years ago
5 0

Hey! Your answer for this is

7x^2 + 3x^2 = 10x^2

-2x + 15x = 13x

9 - 4 = 5

Hence, 10x^2 + 13x + 5.

Hope this helps!

goldfiish [28.3K]3 years ago
3 0

Answer:

A=10

Step-by-step explanation:

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About how many cubes were used to make this figure? A. about 40 B. about 70 C. about 100 D. about 140
natta225 [31]

Answer:

Around 100,i.e. 105

Step-by-step explanation:

In the given cube

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⇒Number of cubes used to make that big cube= 7*5*3

                                                                               = 105

Hence, option D (around 100) is the correct answer

4 0
3 years ago
A rectangular soccer field is twice as long as it is wide. If the perimeter of a soccer field is 300 yards, what are the fields'
Masteriza [31]
<span>A rectangular soccer field is twice as long as it is wide. If the perimeter of the soccer field is 300 yards , what are its dimensions?
I know the basic formula is 2W+2L=300 but i am not sure where to go from there...
-----
Equations:
2W + 2L = 300
L = 2W
----
Substitute for "L" and solve for "W": 
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----
Solve for "L":
L = 2W
L = 100 yds (length)
========================
Cheers.
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Step-by-step explanation:

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Answer:

solution

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219

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