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Artyom0805 [142]
3 years ago
5

I need help on this question, It's for Algebra 1 Simplify the following expression. (7x2 + 4x - 7) + (4x2 - 6x + 4)

Mathematics
1 answer:
Drupady [299]3 years ago
8 0
You can only add like terms

exg
you can addd
2+4
2x+4x
2x^2+4x^2
2x^3+4x^3

but not
2+4x
2x^2+2x^3


so when adding like terms keep the exponent
4x+2x=6x
4x^3+2x^3=6x^3

(7x^2+4x-7)+(4x^2-6x+4)
get rid of the parenthasees
7x^2+4x-7+4x^2-6x+4
group like terms (x^2 with x^2 x with x, etc)

(7x^2+4x^2)+(4x-6x)+(-7+4)
add like terms
11x^2-2x-3

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Solve for x <br>4/5 equals x over 35​
Marina86 [1]

Answer:

I think x=28

Step-by-step explanation:

4/5 = x/35

5*7=35

4*7=28

5 0
3 years ago
Y = -2x - 4<br> y = 4x + 2
adoni [48]

The value of x and y in the given equation  is determined -1 and -2 respectively.

<h3>Value of x and y</h3>

The value of x and y can be determined by solving the two equations simultaneously.

y = -2x - 4  ----- (1)

y = 4x + 2   ----- (2)

solve (1) and (2) together

-2x - 4 = 4x + 2

-6x = 6

x = -1

y = 4(-1) + 2

y = -4 + 2

y = -2

Learn more about equations here: brainly.com/question/2972832

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6 0
2 years ago
If you must correctly select 3 numbers, each from 0 to 9, what's the probability if the order is important?
xxTIMURxx [149]
If they have to be different then
10 numbers total
9*8*7=504 ways
1/504

if they can be same numbers
9*9*9
729
1/729
3 0
4 years ago
There are 60 students going on a field trip to the chocolate factory. The students are from three different classes.
Bess [88]

Answer:

24+18+A=60.

Step-by-step explanation:

A=18

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4 years ago
14. a) Which graph represents the relation shown?
Anastaziya [24]

Answer: Graph A

Hope it helps!

8 0
3 years ago
Read 2 more answers
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