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saveliy_v [14]
3 years ago
5

Simplify the expression: (2x2 + 3x - 7) + (5x2 - x +9)

Mathematics
2 answers:
wolverine [178]3 years ago
7 0

Answer:

7x^2 + 2x + 2

Step-by-step explanation:

<u>Step 1:  Combine </u>

<u />2x^2 + 3x - 7 + 5x^2 - x + 9

(2x^2 + 5x^2) + (3x - x) + (-7 + 9)

7x^2 + 2x + 2

Answer:  7x^2 + 2x + 2

Anvisha [2.4K]3 years ago
6 0
7x^2+2x+2 is the best answer
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What is the answer? I’m new here so please answer it?
11Alexandr11 [23.1K]

Answer:

$258 <u><em>I think</em></u>

Step-by-step Explanation:

3 0
3 years ago
How many different ways can you make 82 cents using current u.s. currency
andrew11 [14]
 <span>You can probably just work it out. 

You need non-negative integer solutions to p+5n+10d+25q = 82. 

If p = leftovers, then you simply need 5n + 10d + 25q ≤ 80. 


So this is the same as n + 2d + 5q ≤ 16 

So now you simply have to "crank out" the cases. 

Case q=0 [ n + 2d ≤ 16 ] 

Case (q=0,d=0) → n = 0 through 16 [17 possibilities] 
Case (q=0,d=1) → n = 0 through 14 [15 possibilities] 
... 
Case (q=0,d=7) → n = 0 through 2 [3 possibilities] 
Case (q=0,d=8) → n = 0 [1 possibility] 

Total from q=0 case: 1 + 3 + ... + 15 + 17 = 81 

Case q=1 [ n + 2d ≤ 11 ] 
Case (q=1,d=0) → n = 0 through 11 [12] 
Case (q=1,d=1) → n = 0 through 9 [10] 
... 
Case (q=1,d=5) → n = 0 through 1 [2] 

Total from q=1 case: 2 + 4 + ... + 10 + 12 = 42 

Case q=2 [ n + 2 ≤ 6 ] 
Case (q=2,d=0) → n = 0 through 6 [7] 
Case (q=2,d=1) → n = 0 through 4 [5] 
Case (q=2,d=2) → n = 0 through 2 [3] 
Case (q=2,d=3) → n = 0 [1] 

Total from case q=2: 1 + 3 + 5 + 7 = 16 

Case q=3 [ n + 2d ≤ 1 ] 
Here d must be 0, so there is only the case: 
Case (q=3,d=0) → n = 0 through 1 [2] 

So the case q=3 only has 2. 

Grand total: 2 + 16 + 42 + 81 = 141 </span>
3 0
3 years ago
The average weight of 8 marbles is 3.5 g. What is the total weight of the marbles?
professor190 [17]

Answer:

Take 8÷3.5. So the answer is aprominently 2.29.

8 0
3 years ago
What is the quotient of 8,187 ÷ 24?
adell [148]

Answer:

341.125

Step-by-step explanation:

8187/24

341.125

7 0
3 years ago
Does the point (3 , 4) lie on the line<br>y = 2x -1?​
belka [17]

Answer:

No

Step-by-step explanation:

y = 2x -1

Substitute the point into the equation

4 = 2(3) -1

4 = 6-1

4 =5

This is not a true statement so the point is not on the line

5 0
2 years ago
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