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Furkat [3]
3 years ago
9

When adding two numbers, such as 123 and 423, care is taken to first line them up and then add like digits. How does expanding t

his expression to [(1 × 10^2 ) + (2 × 10^1 ) + (3 × 10^0 )] + [(4 × 10^2 ) + (2 × 10^1 ) + (3 × 10^0 )] make the operation more like a polynomial addition problem?
Mathematics
1 answer:
Ivanshal [37]3 years ago
4 0
Since a polynomial is where we have like terms such as (1 x 10²) and (4 x 10²), we can add these up using the distributive property to get (5 x 10²) but still keep the 10². For example, it's similar to if we had 2x²+3x²=5x². The x² is still there, but we add up the 2 and 3. Similarly, we can add these up for 10^1 and 10^0
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One angle of a triangle has a measure of 66. The measure of the third angle is 57 more than 1/2 the measure of the second angle.
alexandr402 [8]
180=66+x+(57+\frac{x}{2})
360=132+2x+114+x
360=246+3x
3x=114
x=38

The second angle is 38deg. The third angle is 76deg.

To check: 66+38+76=180
                          180=180 ---> Checks TRUE.
8 0
3 years ago
Kevin is taking a taxi from the airport to his home. There is a $6 flat fee for riding in the taxi. In addition, Kevin must also
Andrej [43]

Answer:

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Step-by-step explanation:

7 0
3 years ago
Factor completely 2x3 + x2 - 18x - 9
melisa1 [442]
Factor the following:
2 x^3 + x^2 - 18 x - 9

Factor terms by grouping. 2 x^3 + x^2 - 18 x - 9 = (2 x^3 + x^2) + (-18 x - 9) = x^2 (2 x + 1) - 9 (2 x + 1):
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Factor 2 x + 1 from x^2 (2 x + 1) - 9 (2 x + 1):
(2 x + 1) (x^2 - 9)

x^2 - 9 = x^2 - 3^2:
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Factor the difference of two squares. x^2 - 3^2 = (x - 3) (x + 3):

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7 0
3 years ago
Read 2 more answers
Write an inequality to model the situation.<br><br><br> A number exceeds 21
mezya [45]
It could be x > 21 im not sure
8 0
2 years ago
Calculate the gradient of the straight line which joins A(2,-3) and B(6,9)<br>​
Pie

Answer:

Gradient: m = 3

Step-by-step explanation:

m = change in y/change in x

m = \frac{Y2-Y1}{X2-X1}

m = \frac{9-(-3)}{6-(2)}

m = 12/4

m = 3

5 0
3 years ago
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