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navik [9.2K]
3 years ago
14

Subtracting a number is the same as adding its opposite.

Mathematics
1 answer:
statuscvo [17]3 years ago
4 0

Answer:

in first question, answer is 12

in second question, answer is -12

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A computer company makes a rectangular screen with a diagonal of 20 inches. The width of the screen is 4 inches less than its le
LenaWriter [7]

<span>  x^2 +(x-4)^2 =20^2</span>

<span>  x^2 +(x-4)^2 =400</span>

x^2 +(x-4)^2 -400=0

factor:

2x^2-8x-384=0

Factor the 2 out of 2X^2

2(x-16) (x+12) =0

<span> Divide both sides by 2</span>

(x-16) (x+12) =0

X=16 , x=-12

<span> Number cannot be negative so x=16</span>


5 0
3 years ago
Read 2 more answers
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Cd can interlock with the quadrilateral
8 0
3 years ago
What is the coefficent of 2x^2
Svetach [21]

Answer:

2

Step-by-step explanation:

The coefficient is the number attached to the variable, which in this case is 2.

7 0
3 years ago
The first play of a football game resulted in a loss of 12 and 1/2 yards . Then a penalty resulted in another loss of 5 yards .W
Irina-Kira [14]
<span>To find the total loss for this play, take the two values, find their signs (positive or negative), then sum them. In this case, the play itself resulted in a movement of -12.5 yards, and the penalty added a -5 yard movement to the result. This would lead to a total movement of (-12.5 + [-5]), or -17.5 yards.</span>
4 0
3 years ago
What is (2x^2+6x-3) added to (2x^3-3x+2)?
Bas_tet [7]
2x² + 6x - 3 + 2x³ - 3x + 2

Combine like terms

2x³ + 2x² + 6x - 3x - 3 + 2

Final answer:
2x³ + 2x² + 3x - 1
8 0
3 years ago
Read 2 more answers
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