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Roman55 [17]
3 years ago
7

. If we subtract 4a–7ab+3b+12 from 12a–9ab+5b–3,then the answer is:

Mathematics
2 answers:
Dominik [7]3 years ago
6 0

Answer:

8a-16ab+2b-15, i think

Anika [276]3 years ago
3 0

8a-2ab+2b-15 is the answer

Step-by-step explanation:

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Help! I need the answer for this. 5x^2-16x+13=10
tatiyna

Answer:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

Exact Form:

x=1/5,3

Decimal Form:

x=0.2,3

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Answer 9 a and b and c
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Is the given value a solution to the equation?
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3 years ago
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PLS HELP MEEEEEE ( I don’t need to know the first one )
Hunter-Best [27]

Answer:

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Step-by-step explanation:

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3 years ago
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the length of a rectangle is 4 meters less than twice its width. The area of the rectangle is 70. Find the dimensions of the rec
Savatey [412]

Answer:  The width is 7 meters. The length is 10 meters.

Step-by-step explanation:   Area = Length × width

Length is 2w - 4  

Substitute that value for length, then solve for w.

70 = w(2w - 4)

70 = 2w² - 4w  reorganize to quadratic equation form

2w² - 4w -70 = 0   These are All even numbers; factor out 2 (divide all by 2)

w² - 2w - 35 = 0  factor this

(w - 7)(w + 5)    set each factor = 0 and calculate the value of w.

w+5=0  w= -5  (disregard this one because dimensions of real rectangles can't be negative)

w - 7 = 0  w = 7   <u>The width is 7</u>

Substitute into the original expressions to get the value of Length.

2(7) -4 = L    14 - 4 = L  The<u> Length is 10.</u>

Check by substituting into the original equation:

w × 2w -4 = 70

7 × 2(7) -4 = 70

7 × 10 = 70    TRUE!

w

6 0
3 years ago
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