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vichka [17]
3 years ago
14

S e n d h e l p (Thank u in advance)

Mathematics
1 answer:
balandron [24]3 years ago
3 0

Answer:

The answer to your question is the letter B. 20x² - 4x - 16

Step-by-step explanation:

Data

length = 5x + 4

width = 4x - 4

Formula

  Area of a rectangle = length x width

Substitution

  Area of a rectangle = (5x + 4)(4x - 4)

Expand

  Area of a rectangle = 20x² - 20x + 16x - 16

Simplify like terms

   Area of a rectangle = 20x² - 4x - 16

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Last year, 120 new houses were built in a neighborhood. So far this year, 56 of them have been sold. How many new houses have be
anzhelika [568]
56 of them have been sold...
right?
8 0
3 years ago
Read 2 more answers
Factor the expression 27-9x+15y
Debora [2.8K]
-3(3x-5y-9) that’s the factored expression
5 0
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Twice the sum of a number and 5 is equal to three times the difference of the number and 2
Alexxx [7]

Answer:16

Step-by-step explanation:

Let the number be X

Twice the sum of a number and 5

= 2X+5

Three times the difference of the number and 2

= 3(X - 2)

Since Twice the sum of X and 5 is equal to three times the difference of the X and 2, This means

2(X + 5 )= 3(X - 2)

2X +10 = 3X - 6

3X -2X = 10 + 6 = 16

X = 16

Check

2×(16+5) =3×(16-2)

2×21 = 3×14

42 = 42

3 0
3 years ago
About 7% of the population of a large country is nervous around strangers. If two people are randomly selected, what is the prob
chubhunter [2.5K]

Answer:

Probability both are nervous around strangers = 0.0049

Probability at least one is nervous around strangers = 0.1302

Step-by-step explanation:

Let probability a person selected in the population is nervous around strangers = P

                                        P = 7%

                                        P = \frac{7}{100}

                                        P = 0.07

Let probability a person selected in the population is not nervous around strangers = P'

                                         P' = 1 - P

                                         P' = 1 - 0.07

                                         P' = 0.93

(i) probability of the first person selected is nervous around strangers = P

   probability of the second person selected is nervous around strangers = P

   Probability both are nervous around strangers = (P × P)

                                         = 0.07 × 0.07

                                         = 0.0049

(ii) Probability at least one is nervous around strangers = ( probability the first person is nervous around strangers AND the second person is not nervous around strangers ) OR ( probability the second person is nervous around strangers AND the first person is not nervous around strangers)

This implies,

Probability at least one is nervous around strangers = (P × P') or (P × P')

                                        = (0.07 × 0.93) + (0.07 × 0.93)

                                        = 0.0651 + 0.0651

                                        = 0.1302

5 0
4 years ago
Express the square root of -8 in i notation
Ray Of Light [21]

Answer:

2iroot2

Step-by-step explanation:

8 0
3 years ago
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