2 years ago

Solve (x² - 16)(x² - 9) = 0

Mathematics

1 answer:

Karo-lina-s [1.5K]2 years ago

4 0

Answer:

x=-4,4,-3,3

Step-by-step explanation:

Factor by the difference of two squares

${x}^{2} - {y}^{2} = (x + y)(x - y)$

${x}^{2} - 16 = (x + 4)(x - 4) \\ {x}^{2} - 9 = (x + 3)( x - 3)$

$(x + 4)(x - 4)(x + 3)(x - 3) = 0$

Therefore, our answer is x = -4,4,-3,3

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In one U.S city, the taxi cost is $2 plus $0.60 per mile. If you are traveling from the airport, there is an additional charge o

anzhelika [568]

Answer:

60 miles

Step-by-step explanation:

Let

x ----> the number of miles

we know that

The number of miles multiplied by $0.60 per mile plus $2 plus the charge of $5.50 for tolls (because you are travelling from the airport) must be equal to $43.50

The linear equation that represent this problem is

$0.60x+2+5.50=43.50$

Solve for x

Combine like terms left side

$0.60x+7.50=43.50$

subtract 7.50 both sides

$0.60x=43.50-7.50$

$0.60x=36$

divide by 0.60 both sides

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2 years ago

a bakery has 4 trays with 16 muffins on each tray the bakery has 3 trays of cupcakes for 24 cupcakes on each tray if 15 cupcakes

stira [4]

64 muffins and 57 cupcakes. Since no muffins were sold, the amount of muffins wouldn't change. Since 15 cupcakes were sold, you just subtract 15 from the total amount of cupcakes (3 * 24 = 72; 72 - 15 = 57).

7 0

3 years ago

Read 2 more answers

Evaluate p+23 for p=8

malfutka [58]

Answer:

Step-by-step explanation:

p = 8

p + 23

= 8 + 23

= 31

31 is the answer.