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notka56 [123]
3 years ago
10

Pls I need the Answer Q9

Mathematics
1 answer:
atroni [7]3 years ago
7 0

I believe you take the derivative and then set to zero.

4x + 8

set to zero:

4x + 8 = 0

x = -2

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Stella has 63 coins. The coins are a mixture of quarters and dimes. She has a total of $10.80. How many quarters and how many di
nika2105 [10]
Q + d = 63....q = 63 - d
0.25q + 0.10d = 10.80

0.25(63 - d) + 0.10d = 10.80
15.75 - 0.25d + 0.10d = 10.80
-0.25d + 0.10d = 10.80 - 15.75
-0.15d = -4.95
d = -4.95/-0.15
d = 33 <=== 33 dimes

q + d = 63
q + 33 = 63
q = 63 - 33
q = 30 <=== 30 quarters
7 0
3 years ago
Read 2 more answers
CAN SOMEONE PLEASE HELP ME!! THANK YOU
Mila [183]

Answer:

C

Step-by-step explanation:

I'm pretty sure it's C

7 0
3 years ago
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Which of the following must describe a irrational number? A. a number with a repeating or terminating decimal expansion B. a num
Olenka [21]

Answer:

D.

Step-by-step explanation:

A irrational number can be defined as those numbers which are real but can NOT be expressed in simple fractions. The term 'irrational' means 'a number which can not be expressed in ratio of two integers', 'no ratio.'

<u>When a irrational number is expressed in decimal, the numbers keep on expanding without repeating andd without terminating, which means it keeps on expanding infinitely.</u>

For example, π (pi) is an irrational number. When it is expressed in decimals it keeps on expanding non-repeatedly and unendingly.

Another example of an irrational number is √2.

Thus the correct statement that defines irrational number is option D.

5 0
3 years ago
Here is some information about a holiday.
maksim [4K]

Answer:

$625.6

Step-by-step explanation:

Information about the holiday:

7 night holiday

$340 per person

8% discount if you book before 31 March

Number of people Naseem booked the holiday for = 2

Date of booking of the holiday = 15 February

Total cost of the holiday per person = cost per person - discount before March 31

= $340 - 8% of $340

= 340 - 8/100 * 340

= 340 - 0.08 * 340

= 340 - 27.2

= $312.8

Total cost of the holiday for 2 persons = 2 × Total cost of the holiday per person

= 2 * $312.8

= $625.6

8 0
3 years ago
If the diameter of a pond is twelve feet what would be the area of the to of the cover?
spin [16.1K]
113.1

(If it needs to be rounded)
4 0
3 years ago
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