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earnstyle [38]
2 years ago
10

HELP HELP WILL MARK BRAINLIEST

Mathematics
1 answer:
SashulF [63]2 years ago
4 0

Answer:

b. 10a³ - 11a - 3

Step-by-step explanation:

1. Expand 3(a³ - 2a - 5)

= 3a³ - 6a - 15

2. Add 7a³ - 5a + 12 and 3a³ - 6a - 15

7a³ + 3a³ = 10a³

-5a + -6a = -11a

12 + -15 = -3

3. Answer: b. 10a³ - 11a - 3

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Help Which answer do I pick?
dedylja [7]
The answer is ( C ) or 4/9
5 0
3 years ago
5 x 20 x a³ = 72900 what does a equal
Basile [38]

Answer:

9

Step-by-step explanation:

a^3=72900/100

a=(729)^1/3

a=9

3 0
3 years ago
The cost of the five most popular items at an airport gift shop include a $12.99 decorative mug, a $2.99 postcard, a $3.49 keych
Leno4ka [110]

Exchange rate refers value of a currency in another.The cost of the decorative mug is 83.98 China Yuan.

<h3>What is the exchange  rate?</h3>

The term exchange rate has to do with the value of a currency in another currency. Given the fact that international trade is the mainstay of the global economy, it is important that one currency should be converted to another for the purpose of the ease of doing business.

The dollar is often the international currency for trade. Its us always necessary to convert the dollar into the local currency of the country where the business is done using the correct exchange rate.

Now If I want to convert the cost of the decorative mug to China Yuan;

I already know that;

1 US dollar =  6.4651 China Yuan

12.99 US dollar = 12.99 US dollar  * 6.4651 China Yuan/1 US dollar

= 83.98 China Yuan

Hence, the cost of the decorative mug is 83.98 China Yuan.

Learn more about exchange rate:brainly.com/question/22996931

#SPJ1

3 0
2 years ago
a clock is circular in shape with diameter of 25 cm. find the length of the arc between the markings 12 and 5 rounded to the nea
Anestetic [448]

Answer:

  32.7 cm

Step-by-step explanation:

For central angle θ in radians, the arc length is given by ...

  s = rθ

The angle between 12 and 5 is 5π/6 radians, and the radius is 25/2 cm, so the arc length is ...

  s = (25/2 cm)(5π/6) = (125/12)π cm ≈ 32.7 cm

The arc length between the markings is about 32.7 cm.

3 0
3 years ago
What is 13/19 as a decimal rounded to the nearest hundredth
STatiana [176]

Answer:

0.68421052

then rounded its 0.68

Step-by-step explanation:

Find the number in the hundredth place  

8

and look one place to the right for the rounding digit  

4

. Round up if this number is greater than or equal to  

5

and round down if it is less than  

5

.

0.68

can  iplease lz have brainliest :0

7 0
3 years ago
Read 2 more answers
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