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STALIN [3.7K]
3 years ago
10

Maje a ten or hundred to add mentally

Mathematics
1 answer:
NeTakaya3 years ago
6 0
You can add numbers mentally if there are zero's behind them.
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Lisa and Krystal are planning trips to ten countries this year. They have 14 countries on their bucket list, in how many ways ca
Salsk061 [2.6K]

Answer:

1,001 ways for them to decide.

Step-by-step explanation:

The order in which they will visit the countries is not important, so we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

In this question:

10 countries from a set of 14. So

C_{14,10} = \frac{14!}{10!(14-10)!} = 1001

1,001 ways for them to decide.

8 0
3 years ago
Which expression is equivalent to 16³? <br>2⁷ <br>2¹¹ <br>2¹² <br>2⁶⁴​
aleksklad [387]

Answer:

2^12

Step-by-step explanation:

16^3 can be rewritten as (2^4)^3 which can then be rewritten as 2^12 by multiplying the exponents

7 0
2 years ago
Use multiplication to find three equivalent ratios (8 : 12 ) please help !!
larisa86 [58]

Answer:

16:24,

4:6

24:36

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
What is 14365 round to the nearear hundred​
Basile [38]

Answer:

a. 2 – 8 - [- 4 – (-6 + 3 -9)] X ( -10 ÷2) suprimir los signos de agrupacion

Step-by-step explanation:

8 0
3 years ago
Determine the zeros of the expression -16t^2-8t+24.
Lina20 [59]
-16t^2-8t+24=-8(2t^2+t-3)=-8(2t^2+3t-2t-3)\\\\=-8[t(2t+3)-1(2t+3)]=-8(2t+3)(t-1)\\\\\text{the zeros}\\\\2t+3=0\to t=-1.5\\t-1=0\to t=1\\\\Answer:\ \boxed{-1.5\ and\ 1}
6 0
3 years ago
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