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PolarNik [594]
3 years ago
14

Evaluate using suitable property. Write the needed steps. Use proper brackets. 20 x 399 x 5

Mathematics
1 answer:
Reil [10]3 years ago
6 0

Step-by-step explanation:

20 x 399 x 5

= (20×5) × 399

= 100×399

= 39,900

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An aircraft has a maximum of 30 first class seats and 220 economy seats.
Sidana [21]

Answer:

x\leq 30

y\leq 220

240x+120y

Step-by-step explanation:

Let

x ----> the number of first class seats

y ----> the number of economy class seats

we know that

An aircraft has a maximum of 30 first class seats

so

x\leq 30

An aircraft has a maximum of 220 economy seats

y\leq 220

A flight will be cancelled if the money taken for the seats is less than $28,800.

so

240x+120y

therefore

Three inequalities that represent the situation are

x\leq 30

y\leq 220

240x+120y

8 0
3 years ago
. The table shows the total amount of money Cal had in his savings account after his initial deposit of $50. Write a
Vinvika [58]

Answer: A

Step-by-step explanation:

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7 0
3 years ago
(а+1) (а+2)-(а+1)(а-2)-а-1
umka21 [38]
If you would like to calculate (a + 1) * (a + 2) - (a + 1) * (a - 2) - a - 1, you can do this using the following steps:

(a + 1) * (a + 2) - (a + 1) * (a - 2) - a - 1 = a^2 + 2 * a + 1 * a + 2 - (a^2 - 2 * a + 1 * a - 2) - a - 1 = a^2 + 3 * a + 2 - a^2 + 2 * a - 1 * a + 2 - a - 1 = 3 * a + 3

The correct result would be 3 * a + 3.
7 0
3 years ago
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Can someone help me pls ?
PolarNik [594]

The correct way to write 1/4% as a decimal is 0.0025.

The reporter's likely error was that he did not notice the percent sign, thus saying that 1/4% is equivalent to 0.25.


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3 years ago
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What is the unit rate of 25 rulers in 5 groups
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The answer is 20 if that is an option
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