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hammer [34]
3 years ago
8

Simplify the expression (2i-5j)×(3i+4j)​

Mathematics
1 answer:
Alex_Xolod [135]3 years ago
3 0

Answer:

-6-7ji-20j^(2)

Step-by-step explanation:

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Find the measure of Angle C. thanks!!
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A store sells shirts at three prices only: $25, $30, and $35. How many different combinations are possible for the store to sell
Dvinal [7]

Answer:

  11

Step-by-step explanation:

The average price of the 20 shirts is 600/20 = $30 each. So, we know that we can sell 20 shirts for $30 each to reach the goal.

For each $25 shirt we sell, we must also sell a $35 shirt to make the average price of the sale be $30 per shirt. That is any or all of the 10 pairs of $30 shirts can be replaced by a ($25, $35) pair. So, there are 10 additional ways to reach the goal.

The total number of possible combinations of shirt sales is 1 +10 = 11.

5 0
3 years ago
A $40 shirt now selling for $28 is discounted by what percent?
motikmotik

Answer:

30%

Step-by-step explanation:

Think of this as converting a fraction. 28/40 to x/100. You do this because in the situation, 40 is 100 percent of the price. So 28 is <em>x</em> percent of 100.

You multiply 40 by 2.5 to get to 100, so multiply 28 by the same number to get x. 28 * 2.5 = 70.

So 28 is 70 percent of 40. But the question is asking by what percentage it is <em>discounted. </em>If it's now selling for 70%, it has been discounted 30%. So the answer is 30%

3 0
2 years ago
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