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almond37 [142]
3 years ago
14

Multiply 7i(5-9i) Please Help!

Mathematics
1 answer:
AleksandrR [38]3 years ago
3 0

1. Distribute

7i × 5 + 7i × -9i

2. Simplify 7i × 5 to 35i

35i + 7i × -9i

3. Simplify 7i × -9i to -63ii

35i - 63ii

4. Use the Product Rule

35i - 63i^2

5. Use the Square Rule

35i - 63 × -1

6. Simplify 63 × -1 to -63

35i - (-63)

7. Simplify brackets

35i + 63

8. Regroup terms

63 + 35i

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Answer:

x+(x-3)+(2*x)=41

Step-by-step explanation:

We know that the other two bills are based of of a constant value for fives. Therefore, the fives can be x. There are 3 less tens than fives, so the number of tens equals x-3. We double the number of fives to get the number of ones, so the number of ones equals 2 times x. When we add all 3 of those together, we get our total number of 41. If you want to solve, you have to solve for x, then you can plug it back into the formula. I hope this helps!

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Sum means that you add the components.

Set up the second half of the equation.

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