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valkas [14]
3 years ago
7

If a=2i-3j-k and b=i+4j+2k what us ab​

Mathematics
1 answer:
Masteriza [31]3 years ago
8 0

Answer:

2i²+5ij+3ik-12j²-10jk-2k²

Step-by-step explanation:

a=2i-3j-k

b=i+4j+2k

ab = (2i-3j-k) (i+4j+2k)

Multiply both bracket by expanding the bracket

2i(i+4j+2k)-3j(i+4j+2k)-k(i+4j+2k)

Multiply

2i²+8ij+4ik-3ij-12j²-6jk-ik-4jk-2k²

Collect like terms

2i²+8ij-3ij+4ik-ik-12j²-6jk-4jk-2k²

2i²+5ij+3ik-12j²-10jk-2k²

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11111nata11111 [884]

Answer:

$18.24 (C)

Step-by-step explanation:

15.20 x 0.20 = 3.04

3.04 + 15.20 = 18.24

Hope this helped!

8 0
3 years ago
How is a tangent different from a chord? Explain.
Strike441 [17]
Hello!

1. A chord is a ray joining 2 points situated on a given curve.
 
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5 0
4 years ago
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Soloha48 [4]
Where’s the question
8 0
3 years ago
Rewrite the following linear equation in slope intercept form.
Veronika [31]
Means solve for y=mx+b form
so
expand/distribute
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5 0
3 years ago
Danielle plans on making monthly payments into an account that earns 2.5% compounded monthly. If she wants $10,000 in 22 years,
Nesterboy [21]

Answer:

5,500

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