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Readme [11.4K]
3 years ago
15

Find a • b if a=3i+8j and b=-0.5-4j

Mathematics
2 answers:
Marina CMI [18]3 years ago
6 0

Answer: -8j + 3i

Step-by-step explanation:

3i + 8j · (- 0.5) - 4j

3i-8j · 0.5 - 4j

3i-4j-4j

3i-8j

-8j+3i

Hope this helps

AnnZ [28]3 years ago
6 0

Answer:

−1.5i−12ij−4j−32j2

Step-by-step explanation:

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Help ! solve the following system of equations <br><br> -9x+2y=-13<br><br> 2x-9y=20
Stella [2.4K]

Answer: x = 1, y = -2

Step-by-step explanation:

-9x+2y=-13

x= 13/9 + 2/9y

2x-9y=20

2(13/9+2/9y)-9y=20

<em>Substitute y with -2.</em>

<em />

x= 13/9+2/9(-2)

<em>After solving you'll see that 1 is a possible solution for x.</em>

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Check your answer

-9x+2y=-13

-9x1+2(-2) = -13

2x-9y=20

2x1-9(-2) = 20

-13 = -13

20 = 20

Therefore, x=1 and y=-2

5 0
3 years ago
Please help me i need to complete this by tomorrow
lisov135 [29]

Answer:

Step-by-step explanation: Need to work out your scale factor which is 1.5.

8 * 1.5 = 12

CE = 12

12 * 9 = 108/2 = 59 that is the area of triangle ACE

8 * 6 = 48/2 = 24 that is the area of triangle BCD

ACE - BCD = ABDE

59 - 24 = 35cm^2

8 0
2 years ago
F(n+1)=f(n)-3 f(1)=15
Trava [24]

Answer:

f(n+1) = 13

Step-by-step explanation:

  • We know that f(1) = 15
  • So we can substitute this for f(n)-3
  • With this:
  1. f(n+1) = f(1) -3
  2. f(n+1) = 15-2
  3. f(n+1) = 13
5 0
3 years ago
a baseball team has home games on Thursday and Saturday. the two teams together earn $4746.50 for the team. Thursdays game gener
baherus [9]
Saturday: Earned 2,426.75
Thursday: Earned 2,319.75

For a total of 4746.50
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3 years ago
PLEASE ANSWER FAST!!!!!<br><br> Word problem ideas for 4x+10 2(x-6)
RUDIKE [14]

Step-by-step explanation:

Simplify 2(x-6)

2x+2•-6

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4x+10=2(×-6)=2x-12

7 0
3 years ago
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