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Elan Coil [88]
3 years ago
14

Giving that ai +bj 5i-2j are perpendicular find the value of a if b=3​

Mathematics
1 answer:
Nonamiya [84]3 years ago
6 0

Answer:

a = \frac{6}{5}

Step-by-step explanation:

Given

ai + bj and 5i - 2j are perpendicular and b = 3, that is

ai + 3j and 5i - 2j are perpendicular, then

The scalar product = 0 , that is

5a - 6 = 0 ( add 6 to both sides )

5a = 6 ( divide both sides by 5 )

a = \frac{6}{5}

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I don't get prime and composite please send me an example
Neko [114]
2 IS THE ONLY EVEN PRIME NUMBER   a prime number can only be divided by 1 or itself. 4 is a composite and 5 is a prime  hope this helps you.
4 0
3 years ago
Read 2 more answers
Need someone to help that KNOWS the ANSWER PLSSS HELP
amm1812

Answer:

72 inches

Step-by-step explanation:

The perimeter is the sum of the outside "fence"

The side on the left that is not marked is 19-11 = 8

And the side on the top that is not marked is 17-10 = 7

Summing up the sides starting at 19 and going clockwise

19+17+11+7+8+10 =

72 inches

5 0
2 years ago
Multiply.<br>(2x-5) (3x-7)​
Naya [18.7K]

Answer:

6x^2 -29 +35.

Step-by-step explanation:

use the FOIL method(First, Outer,Inner, and Last.)

2x x 3x=6x^2.

2x x -7=-14x.

-5 x 3x =-15x.

-5 x -7=35.

= 6x^2 -14x -15x+35

6x^2 -29x +35.

4 0
3 years ago
I am a square. One of my side is 9 feet long. What is my area?
Stella [2.4K]

Hello from MrBillDoesMath!

Answer:

81 ft^2

Discussion:

The area of a square is (length of a side)^2.  In this case,

Area = 9^2 = 81


Regards,  

MrB

P.S.  I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!


8 0
3 years ago
Compare -15/4 and -3 3/8
muminat

Answer:

-15/4 > -3 3/8

Step-by-step explanation:

I converted -15/4 into a mixed number with a denominator of 8. First, I made it a mixed number (-3 1/4) and then I converted it to eighths (-3 2/8). Compared to -3 3/8, -15/4 is larger.

4 0
3 years ago
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