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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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S+1/4s=-6-3/2<br> provide your answer
Ilya [14]

Answer:

  s = -6

Step-by-step explanation:

Combining terms, we get ...

  (5/4)s = -15/2

Multiplying by 4/5 gives ...

  s = (4/5)(-15/2)

  s = -6

8 0
4 years ago
Help please...........<br><br><br>1. y = 3 x<br> y = -8x<br><br><br>2. y = - 7x<br> y =-4x - 12
geniusboy [140]
1. -8x = 3x

-11x = 0

x= 0

y= 3(0)= 0

(0, 0)

2. -7x = -4x - 12

-3x = -12

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y = -7(4)= -28

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7 0
3 years ago
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Dylan and his friend Lamar volunteered to bring sandwiches for lunch at a homeless shelter. They bought 8 loaves of bread. Each
Brums [2.3K]

Answer:

64 slices

Step-by-step explanation:

The first step to solving this is to find out how many slices of bread there were in total. We know that each loaf of bread had 16 slices, and we know that there were 8 loaves. To get the amount of slices, we multiply the amount of slices in each loaf by the number of loaves there are.

16⋅8=128 slices of bread in total

Now that we know the total number of slices, we need to find how many sandwiches they made. If they used two slices per sandwich, we would divided the total number of bread slices by two.

128÷2=64.

7 0
3 years ago
Helppppppppppp please and expalin if you can
Klio2033 [76]

The angle subtended by a diameter is always right.  That's Thales' Theorem, one of the first in geometry.  We conclude y=90°.

The angle subtended by an arc is half the arc length, so z=50°.

The angles in a triangle add to 180°, so x = 180° - y - z = 40°.

Answer: x=40°, y=90°, z=50°

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