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olchik [2.2K]
1 year ago
12

Find a ⋅ b. a = 8i + 6j, b = 4i + 5j

Mathematics
2 answers:
frutty [35]1 year ago
7 0
You could rewrite this as double brackets, as you are multiplying together two sets of two terms. It would then look like:
(8i + 6j)(4i + 5j)
and you can expand by multiplying together all of the terms

8i × 4i = 32i²
8i × 5j = 40ij
6j × 4i = 24ij
6j × 5j = 30j²

To get your final answer, you then just need to add together all of the like terms, and get 32i² + 30j² + 64ij

I hope this helps!
dybincka [34]1 year ago
6 0
32i+30j should be correct(hopfully)

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Alex_Xolod [135]
To do this we will divide d amount of dollars by d amount of lbs.

Lets do it:-
 
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1 lb of trail mix is for $4.82
 
CHECK OUR WORK:-
 
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We were RIGHT!!
 
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1 year ago
Object A travels in the +x-direction before hitting a stationary object B. Afterwards, object AÍs x-momentum is 5.7 _ 104 kilogr
ANEK [815]
Below are the choices that can be found from other sources:

A. 42 
<span>B. 45 </span>
<span>C. 47 </span>
<span>D. 48 </span>
<span>E. 49
</span>
The answer is C or 47. The object’s resultant angle of motion with the +x-axis after the collision is  47. The reason for that is f<span>rom object A’s x-momentum is 5.7 × 104 kilogram meters/second and its y-momentum is 6.2 × 104 kilogram meters/second, we know that tan of the angle from the x-axis is 6.2 / 5.7 = 1.09 and acrtan 1.09 = 47.4</span>
8 0
2 years ago
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A math exercise states that the circumference of a certain circle is 23.55 inches with diameter d and pi rounded to 3.14. Larry
irinina [24]

Answer:

None of them are correct.

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Step-by-step explanation:

Given;

Circumference of the Circle = 23.55

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Formula:

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Substituting the values

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Now diameter is twice the radius

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