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Mrrafil [7]
2 years ago
14

Find a. b. if a =10i+4j and b = 3i+4j

Mathematics
2 answers:
andre [41]2 years ago
8 0

Answer:

10i+4j times 3i+4j=

30i+16j

(30,16)

Step-by-step explanation:


sergey [27]2 years ago
3 0

Answer:

Option (c) is correct.

The dot product of given vectors a=10\hat{i}+4\hat{j} and b=3\hat{i}+4\hat{j} is 46.

Step-by-step explanation:

Given : The vectors  a=10\hat{i}+4\hat{j} and b=3\hat{i}+4\hat{j}

We have to find the dot product of given vectors a and b

Consider the given vectors a=10\hat{i}+4\hat{j} and b=3\hat{i}+4\hat{j}

\mathrm{Computing\:dot\:product\:of\:two\:vectors}:\quad \left(x_1,\:\:\ldots ,\:\:x_n\right)\cdot \left(y,\:\:\ldots ,\:\:y_n\right)=\sum _{i=1}^nx_iy_i

We have

\begin{pmatrix}10&4\end{pmatrix}\begin{pmatrix}3&4\end{pmatrix}

=30+16=46

Thus, The dot product of given vectors a=10\hat{i}+4\hat{j} and b=3\hat{i}+4\hat{j} is 46.

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Maru [420]

Answer:

B. d = 5/3t

Step-by-step explanation:

The complete question is shown in the figure attached with.

We need to find the equation of direct variation using the graph. The general equation for a direction variation is:

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In this case, the variable along x axis is time in seconds i.e. "t" and the variable along y axis is distance in meters i.e. "d". So, the equation for this case would be:

d = kt

We need to find the value of "k" to complete this equation. For this we can use any point from the graph and substitute it in the above equation. From the graph we can see that the distance covered for time = 3 seconds is 5 meters. Substituting t =3 and d = 5 in above equation, we get:

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d=\frac{5}{3}t

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7 0
3 years ago
If question 7, how do you solve for the angles
ladessa [460]
ABC is same as FDE
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8 0
3 years ago
Steel loading ramps are used to load a
tia_tia [17]

Answer:

6.25 feet.

Step-by-step explanation:

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We can see from our attachment that ramp and truck bed forms a right triangle with ground. The truck bed is opposite side and length of ramp is hypotenuse of our given angle.

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6 0
3 years ago
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zaharov [31]

Answer:

6.67% is as close as you can get

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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Ratling [72]
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8 0
3 years ago
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