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My name is Ann [436]
2 years ago
5

If u = 2i - j; v= -5i + 4j and w = j find 4u (v -w).

Mathematics
1 answer:
Sedaia [141]2 years ago
5 0

Answer:

-40

Explanation:

Given

u = 2i - j; v= -5i + 4j and w = j

Required

4u(v-w)

4u = 4(2i) = 8i

v - w = -5i + 4j - j

v - w = -5i + 3j

Substitute

4u(v-w)

= 8i(-5i+3j)

= -40(i*i) [since i*i = 1]

= -40

Hence the required solution is -40

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Solve for x <br>x/3 = 5/8​
dlinn [17]

Answer:

x = 15/8

Step-by-step explanation:

x/3 = 5/8

Using cross products

8x = 3*5

8x = 15

Divide each side by 8

8x/8 = 15/8

x = 15/8

3 0
3 years ago
Read 2 more answers
LM=9, NR=16, SR=8. Find the perimeter of △SMP.
Amanda [17]

Answer:

<h2>perimeter of △SMP = 25</h2>

Step-by-step explanation:

The perimeter of the triangle △SMP is the sum of al the sides of the triangle.

Perimeter of △SMP = ||MS|| + ||MP|| + ||SP||

Note that the triangle △LRN, △LSM, △MPN and △SRP are all scalene triangles showing that their sides are different.

Given LM=9, NR=16 and SR=8

NR = NP+PR

Since NP = PR

NR = NP+NP

NR =2NP

NP = NR/2 = 16/2

NP = 8

From △LSM,  NP = PR = <u>MS</u><u> = 8</u>

Also since LM = MN, MN = 9

From △SRP, SR = RP = <u>PS =  9</u>

Also SR =<u> MP = 8</u>

From the equation above, perimeter of △SMP = ||MS|| + ||MP|| + ||SP||

perimeter of △SMP = 8+8+9

perimeter of △SMP = 25

5 0
4 years ago
Can you guys tell me the answers I need help .
zimovet [89]
Good luck i cant read it tho if i could read it i would help sorry
7 0
3 years ago
Can someone please help?
Alecsey [184]

Answer:

73 degrees

Step-by-step explanation:

6 0
3 years ago
rectangular cake pans X and Y are similar. The ratio of the width of the pan X to the width of pan Y is 3 : 4. The length of pan
Vikki [24]
We have two rectangles such as:
Rectangle 1 = X
Rectangle 2 = Y
Where the ratio of the two is:
Ratio = X / Y = 3/4
If x length is 10, we can solve for y length such as:
10 /Y length =3/4
Y length = 40/3 = 13.33

If x width is 5, then we can solve for y width such as:
5/y width = 3/4
y width = 20/3 = 6.67

The Perimeter of Pan Y is shown below:
Y perimeter = 2(6.67) + 2(13.33)
Y perimeter = 40

The answer is 40 inches.
3 0
3 years ago
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