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3 years ago

Help Plz !!!

Mathematics

1 answer:

coldgirl [10]3 years ago

7 0

The answer is A i think

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It S.P. =Rs810, loss percent=10% find C.p

zlopas [31]

Answer:

x=900

Step-by-step explanation:

100-10=90

90/100=0.9

x*0.9=810

x=810/0.9

<em>x=900:)</em>

hope it helps!!

Have a great day

5 0

3 years ago

Determine the projection of w onto u

natali 33 [55]

Answer:

c. 6.2i - 4.2j

Step-by-step explanation:

The vector projection when the angle θ not known can be calculated using the following property of the dot product:

$proj_uv=\frac{u\cdot v}{||u||^2} u$

Where the dot product of two vectors is given by:

$u\cdot v= $$\sum_{i=1}^{n} u_iv_i= u_1v_1+u_2v_2+...+u_nv_n$$$

And the magnitude of a vector is given by:

$||u||=\sqrt{u_1^2+u_2^2+...+u_n^2}$

Using the previous definition, let's calculate the projection of w onto u:

First let's calculate the dot product between w and u:

$u\cdot w =(9*19)+(-6*15)=171-90=81$

Now let's find the magnitude of u:

$||u||=\sqrt{9^2+(-6)^2} = 3 \sqrt{13}$

So:

$||u||^2=117$

Therefore:

$proj_uw=\frac{u\cdot w}{||u||^2} u=\frac{81}{117} \langle9,-6\rangle=\langle6.23,-4.14\rangle\approx6.2i-4.2j$

5 0

3 years ago

Read 2 more answers

What is -12/11 = -3/?

solniwko [45]

Answer:

According to my calculations, the missing number is 11/4

Step-by-step explanation:

7 0

3 years ago

Please help with 1-3

NNADVOKAT [17]

Number 1. is 1/5 but in decimal form it’s 0.2

5 0

3 years ago

Read 2 more answers

2 divided by -12 what is the answer?

Strike441 [17]

Answer:

-1/6

Step-by-step explanation:

When dividing 2 by -12 you would use 2 as the numerator and -12 as the denominator and then simplify it by dividing both by two to end up with -1/6

8 0

3 years ago