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3 years ago

Fine the missing side, round to the nearest tenth A.26.5 B.17.9 C.21.6 D.23

Mathematics

1 answer:

Andru [333]3 years ago

3 0

I’m pretty sure the answer is C

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Find the directional derivative of f at the given point in the direction indicated by the angle θ.

anygoal [31]

Answer:

Directional derivative = 1/√2

Step-by-step explanation:

We are given f(x, y) = y cos(xy)

Now, we know that;

∇f(x, y) = ycos xy

Thus, applying that to the question, we have;

∇f(x, y) = [-y² sin xy, cos (xy) - xy sin xy]

At coordinates (0,1),we now have;

∇f(0, 1) = [-1²•sin0, (cos 0) - 0]

∇f(0, 1) = [0, 1]

Now, unit vector indicated by the angle θ is given as; u = [cos θ, sin θ]

From the question, since θ = π/4, thus

u = [cos π/4, sin π/4]

Cos π/4 in surd form is; 1/√2

Also, sin π/4 in surd form is; 1/√2

So, u = [1/√2, 1/√2]

Directional derivative = [∇f(0, 1)] • u

= [0, 1] × [1/√2, 1/√2] = 0 + 1/√2 = 1/√2

4 0

2 years ago

There are 32 children in class 6B. On Thursday, four of the children were absent. What percentage of the children were absent on

Alex777 [14]

Answer:

Step-by-step explanation:

32÷4=8

i hope this helps ^^

6 0

2 years ago

Read 2 more answers

Help find y .. slope is m=-5/8

goblinko [34]

y = 8

using the ' gradient formula' m = (y₂ - y₁)/(x₂ - x₁)

with (x₁, y₁) = (3, 3), (x₂, y₂) = (- 5, y) and m = - $\frac{5}{8}$

(y - 3)/( - 5 - 3) = - $\frac{5}{8}$

(y - 3)/(-8) = - $\frac{5}{8}$

multiply both sides by - 8 to eliminate fractions

y - 3 = 5

add 3 to both sides

y = 5 + 3 =8

5 0

3 years ago

23=4w_13 simply your as much as possible

Nataly_w [17]

23=4w-13
First add 13 to both sides.
36=4w
w=9
Hope this helps!

5 0

3 years ago

Read 2 more answers

You increase the size of a computer screen display by 20 %

Eva8 [605]

Assuming display of computer is at 100%
So increase by 20% = 120 (20/100 *100)
then 20% of 120 is: 20/100 * 120 = 24

So the display is now 120-24 = 96

Hope this helps!

4 0

3 years ago

Read 2 more answers