3 years ago

How do you solve a proportion? (Like not how To but What do i do Because the question Is how do you solve a proportion.)

Mathematics

1 answer:

maksim [4K]3 years ago

3 0

Answer:

By cross-multiplying?

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The curves r1(t) = 4t, t2, t3 and r2(t) = sin(t), sin(5t), 2t intersect at the origin. find their angle of intersection, θ, corr

san4es73 [151]

First get the tangent vectors by differentiating r1 and r2
$r_1 '(t) = (4,2t,3t^2) \\ \\ r_2'(t) = (cos (t), 5 cos(5t), 2)$
Evaluate at t=0
$r_1' = (4,0,0) \\ \\ r_2' = (1,5,2)$

Use identity for angle between 2 vectors:
$u*v = |u| |v| cos \theta$

Evaluate dot product and unit vectors:
$u*v = (4,0,0)*(1,5,2) = 4 \\ \\ |u| = \sqrt{4^2 +0^2+0^2} = 4 \\ \\ |v| = \sqrt{1^2 + 5^2+2^2} = \sqrt{30}$

Sub into identity and solve for theta:
$4 = 4 \sqrt{30} cos \theta \\ \\ cos\theta = \frac{1}{\sqrt{30}} \\ \\ \theta = 79.48$

Answer:
Angle of intersection is about 79 degrees.

5 0

4 years ago

Help the stupid kid plz. its liner slop formula

kicyunya [14]

It is 8/-6 bcuz you go up 8 and then left 6 but it will be negative 6 bcuz its left

3 0

3 years ago

Read 2 more answers

How do you get the answer to this problem?<br> (2^3)(2^-7)

postnew [5]

(2^3)=2*2*2=8
(2^-7)=1/2*1/2*1/2*1/2*1/2*1/2*1/2=1/128
8*1/128=1/16=.0625

7 0

3 years ago

Part : Find g(x) by identifying the function you are taking the square root of

aksik [14]

Answer:

g(x) = (3x-4)

Step-by-step explanation:

F(x) = sqrt( 3x-4)

We are taking the square root of (3x-4)

so g(x) = (3x-4)

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3 years ago

A baby girl weighed 18 lb 10 oz at 11 months and 20 lb 2 oz at 12 months. How much weight did the baby gain during this month?

SVEN [57.7K]

Answer:

Step-by-step explanation:

6 oz, 19lb

1 lb, 20lb

2 oz, 20lb 2oz

6oz+2oz+1lb= 1lb 8oz

4 0

3 years ago