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4 years ago

Do parallel rays have to be coplanar?

Mathematics

1 answer:

Vikki [24]4 years ago

5 0

No I belive they don’t have to be

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Integral of of sin x/cosˆ2 x

marin [14]

Answer:

$\sec x + c$

Step-by-step explanation:

$\int \frac{ \sin \: x}{ { \cos}^{2}x } \: dx \\ \\ = \int \frac{ \sin \: x}{ { \cos}x } . \frac{ 1}{ { \cos}x } \: dx \\ \\ = \int \tan x . \sec x \: dx \\ \\ = \sec x + c$

7 0

3 years ago

3, 9,15,... 41th term

Dmitrij [34]

Answer:

222

Step-by-step explanation:

4 0

2 years ago

3/8 converted to a decimal

Aloiza [94]

Divide 3 by 8 (3/8)
Solution : 0.375

5 0

3 years ago

Use the graph to identify the amplitude for each

Flauer [41]

Answer:

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Show working out please

Vlad [161]

If 40% are boys, 60% are grills.

As fractions:

4/10 = 2/5 are boys

6/10 = 3/5 are grills

70% or 7/10 of the boys arrive by car:

(2/5)(7/10) = 14/50 = 7/25

And 60% or 3/5 of the grills arrive by car:

(3/5)(3/5) = 9/25

So in total we have 7/25 + 9/25 = 16/25 = 64/100 = 64%

64% chance that a child arrives by car.

4 0

3 years ago