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3 years ago

Before lava reaches the surface, the molten material is called

Mathematics

2 answers:

tiny-mole [99]3 years ago

8 0

The answer is B. magma because magma is what is underneath the surface and when it reaches the surface it's called lava

Olenka [21]3 years ago

6 0

The answer is B. Magma

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Find the exact values of a) sec of theta b)tan of theta if cos of theta= -4/5 and sin<0

Gre4nikov [31]

Answer:

Using trigonometric ratio:

$\sec \theta = \frac{1}{\cos \theta}$

$\tan \theta = \frac{\sin \theta}{\cos \theta}$

From the given statement:

$\cos \theta = -\frac{4}{5}$ and sin < 0

⇒ $\theta$ lies in the 3rd quadrant.

then;

$\sec \theta = \frac{1}{-\frac{4}{5}} = -\frac{5}{4}$

Using trigonometry identities:

$\sin \theta = \pm \sqrt{1-\cos^2 \theta}$

Substitute the given values we have;

$\sin \theta = \pm\sqrt{1-(\frac{-4}{5})^2 } =\pm\sqrt{1-\frac{16}{25}} =\pm\sqrt{\frac{25-16}{25}} =\pm \sqrt{\frac{9}{25} } = \pm\frac{3}{5}$

Since, sin < 0

⇒ $\sin \theta = -\frac{3}{5}$

now, find $\tan \theta$ :

$\tan \theta = \frac{\sin \theta}{\cos \theta}$

Substitute the given values we have;

$\tan \theta = \frac{-\frac{3}{5} }{-\frac{4}{5} } = \frac{3}{5}\times \frac{5}{4} = \frac{3}{4}$

Therefore, the exact value of:

(a)

$\sec \theta =-\frac{5}{4}$

(b)

$\tan \theta= \frac{3}{4}$

7 0

4 years ago

PLEASE HELP SOON, WILL GIVE BRAINLYIST!!! Just look at image!

vekshin1

Answer: 46 degrees

Explanation:

Angle PRS = 98 degrees

The two smaller pieces add up to this larger angle, so,

(anglePRQ) + (angleQRS) = angle PRS

(3x-8) + (2x+6) = 98

5x-2 = 98

5x = 98+2

5x = 100

x = 100/5

x = 20

Then we can find each angle

angle PRQ = 3x-8 = 3*20-8 = 52 degrees
angle QRS = 2x+6 = 2*20+6 = 46 degrees

Notice how 52+46 = 98 to confirm the answers.

4 0

2 years ago

Read 2 more answers

While on vacation, your family budgeted $550 for food. Your family went to the grocery store for drinks and snacks and spent $67

noname [10]

550 for food...u spent 67.19 for drinks and snacks....u spent 55 for each meal (x)

so ur equation would be : 550 - (67.19 + 55x)

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3 years ago

Please help

VashaNatasha [74]

Answer:

Step-by-step explanation:

Vol of a cylinder = pi * r^2 h

Vol of cone = 1/3 pi r^2 h

cylinder = pi * (1)^2 * (3) = 3 pi

cone = 1/3 pi (1^2) 4 = 4/3 pi

total = 3 pi + 4/3 pi

= pi(3+ 4/3) = pi(4.333)

= 13.6 f^3

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3 years ago

Who wannaa zo om wit me ? let talk

hram777 [196]

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