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2 years ago

Help me please if your good at maths

Mathematics

2 answers:

barxatty [35]2 years ago

3 0

Answer:

a) n+5

6, 7, 8, 9, ..., 15

b) 2n-1

1, 3, 5, 7, ..., 19

Lana71 [14]2 years ago

3 0

Answer:

a) n+5

6, 7, 8, 9, ... , 15

b) 2n-1

1, 3, 5, 7, ... , 19

Just add in the # of terms as n and plug it into the formula given.

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You are standing 40 meters from the base of a tree that leans 8o away from you. The angle of elevation from you to the top of th

Y_Kistochka [10]

Answer:

the height of the tree is 15.49 m

Step-by-step explanation:

Step 1:

From the figure, we can determine ∠ATB by using the fact that the sum of all the angles in a triangle add up to 180°:

∠ ATB = 180° - 98° - 20°

∠ ATB = 62°

Step 2:

Therefore, using the law of sines, we can determine the height of the tree.

TB / sin(20°) = 40 / sin(62°)

TB = 40 × (sin(20°) / sin(62°))

TB = 15.49 m

Therefore, the height of the tree is 15.49 m

3 0

2 years ago

If sinX= 0.9, what is the value of cos X? Round the value to the nearest thousandth.

SSSSS [86.1K]

Answer: sqrt(19)/10

Step-by-step explanation:

sinx=0.9

x=arcsin(0.9)

Insert x for cos(x):

cos(arcsin(0.9)=

Use identify $cos(arcsin(x))=\sqrt{1-x^{2} }$ , so

$\sqrt{1-(\frac{9}{10})^{2}} =\sqrt{\frac{19}{100} } =\frac{\sqrt{19}}{10}$

Sorry if this is confusing.

6 0

2 years ago

Explain how the exteriorv relates to the i

OverLord2011 [107]

Step-by-step explanation:

in this situation

A+B =D

5 0

2 years ago

Find the smallest solution to the equation 2/3 x^2 =24

lesya692 [45]

Answer:

\frac{2x^2}{3} =24

Step-by-step explanation:

times both sides by 3

2x²=72

divide both sides by 2

x²=36

sqrt both sides

x=+/-6

x=-6 or 6

-6<6 so -6 is the smallest solution

7 0

2 years ago

Find the geometric mean of 14 and 20.

Tom [10]

Answer:

16.73 to nearest hundredth.

Step-by-step explanation:

The geometric mean of x and y is √xy.

So out geometric mean is √(14*20)

= √280

= 16.7332

7 0

2 years ago