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2 years ago

Solve for x in the triangle round your answer to the nearest tenth Pls help ASAP!!

Mathematics

1 answer:

lbvjy [14]2 years ago

4 0

Answer:

x = 3.9

Step-by-step explanation:

cos = adj/hyp

cos67 = x/ 10

x = 10 * cos67

use calculator

x = 3.9

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Which are perfect squares? Check all that apply.

zmey [24]

Answer:16,625,169,9

Step-by-step explanation:

Find the square root of the number and if it’s even and there’s no decimal than it’s a perfect square

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2 years ago

Solve (−7) ⋅ (−4). Please hurry :D -28 -11 28 11

sweet-ann [11.9K]

Answer:

Step-by-step explanation:

$- (7) \times ( - 4) \\ - ( - 28) \\ - \times - = + \\ = 28$

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2 years ago

Find the two integers whose sum is -4 and product is -45

Ipatiy [6.2K]

Answer:

(+5) and (-9)

Step-by-step explanation:

(+5) + (-9) = -4

(+5) × (-9) = -45

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3 years ago

A spinning giant star of initial radius R1 and angular speed ω1 suddenly collapses radially inward reaching a new radius R2 = 0.

tiny-mole [99]

Answer:

K1/K2=4

Step-by-step explanation:

The kinetic energy of a rotating sphere is given by:

$K=\frac{I*\omega^{2} }{2}$

The moment of inertia of a solid sphere is given by

$I=\frac{2MR^{2} }{5}$

The initial kinetic energy is therefore

$K_1=\frac{2MR^{2}*\omega^{2} }{10}$

$K_1=\frac{MR_1^{2}*\omega^{2} }{5}$

The final kinetic energy is given by

$K_2=\frac{MR_2^{2}*\omega^{2} }{5}$

Therefore the relation K1/K2 if R2 = 0.5R1

$\frac{K_1}{K_2} =\frac{5M(R_1)^{2}*\omega^{2} }{5*M(0.5R_1)^{2} \omega^{2}}$

The text says nothing about the final angular velocity just the collapse of the collapse of the radius

$\frac{K_1}{K_2} =\frac{1 }{(0.5)^{2} }=4$

3 0

2 years ago

<1 and <2 are supplementary angles. The measure of <1 is 87º. The measure of <2 is 15x + 18º.

Kay [80]

Answer: x= 5

Step-by-step explanation: If angles 1 and 2 are supplementary, that means they add up to 180. So if angle 1 is 87, angle 2 has to be 180-87=93. Then the equation would be 15x+18=93. Subtract 18 on both sides. 15x=75. Divide by 15 and your answer is 5.

6 0

2 years ago