3 years ago

Use mental math to find the equations that are true. Select all that apply.

Mathematics

2 answers:

Alex777 [14]3 years ago

7 0

Answer:

A, C, D, E

Step-by-step explanation:

Mariulka [41]3 years ago

7 0

Answer:c,D, and E

Step-by-step explanation:I took the test

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an acute angle measures (6x-45)°. write an inequality to describe the range of all possible values of x.

Grace [21]

6x-45<90
6x<90+45
6x<135
x<135/6
x<22.5

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3 years ago

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Initially a wheel rotating about a fixed axis at a constant angular deceleration of 0.5 rad/s 2 has an angular velocity of 0 rad

Zigmanuir [339]

Answer:

$\theta = 5.83\ rad$

Step-by-step explanation:

given,

angular deceleration, α = -0.5 rad/s²

final angular velocity,ω_f = 0 rad/s

angular position, θ = 6.1 rad

angular position at 3.9 s = ?

now, Calculating the initial angular speed

$\omega_f^2 = \omega_i^2 + 2 \alpha \theta$

$0 = \omega_i^2 - 2\times 0.5\times 6.1$

$\omega_i = \sqrt{6.1}$

$\omega_i = 2.47\ rad/s$

now, angular position calculation at t=3.9 s

$\theta = \omega_i t + \dfrac{1}{2}\alpha t^2$

$\theta =2.47\times 3.9 - \dfrac{1}{2}\times 0.5\times 3.9^2$

$\theta = 5.83\ rad$

Hence, the angular position of the wheel after 3.9 s is equal to 5.83 rad.

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4 years ago

What is the factored form of the polynomial z² − 10z + 25?

qwelly [4]

Answer:

( z - 5 ) ( z - 5 )

Step-by-step explanation:

z² − 10z + 25

= z² − 5z - 5z + 25

= z ( z - 5 ) - 5 ( z - 5 )

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3 years ago

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yuradex [85]

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Step-by-step explanation:

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yuradex [85]

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Step-by-step explanation:

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