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2 years ago

BRAINLIEST

Mathematics

1 answer:

mel-nik [20]2 years ago

5 0

Answer:

B' (0,-4)

Step-by-step explanation:

When a point undergoes a reflection across the x-axis, it follows this transformation:

(x, y) --> (x, -y)

(0, 4) --> (0, -4)

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A three inch diameter pulley on an electric motor that runs at 1800

Bezzdna [24]

Answer:

a) 3 inch pulley: 11,309.7 radians/min

6) 6 inch pulley: 5654.7 radians/min

b) 900 RPM (revolutions per minute)

Step-by-step explanation:

Hi!

When a pulley wirh radius R rotantes an angle θ, the arc length travelled by a point on its rim is Rθ. Then the tangential speed V is related to angular speed ω as:

$V=R\omega$

When you connect two pulleys with a belt, if the belt doesn't slip, each point of the belt has the same speed as each point in the rim of both pulleys: Then, both pulleys have the same tangential speed:

$\omega_1 R_1 = \omega_2 R_2\\$

$\omega_2 = \omega_1 \frac{R_1}{R_2} =1800RPM* \frac{3}{6}= 900RPM$

We need to convert RPM to radias per minute. One revolution is 2π radians, then:

$\omega_1 = 1800*2\pi \frac{radians}{min} = 11,309.7\frac{radians}{min}$

$\omega_2 = 5654.7 \frac{radians}{min}$

The saw rotates with the same angular speed as the 6 inch pulley: 900RPM

3 0

3 years ago

Write 3,905,000 in expanded form.

Damm [24]

Answer:

3,000,000

+ 900,000

+ 0

+ 5,000

+ 0

7 0

3 years ago

The height, H,of a cylinder is 5 units less than 3 times the radius, R, which expression expresses the height of the cylinder in

Zina [86]

The answer is: [B]: " 3r − 5 " .
_______________________________________________________

H = 3r <span>− </span>5
_______________________________________________________

3 0

3 years ago

Your grandfather gave you $1.65 with

Lelu [443]

Answer:

$1.98

Step-by-step explanation:

1.65/5=0.33

1.65+0.33=1.98

check: 1.98/6 =0.33

0.33x5=1.65

5 0

3 years ago

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Brainliest ? For which inequality is (0,0) a solution?

xxMikexx [17]

Answer:

C. y-5>3x-7

Step-by-step explanation:

If you multiply y and x to 0 you get -5 > -7

3 0

3 years ago

Read 2 more answers