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3 years ago

Find the perimeter of 8cm, 5cm, 7cm, 10cm

Mathematics

1 answer:

Tasya [4]3 years ago

6 0

30 cm is the answer

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Which of the following statements is false regarding randomization?

Tanzania [10]

Answer:

Step-by-step explanation:

the other person is wrong

4 0

3 years ago

It was recently estimated that homes without children outnumber homes with children by seven to five. If there are 3564 homes in

Gwar [14]

Answer:

2079

Step-by-step explanation:

Homes without children outnumbers homes with children by about 7 to 5 ;

If number of children = 3564

Number of homes without children :

Expressing the relaship interms of ratio :

Without children : with children = 7 :5

Total ratio = 7 + 5 = 12

Number of homes without children:

(7 / 12) * 3564

0.5833333 * 3564

= 2079

8 0

3 years ago

A device is rated at 1,100 watts.what current is required if it is operated at 110 volts?

WINSTONCH [101]

1 ) Watts =E * I = 110 * 5 = 550 watts =.55 KW

2) I = Watts / e = 1100 / 110 = 10 amperes

3) 1 horsepower = 33000 ft/lbs per minute

HP = ( 2000 * 1000) / (33000 *4) = 15.1515 hp

4) cost = (10 * 100 / 1000) *11 * $0.10 = $1.10

5) This answer will be incorrect because you have not stated the power factor of the motor.

va = I * E = 7.5 * 240 = 1800

2 hp = 2 * 746 watts = 1492 watts

If the motor had a 1.0 power factor (it doesn't) the efficiency would be

efficiency = output / input = 1492 / 1800 = 82.888 %

6) I = watts / E =1000 / 120 = 8.333 amps

7) 1 = watts / E = 1000 / 240 = 4.1616

8) Kw-hr = (2 * 24 * 365 ) / 1000 = 17.52

cost = kw-hr * $0.03 = 17.52 * $0.03 = $0.5256

9) efficiency = (115 * 240) / (2400 * 12) = 95.8333 %

10) KW = (I^2 * R) / 1000 = (20^2 * 5) / 1000 = 2

5 0

3 years ago

Graph the function

Assoli18 [71]

Answer:

see below for a graph

Step-by-step explanation:

The equation is in slope-intercept form, so right away you know one point is the y-intercept: (0, -4).

Another point can be found using the slope, which is 3/2, to go 2 units to the right and 3 units up. (Slope = rise/run, so rise = 3 and run = 2 match the slope.)

6 0

3 years ago

Layla has 3/4 of a can of paint. She uses 2/3 of the paint for one wall in her bedroom. How much of the can did she use? PEASE A

maksim [4K]

Answer:

8/12 of the can

Step-by-step explanation:

Make the denominator of both 12. Then 2/3 is 8/12.

4 0

3 years ago