What is 15/4 plus 11/10. HELP ME PLEASE

Mathematics

2 answers:

denis23 [38]3 years ago

6 0

15/4 plus 11/10

first find the common denominator so the common denominator is 20 so you have turn 10 and 4 to 20.

If you want to turn 4 to 20 you multiply it by 5 you multiply 5 to 4 and 15 that will be 75/20.

if want to turn 10 to 20 you multiply it by 2 . u multiply 2 to 10 and 11 that will be 22/20

then you do 75/20 plus 22/20 you add 75 plus 20 equal 97/20 you don't change the denominator. the decimal will be 4.85.

mafiozo [28]3 years ago

3 0

The answer is 99/20 or 4.95 or 4 19/20

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The wheels on Darlene's car have on 11-inch radius. If the wheels are rotating at a rate of 378 rpm, find the linear speed in mi

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The linear speed in which Darlene is traveling is 24.74 miles per hour.

Step-by-step explanation:

The wheel experiments rolling, which is a combination of translation and rotation. The point where linear speed happens is located at geometrical center of the wheel and instantaneous center of rotation is located at the point of contact between wheel and ground. The linear speed ( $v$ ), measured in inches per second, is defined by following expression:

$v = R\cdot \omega$ (1)

Where:

$R$ - Radius of the wheel, measured in inches.

$\omega$ - Angular speed, measured in radians per second.

If we know that $R = 11\,in$ and $\omega \approx 39.584\,\frac{rad}{s}$ , then the linear speed, measured in miles per hour, in which Darlene is traveling is: