3 years ago

10. How many centimeters is 5 feet? (1 foot= 30 cm)

2 answers:

3 0

It will be 150 because if each foot is 30 cm you will count by 3s 5 times and you get 15 and just add the zero and you get 150

Kazeer [188]3 years ago

3 0

The answer is 150 Bc you would do 5 ft times 30.48 cm

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3(x + y) = 12

Mila [183]

Answer:

$\large\boxed{B)\ -2}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}3(x+y)=12&(1)\\\\\dfrac{x}{2}=3&(2)\end{array}\right\\\\(2)\ \dfrac{x}{2}=3\qquad\text{multiply both sides by 2}\\\\2\!\!\!\!\diagup^1\cdot\dfrac{x}{2\!\!\!\!\diagup_1}=(2)(3)\\\\x=6\\\\\text{Put it to (1):}\\\\3(6+y)=12\qquad\text{divide both sides by 3}\\\\\dfrac{3\!\!\!\!\diagup^1(6+y)}{3\!\!\!\!\diagup_1}=\dfrac{12}{3}\\\\6+y=4\qquad\text{subtract 6 from both sides}\\\\6-6+y=4-6\\\\y=-2$