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3 years ago

Delilah does 184 jumping jacks in 4 minutes. She does her jumping jacks at a constant rate.

Mathematics

2 answers:

ikadub [295]3 years ago

6 0

Answer:

she did 46 jumping jacks per minute

Step-by-step explanation:

Ivahew [28]3 years ago

3 0

Answer:

46 jumping jacks per minute

Step-by-step explanation:

184/4= 46

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3 years ago

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Given two vectors A=2i+3j+4k,B=i-2j+3k find the magnitude and direction of sum<br>(physics question)

Law Incorporation [45]

Answer:

$Magnitude =\sqrt{59} \\\\Direction \: of \: \overrightarrow{A + B} = \frac{3}{\sqrt {59}} , \:\frac{1}{\sqrt {59}} , \:\frac{7}{\sqrt {59}}$

Step-by-step explanation:

A=2i+3j+4k

B=i-2j+3k

Sum of the vectors:

A + B = 2i+3j+4k + i-2j+3k = 3i + j + 7k

$Magnitude =\sqrt{3^2 + 1^2+ 7^2} \\\\Magnitude =\sqrt{9+1+49} \\\\Magnitude =\sqrt{59}$

Direction of the sum of the vectors:

$\widehat{A + B} =\frac{\overrightarrow{A + B}}{Magnitude\: of \:\overrightarrow{A + B}} \\\\\widehat{A + B} =\frac{3i + j + 7k}{\sqrt {59}} \\\\\widehat{A + B} =\frac{3}{\sqrt {59}} i +\frac{1}{\sqrt {59}} j+\frac{7}{\sqrt {59}} k\\\\Direction \: of \: \overrightarrow{A + B} = \frac{3}{\sqrt {59}} , \:\frac{1}{\sqrt {59}} , \:\frac{7}{\sqrt {59}} \\\\$

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2 years ago

What does -1/2 * 1/2 = to

sertanlavr [38]

The answer is -1/4.

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3 years ago

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Step-by-step explanation:

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3 years ago

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lbvjy [14]

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Step-by-step explanation:

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