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3 years ago

PLS HELP Read the first paragraph of the article, "Kelvin Doe-A Young Engineer."

Mathematics

2 answers:

guajiro [1.7K]3 years ago

8 0

Answer:

Kelvin Doe is from a small village in the Republic of Sierra Leone in West Africa. Your welcome :)

swat323 years ago

7 0

Answer:

the right answer is A

Step-by-step explanation:

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What is the answer of 24:93=5:?

Tju [1.3M]

Answer:

24 : 93=5 : 19.375

Step-by-step explanation:

24:93=5:?

24/93=5/x

x = 5 x 93/24 = 19.375

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3 years ago

True or False. The circumference of a circle is proportional to its diameter. Explain your answer.

liberstina [14]

Yes because the circumference is also proportional to the radius of the circle, and the constant of proportionality is because the diameter is twice as long as the radius.

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2 years ago

Find a.b. a=3i+2j-k, b=4i+5k

Tomtit [17]

Answer: $a\cdot b= 7$

Step-by-step explanation:

We are given

$a=3\hat{i}+2\hat{j}-\hat{k}$

$b=4\hat{i}+5\hat{k}$

They can be written as

$a=3\hat{i}+2\hat{j}+(-1)\hat{k}$

$b=4\hat{i}+0.\hat{j}+5\hat{k}$

Now , the dot product of and b is given by :-

$\Rightarrow\ a\cdot b= (3\hat{i}+2\hat{j}+(-1)\hat{k})\cdot(4\hat{i}+0.\hat{j}+5\hat{k})$

$\Rightarrow\ a\cdot b=3\cdot 4 \cdot\hat{i}\cdot\hat{i}+2\cdot0\cdot\hat{j} \cdot\hat{j}+ (-1)\cdot 5 \cdot \hat{k}\cdot \hat{k}$

$\Rightarrow\ a\cdot b=12 \cdot\hat{i}^2+0-5 \cdot \hat{k}^2$

$\Rightarrow\ a\cdot b=12 \cdot(1)+0-5 \cdot (1)$ [Since $\hat{i}^2=\hat{k}^2=1$ ]

$\Rightarrow\ a\cdot b=12 -5=7$

Therefore , the value of the dot product $a\cdot b= 7$

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3 years ago

How do u solve x+8-x=2

Lelu [443]

1) soln,

or,x+8-x=2

or,x-x=2-8

•°•-6 Ans#

4 0

2 years ago

What is the first consecutive odd interger that follows -7

Andre45 [30]

Answer:

-5 is your answer

Step-by-step explanation:

The next consecutive ODD number, a number that is contains 1, 3, 5, 7, or 9 in the ones place value. is +2 of the original number given.

-7 + 2 = -5

-5 is your answer.

3 0

3 years ago

Read 2 more answers