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3 years ago

What is double of 3?

Mathematics

2 answers:

____ [38]3 years ago

8 0

It will be 6 because you just add it twice the amount to 3. Therefore, 3 *2=6

Liula [17]3 years ago

5 0

the answer is six all your doing is 3*3 so 6

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What is the sum of the angles of a triangle

Sergeu [11.5K]

Answer:

Triangle has 180 degrees

Squares have 360 degrees

5 0

3 years ago

Find the angle between vector u=2i+sqrt(11)j and v=-3i-2j to the nearest degree

const2013 [10]

Answer: Last option 155°

Step-by-step explanation:

We have the components of the vectors u and v.

Then, to find the angle between them, perform the following steps:

1) Calculate the scalar product u * v

If $u = 2i + \sqrt{11}j$ and $v = -3i-2j$

Then, the product scalar u * v is:

$u * v = (2)(-3) + (\sqrt{11})(-2)$

$u * v = -6-2\sqrt{11}$

$u * v = -12.633$

2) Calculation of the magnitude of both vectors.

$| u | = \sqrt{(2) ^ 2 + (\sqrt{11})^2}\\\\| u | = \sqrt{4+11}\\\\| u | = \sqrt{15}$

$| v | = \sqrt{(- 3) ^ 2 + (- 2) ^ 2}\\\\| v | = \sqrt{9 +4}\\\\| v | = \sqrt{13}$

3) Now that you know the product point between the two vectors and the magnitude of each, then use the following formula to find an angle

$u * v = | u || v |cos(\alpha)$

$-12.633 = \sqrt{15}\sqrt{13}*cos(\alpha)\\\\cos(\alpha) = \frac{-12.633}{\sqrt{15}\sqrt{13}}\\\\arcos(\frac{-12.633}{\sqrt{15}\sqrt{13}}) = \alpha\\\\\alpha =155\°$

7 0

4 years ago

Hassan buys organic nuts priced at $55 from the grocery store. How much did she pay the cashier, if she received $25 in change?

Reil [10]

Answer:

$80

Step-by-step explanation:

x-55 =25

x=80

6 0

3 years ago

What are the missing numbers in the sequence below?

stealth61 [152]

Answer:

8.4 , 7.7

Step-by-step explanation:

- 0.7

7 0

3 years ago

What value of ‘a’ makes the equation true? Show your work

gogolik [260]

Answer: 30/45=6/9
30 6
___=___
45 a

cross multiply
30a=270
divide both sides by 30
a=9

5.Answer=A

2 1/5=2 2/10

2 2/10+1 1/10=3 3/10

______________

Answer=-1

3/-5+(-4/10)=
3/-5-0.4
-0.6-0.4=-1

3 0

3 years ago

Read 2 more answers