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Vinil7 [7]
3 years ago
10

Kalyin keyboards at a rate of 60 words per minute for 5 minutes and 45 words per minute for 10 minutes. How many words did she t

ype in all?
Mathematics
1 answer:
Vadim26 [7]3 years ago
8 0
750 words. 60 x 5 + 45 x 10
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Find the modulus and the unit vector along the sum of the vectors. - r₁ +r₂ +r3 given that r₁ = 2i+j+4k - r₂ = 3i-2j+7k, r3 = 5i
bazaltina [42]

j+8k

first -2i+j+4k-3i-2j+7k+5i+2j-3k

8 0
2 years ago
Evaluate A2 for A = -4
vekshin1
Hello there!

Evaluate a²  for a = -4

The first step we need to do is replace a by -4

So we have (-4)²

Now what you have realize is that we need to multiply -4 by itself twice.

So it should looks like this:

-4 * -4

The rules says that when we have minus * minus, the answer is positive.

So we have -4 * -4 = 16

Answer: 16

I hope this helps!

Please let us know if you have other questions.

#Garebear
8 0
3 years ago
A cube has volume 216cm find total surface area of cube​
Katena32 [7]

Answer:

Answer: 216 cm2 (square centimetres cm^{2}, in your question you had to put cm3, cubic centimetres, it's IMPORTANT )

Step-by-step explanation:

A perfect cube by definition has 3 equal dimensions, as an immediate rule: volume and total surface are equal, only the unit of measure changes (cubic for the volume, square for surface).

But let's calculate it anyway:

Volume  = Edge * Edge * Edge = length * width * depth = Edge^{3}  (remember: all edges are equal in this case)

so Edge = \sqrt[3]{Volume}

in your example Edge = \sqrt[3]{216} = 6cm

So the surface of one side is 6*6 = 36cm^{2}

There are 6 sides in total, so the total surface is 6*36 = 216 cm^{2}

Note: I call them "edges" but in case of a cube most say just "length"

3 0
3 years ago
As a member of a music club, you can order CDs for $14.99 each. The music club also charges $4.99 for each shipment. The express
Dafna1 [17]
Howdy!

using the expression 14.99(n) + 4.99, the total of 3 CDs would cost $49.96.
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3 years ago
Read 2 more answers
Write the expression: the quotient of the quantity k minus 12 and m.
Vlad1618 [11]

the quotient= answer

quantity = ( )

minus= subtraction

final answer:

(k-12) ÷ m

6 0
3 years ago
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