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3 years ago

Which expressions are equivalent to (4⋅a)⋅2 ?

Mathematics

1 answer:

shusha [124]3 years ago

8 0

Answer:

4⋅(a⋅2)

2⋅(4⋅a)

Step-by-step explanation:

(4⋅a)⋅2

4⋅(a⋅2) This is the same by the associative property of multiplication

2⋅(4⋅a) This is the same by the associative property of multiplication and the communicative property of multiplication

4⋅2⋅a⋅2 This brings in an extra 2 so it is not the same.

8a 4*2 = 8 so this is the same

4⋅2+a⋅2 This is the not the same 8+2a is not the same as 8a

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Simplify the imaginary number sqr -12

Anastaziya [24]

Answer:

$\sqrt{-12} = i\sqrt{12} = i\sqrt{4\cdot 3} = 2i\sqrt{3}$

Step-by-step explanation:

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3 years ago

One tank is filling at the rate of 3/4 gallon / 2/3 minute a second tank is filling at the rate of 3/8 gallon per 1/2 minute whi

eduard

$\bf \cfrac{\quad \stackrel{gallons}{\frac{3}{4}}\quad }{\stackrel{minutes}{\frac{2}{3}}}\implies \cfrac{3}{4}\cdot \cfrac{3}{2}\implies \cfrac{9}{8}~g/m
\\\\\\
\cfrac{\quad \stackrel{gallons}{\frac{3}{8}}\quad }{\stackrel{minutes}{\frac{1}{2}}}\implies \cfrac{3}{8}\cdot \cfrac{2}{1}\implies \cfrac{3}{4}~g/m\\\\
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$\bf \cfrac{3}{4}\cdot \cfrac{2}{2}\implies \cfrac{6}{8}\quad \textit{clearly then }\cfrac{9}{8}\textit{ is larger than }\cfrac{6}{8}
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\stackrel{\stackrel{tank's~volume}{gallons}}{y}=\cfrac{9}{8}\stackrel{minutes}{x}$

7 0

3 years ago

What is the range? 6 7 8 7 10

jeka94

Range= 4

Range is the highest number minus the lowest number, 10-6=4

4 0

2 years ago

Read 2 more answers

F(x)= -2(x-5)^2+8

geniusboy [140]

I don’t know all of it but....
Axis of symmetry is x=5
Vertex changed to (5,8)
Parabola opens down

4 0

3 years ago

Someone plz help with this!

Murljashka [212]

Answer:

15x-2+7x+4=90°[being complementary angle]

22x+2=90°

22x=90°-2

22x=88

x=88/22

x=4

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2 years ago