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monitta
4 years ago
15

Simplify each expression. Write answers with only positive exponents. Assume that all variables represent positive real numbers.

Mathematics
1 answer:
zubka84 [21]4 years ago
6 0

Answer:

Step-by-step explanation:

Remember that r = r^1.

r^-1/2(r + r^3/2)

Distribute the r^-1/2 to both terms:

r^-1/2 * r^1 + r^-1/2 * r^3/2

When we multiply the same bases together, we add the exponents!

r^1/2 + r^1

Simplify:

r^1/2 + r

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The base of a rectangle prism is 20 cm. If the height of the prism is 5 cm what is it volume
goldenfox [79]

Answer:

Answer : 100^3

Step-by-step explanation:

formula to find volume of prism =

v = base area * height

v = 20 * 5

v = 100

so , volume is 100^3

7 0
3 years ago
I need help please and thank you
mrs_skeptik [129]
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A metal worker has several 1-kilogram bars of a metal alloy that contain 23% copper and several 1-kilogram bars that contain 79%
astraxan [27]

Answer:

30 each of 23% bars and 18 each of 79% bars

Step-by-step explanation:

If x is the number of 1 kg 23% copper bars, and y is the number of 1 kg 79% copper bars, then:

x + y = 48

0.23x + 0.79y = 0.44(48)

Substituting and solving:

0.23x + 0.79(48-x) = 0.44(48)

0.23x + 37.92 - 0.79x = 21.12

16.8 = 0.56x

x = 30

y = 48 - x

y = 18

You need 30 each of 23% bars and 18 each of 79% bars.

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4 years ago
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dem82 [27]

Answer:

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