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3 years ago

8

There are 70,000 bacteria present in a culture. An antibiotic is introduced to the culture and the number of bacteria is reduced

by half every 4 hours. Which of the following statements are true? Select all that apply

1 answer:

saveliy_v [14]3 years ago

5 0

options? then I can figure it out :)

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Solving equations and distributive property

Tomtit [17]

Answer:

x=20

Step-by-step explanation:

2(x+10)=60

distribute 2 by multiplying numbers in parenthesis

2x+20=60

subtract 20 from both sides

2x=40

divide both sides by 2

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x=20

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3 years ago

There is two questions

Mkey [24]

Answer:

1 is the 4th answer

2 is 1.875

Step-by-step explanation:

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2 years ago

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It's a question from real and complex numbers which I can't solve. so someone PLZ HeLp

Semmy [17]

Answer:

$\frac{1}{5}$

Step-by-step explanation:

Using the rules of exponents

$a^{m}$ × $a^{n}$ = $a^{(m+n)}$ , $\frac{a^{m} }{a^{n} }$ = $a^{(m-n)}$ , $(a^m)^{n}$ = $a^{mn}$

Simplifying the product of the first 2 terms

$\frac{a^{p^2+pq} }{a^{pq+q^2} }$ × $\frac{a^{q^2+qr} }{a^{qr+r^2} }$

= $a^{p^2-q^2}$ × $a^{q^2-r^2}$

= $a^{p^2-r^2}$

Simplifying the third term

5( $(a^p+r)^{p-r}$

= 5 $a^{(p+r)(p-r)}$ = 5 $a^{(p^2-r^2)}$

Performing the division, that is

$\frac{a^{(p^2-r^2)} }{5a^{(p^2-r^2)} }$ ← cancel $a^{(p^2-r^2)}$ on numerator/ denominator leaves

= $\frac{1}{5}$

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2 years ago

Please answer quickly:

mina [271]

You have to move variables on one side and constants on the other aby - b + b = c + b aby = c + b y = (c + b)/ab

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- Brandon arrives at practice at 5:30 PM. The team

nydimaria [60]

6:40pm Just add the minutes together to get 70 minutes that’s an hour and ten minutes then you get your answer

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2 years ago