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2 years ago

Which choice is equivalent to the expression below?

Mathematics

1 answer:

enyata [817]2 years ago

3 0

Answer: B

Step-by-step explanation:

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Rachel is keeping track of how much water she drinks. On Friday, she drank two bottles of water with snacks and 5 cups of water

xeze [42]

Answer:

2 CUPS

Step-by-step explanation:

Write two equations, where "b" = bottles, and "c" = cups

2b +5c = b +7c -->

b = 2c

THERE ARE 2 CUPS IN A BOTTLE

6 0

3 years ago

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The quotient of a number and 6 is less than 20.

ozzi

Answer:

$\frac{x}{6}$ < 20

Step-by-step explanation:

hope this help idrk how to explain this one lol

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2 years ago

Scientists have discovered a vaccine for a debilitating disease. This year there were 570,000 reported new cases of the disease

Ket [755]

Answer: There are approximately 853827 new cases in 6 years.

Step-by-step explanation:

Since we have given that

Initial population = 570000

Rate at which population decreases is given by

$\frac{2}{3}$

Now,

First year =570000

Second year is given by

$570000\times (\frac{1}{3})$

Third year is given by

$570000(\frac{1}{3})^2$

so, there is common ratio ,

it becomes geometric progression, as there is exponential decline.

so,

$570000,570000\times \frac{1}{3},570000\times( \frac{1}{3})^2,......,570000\times (\frac{1}{3})^6$

a=570000

common ratio is given by

$r=\frac{a_2}{a_1}=\frac{1}{3}$

number of terms = 6

Sum of terms will be given by

$S_n=\frac{a(1-r^n)}{(1-r)}$

We'll put this value in this formula,

$S_6=\frac{570000(1-(\frac{1}{3})^6}{(1-\frac{1}{3})}\\\\=853827.16$

So, there are approximately 853827 new cases in 6 years.

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2 years ago

Help needed now with Math question.

saveliy_v [14]

Answer:

is the last one

Step-by-step explanation:

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2 years ago

9. 2b - 6 + 3b = 14<br> Solve

ZanzabumX [31]

Answer: The answer would be b=4

4 0

2 years ago

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