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3 years ago

Use the quadratic formula to solve x² + 9x + 10 = 0.

Mathematics

2 answers:

valentina_108 [34]3 years ago

7 0

C.x=-7.7 and x=-1.3 should be the answer

maxonik [38]3 years ago

6 0

C SOULD BE THE RIGHT ANSWER

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A culture of 3,000 bacteria quadruples in number every 10 hours. Plt) represents the

Levart [38]

Answer:

P(t) = 3000 * 4^(t/10)

Step-by-step explanation:

There is more than one way to get an exponential function out of the information given. The way the question is worded, however, seems to suggest the following type of answer:

One general form of the exponential function is y = a·bx, where a is the initial value, and b is the growth or decay factor. So right away we can say that a = 2300.

Now for the growth factor. When something is increasing or decreasing by a certain percentage, we are adding or subtracting that percentage to the 100% (which is equal to 1) that exists currently. So here we're increasing by 11%, or 0.11. Then the growth factor b is (1 + 0.11), or 1.11.

4 0

3 years ago

1)How many ways can the letters in the word BOOKKEEPER be arranged? (Must show set-up )

sergeinik [125]

Question 1

There are 5 letters (B, O, K, E, R) and there is a total of 10 letters to make up the word.
There are $\frac{10!}{(10-6)!6!}$ ways of arranging the letters, which equal to 210 ways

Question 2

There are seven swimmers in total.
There are $\frac{7!}{(7-1)!1!}$ ways of choosing the first winner, which is 7 ways
There are $\frac{6!}{(6-1)!1!}$ ways of choosing the second winner, which is 6 ways
There are $\frac{5!}{(5-1)!1!}$ ways of choosing the third winner, which is 5 ways
There are 7×6×5=210 ways of choosing first, second, and third winner

Question 3

The probability of eating an orange and a red candy is $\frac{15}{31}$ × $\frac{9}{30}$ , which equals to $\frac{9}{62}$

The probability of eating two green candies is $\frac{7}{31}$ × $\frac{6}{30}$ which equals to $\frac{7}{155}$

3 0

3 years ago

Is this a proportional relationship? Please help!

OLEGan [10]

Answer:

Step-by-step explanation:

If you draw a line, it will not go through the origin and there isn't a constant rate of change.

6 0

2 years ago

Put these in order from least to greatest kilometer,millimeter,inches,yards,centimeter,miles,meter

Dafna11 [192]

<span>centimeter, inch, yard, meter, kilometer, mile</span>

7 0

3 years ago

I’ll mark brainliest if correct !!!!

Artemon [7]

Answer:

the probability is 1

Step-by-step explanation:

8 0

3 years ago