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irinina [24]
2 years ago
15

PLEASE URGENT (quadratic formula with step by step) 35 points!

Mathematics
1 answer:
Alborosie2 years ago
5 0

Answer: 1.828 HOPEFULLY ITS RIGHT.

Step-by-step explanation:

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Can eat 10 cookies every 4 hours. How many hours would it take for her to eat 67 cookies?​
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67 ÷ 10 x 4 = 26.8 hours for her to eat 67 cookies

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The probability of picking two black marbles from a box at random without replacement is 10/91 .
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The probability of the 2 events are multiplied to get the result 10/91

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6 0
3 years ago
A marching band is arranged in rows of 7 the first row has 3 band members and each row after the first has 2 more band members t
pav-90 [236]

Answer:

a_{n}= 1+2n and 63

Step-by-step explanation:

the question belongs to arithmetic sequence and a_{n} can be determined by the formula

a_{n}= a1 + d (n-1)

Let " a_{n} " represents the number of band members in the nth row

and 'd' represents the common difference.( as stated each row  has 2 more band members than the row before it)

therefore, d=2

'a1' represents first row that has three members. So, a1 = 3

->Rule for nth term will be:

a_{n}= 3 + 2(n-1)

a_{n}= 3 + 2n -2

a_{n}= 1+2n

-> In order to find total number of band members 'S_{7}'

Let S_{n} represent total number in n rows

We'll use the formula, i.e  S_{n} = n/1 (a_{1} +  a_{n})

where, n is the number of terms, a_{1} is the first term and a_{n} is the last term

So,

n=7

a_{7} = 1 + 2(7)= 15

=>S_{7} = 7/2 (3 + 15)

S_{7} = 63

The total number of band members are 63

8 0
3 years ago
Please help I’m having a hard time
Nata [24]

Answer:

4b³c⁴ + 2b⁴c³

Step-by-step explanation:

5b⁴c³ and 3b⁴c³ have the same variables. Therefore, they are like terms.

4b³c⁴ + 5b⁴c³ - 3b⁴c³

4b³c⁴ + 2b⁴c³

3 0
2 years ago
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