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3 years ago

A,b,c or d please help i don’t understand this

Mathematics

1 answer:

alexira [117]3 years ago

7 0

uhm the answer is D. sorry if am wrong

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Use the equation below to find a, if b = 5 and c = 12 a = 27 - b - c

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Answer: 10

a=27-5-12=10

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2) Chicken soup is 3 cans for $0.55. How much would a dozen soup cans cost?

Elenna [48]

Answer:

It would cost $2.20

Step-by-step explanation:

If 3 cans = $.55

then 3*4 = 12

soooo 4*.55 = 2.20

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Stan's heart rate, in beats per minute, was measured 20 times at random. The results are 82, 84, 98, 112, 97, 93, 91, 87, 112, 8

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Answer:

(80.4942, 94.9052)

Step-by-step explanation:

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The sample standard deviation is s = 11.26.

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3 years ago

The common difference in an arithmetic sequence is –2 and the first term is 47. What is the 29th term?

BlackZzzverrR [31]

An arithmetic sequence is an ordered list of numbers where the next number is found by adding on to the last number (ex: 2,5,8,11... is a sequence where 3 is added on to find the next number).

The equation for an arithmetic sequence is
$A_{n}=A_{1}+(n-1)d$

$A_{n}$ is the "n-th" number in the sequence (ex: is the first term in the sequence)
d is the number you add (common difference) to find the next number
The first number in the sequence is 47 so $A_{1}=47$
d=-2 because the question gives you that

$A_{n}=A_{1}+(n-1)d$
 $A_{29}=47+(29-1)(-2)$
 $A_{29}=47+(28)(-2)$
 $A_{29}=47+-56$
 $A_{29}=-9$

The answer is A. -9.

 

The answer is C. 158

For the second one, it gives you $A_{1}=4$ and $A_{}=18$
You can use this to find d

 $A_{n}=A_{1}+(n-1)d$
 $A_{3}=4+(3-1)d$
 $18=4+(3-1)d$
 $18=4+2d$
 $14=2d$
 $7=d$

Now you can just solve using the equation normally.
 $A_{n}=A_{1}+(n-1)d$
 $A_{23}=4+(23-1)(7)$
 $A_{23}=4+(22)(7)$
 $A_{23}=4+154$
 $A_{23}=158$

The answer is C. 158

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3 years ago

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Which expression is equivalent to 4C0m430 + 4C1m331 + 4C2m232 + 4C3m133 + 4C4m034? 4x4 + 12x3 + 54x2 + 108x + 81 4x4 + 12x3 + 54

Ymorist [56]

Answer:

its the last one

Step-by-step explanation:

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