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2 years ago

Factor completely. 25 - 64x2

Mathematics

1 answer:

Murljashka [212]2 years ago

3 0

Answer:

Factor 25−64x2

−64x2+25

=(8x+5)(−8x+5)

Answer:

(8x+5)(−8x+5)

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Enter the unknown value that makes this statement true 40% of ______ is 60

SpyIntel [72]

40% of 150 is 60. That’s math

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2 years ago

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Help me i need help badly again

Irina-Kira [14]

Alright, given that it's a male then

total of 4+6+2+2 or 14 pepole are male
4 of them are freshmen

so the probalbity would be 4/14 or 2/7 or aprox 0.28571428571428571428571428571429

about 29%

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2 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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2 years ago

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2. The seventh grade class is putting on a variety show to raise

ladessa [460]

Answer:

Step-by-step explanation:

15 x 10 = 150

150 x 6 = 900

15 x 7 = 105

900 + 105 = 1005

closest to 1000 without decimals