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velikii [3]
2 years ago
12

Y=13x − 1x − 3y = 5 What is the solution to the system of equations shown above? ​​

Mathematics
1 answer:
Soloha48 [4]2 years ago
3 0

Answer:

(5/3,5)

Step-by-step explanation:

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15/40 x 100 = 37.5
equation for percent decrease is diiference/original x 100.
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Which triangle congruence criteria will determine congruence for the given 1 point
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Determine the average rate of change from 0 to 4 for the function f(x)=2^x-3
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4 0
3 years ago
Evaluate -5-15+4+15
defon

Answer:

-1

Step-by-step explanation:

-5-15+4+15

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7 0
3 years ago
Read 2 more answers
Determine the astm grain size number if 33 grains per square inch are measured at a magnification of 270×
strojnjashka [21]
8.9

The equation for the grain size is expressed as the equality:
Nm(M/100)^2 = 2^(n-1)
where
Nm = number of grains per square inch at magnification M.
M = Magnification
n = ASTM grain size number

Let's solve for n, then substitute the known values and calculate.
Nm(M/100)^2 = 2^(n-1)

log(Nm(M/100)^2) = log(2^(n-1))
log(Nm) + 2*log(M/100) = (n-1) * log(2)
(log(Nm) + 2*log(M/100))/log(2) = n-1
(log(Nm) + 2*log(M/100))/log(2) + 1 = n

(log(33) + 2*log(270/100))/log(2) + 1 = n
(1.51851394 + 2*0.431363764)/0.301029996 + 1 = n
(1.51851394 + 0.862727528)/0.301029996 + 1 = n
2.381241468/0.301029996 + 1 = n
7.910312934 + 1 = n
8.910312934 = n

So the ASTM grain size number is 8.9

If you want to calculate the number of grains per square inch, you'd use the
same formula with M equal to 1. So:
Nm(M/100)^2 = 2^(n-1)
Nm(1/100)^2 = 2^(8.9-1)
Nm(1/10000) = 2^7.9
Nm(1/10000) = 238.8564458
Nm = 2388564.458

Or about 2,400,000 grains per square inch.
7 0
3 years ago
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