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crimeas [40]
2 years ago
10

3x + y = 4 x - 2y = 3

Mathematics
1 answer:
Anna007 [38]2 years ago
7 0
Eliminate y's
multily top equation by 2 and add to 2nd

6x+2y=8
<u>1x-2y=3 +</u>
7x+0y=11

7x=11
x=11/7
sub back


x-2y=3
11/7-2y=3
add 2y both sides
11/7=2y+3
minus 3 which is 21/7
-10/7=2y
divide by 2 or times 1/2
-5/7=y


(x,y)
( \frac{11}{7},  \frac{-5}{7})

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3.55 x 4
thats the amount per bag times the number of bags you buy. 
use a calculator and you get $14.20

ANSWER-------> $14.20
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Explain why the formula for sample variance is different from the formula for population variance. Why is it inappropriate to us
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Step-by-step explanation:

The difference in the formula of population and sample variance can be explained as:

Population variance is said to be the value of variance that is calculated from population data, whereas sample variance refers to the variance calculated from sample data. This is the reason why value of denominator in the formula for variance in case of sample data is ‘n-1’, while it is ‘n’ for population data. Hence, the result of both variance and standard deviation derived from sample data is larger than those found out from population data.

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2 years ago
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Answer:

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Step-by-step explanation:

The inscribed angle (5x - 3) is equal to half the measure of the intercepted arc

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10x - 6 = 9x + 1 ( subtract 9x from both sides )

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5 0
3 years ago
HELP ME ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing.
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Answer:

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Which is traveling faster, a car whose velocity vector is 201 + 25), or a car whose velocity vector is 30i, assuming that the un
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Answer:

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Step-by-step explanation:

Let's assume that

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=> speed of first car,

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Hence, 2nd car is running faster than the first car by 2.01 units.

8 0
3 years ago
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