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Ray Of Light [21]
3 years ago
13

To solve this system of equations by elimination, what operation could be used to eliminate the x-variable and find the value of

y? 2x − 4y = 6 −3x + 3y = 9 a) add 2 times the second equation to 3 times the first equation b) add 3 times the second equation to 2 times the first equation c) subtract 2 times the second equation from 3 times the first equation d) subtract 3 times the second equation from 2 times the first equation
Mathematics
2 answers:
gayaneshka [121]3 years ago
6 0
The system of equations are:

2x − 4y = 6
−3x + 3y = 9

To eliminate x, you should:
1. multiply first equation with 3
2. multiply second equation with 2
3. add the new equations you got

So your answer is A.
GuDViN [60]3 years ago
5 0

Answer:

A)  add 2 times the second equation to 3 times the first equation

Step-by-step explanation:

add 2 times the second equation to 3 times the first equation

3(2x − 4y = 6)

2(−3x + 3y = 12)

6x − 12y = 18

−6x + 6y = 24

Adding the second equation to the first equation gives:

−6y = 42

y =  

42

−6

y = −7

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Bryce is solving this problem.
zavuch27 [327]

Answer:

The answer is C

2.640 and 10,560

Step-by-step explanation:

264 * 410 = (264 * 400) + (264 * 10) = 105,600 + 2640 = 2.640 and 10,560

6 0
3 years ago
I WILL GIVE BRAINLIEST!!!
Katyanochek1 [597]

Answer:

g(x) = (f-x)

Step-by-step explanation:

It's relection across the y axis

==> g(x) = (f-x)

6 0
3 years ago
A poll found that 53% of a sample of 1170 teens in a certain large country go online several times a day. (Treat this sample as
posledela

Answer:(a) margin error = 2.4%

(b) The margin error gives the measure in percentage of how the population parameter determined differ from the real population statistics or value.

(c) in 90% of the samples of teens in the country, the percent who go online several times a day will be within 50.6% and 55.4%. of the estimated 100%

Step-by-step explanation:

Using the proportion formulae

Margin error = z √p(1-p)/n

n= 1170, p = 53% = 0.53, 1-p = 0.47

and the z value at 90% C.I = 1.645

M error= 1.645 √0.53×0.47/1170

Margin error = 0.024 = 0.024 ×100

Margin error = 2.4%

53 - 2.4 = 50.6% and 53 + 2.4 = 55.4%

In other words 90% of the time: the number of teens who go online several time a day will be between 50.6 and 55.4%.

8 0
3 years ago
write an equation in slope intercept form of the line that passes through (3,1) and has a y-intercept of-2
attashe74 [19]
your answer would be y = 1/5x -2
3 0
2 years ago
Simplify the expression. sine of x to the second power minus one divided by cosine of negative x
slega [8]

Answer:

the answer is the letter a) -sin x

Step-by-step explanation:

Simplify the expression.

sine of x to the second power minus one divided by cosine of negative x

(1−sin2(x))/(sin(x)−csc(x))

sin2x+cos2x=11−sin2x=cos2x

cos2(x)/(sin(x)−csc(x))csc(x)=1/sin(x)cos2(x)/(sin(x)− 1/sin(x))= cos2(x)/((sin2(x)− 1)/sin(x))sin2(x)− 1=-cos2(x)cos2(x)/(( -cos2(x))/sin(x))

=-sin(x)

4 0
3 years ago
Read 2 more answers
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