All categories

2 years ago

Find an equation of a line through (2, 1) and perpendicular to −2x + 4y = 8

1 answer:

4 0

Hello:
the equation is : y = ax+b
the slope is a : a×(1/2) = -1......( perpendicular to a line with a slope of 1/2) because : -2x+4y =8...y=(1/2)x+2 )

a = -2 y=(-2x+b
the line that passes through (2,1) :1 = -2(2)+b
b =5
 the equation is : y = -2x+5

You might be interested in

What is 7x^2-8x-9=-3x rounded to the nearest hundredth

jonny [76]

Answer: 1.55, and -0.83

Step-by-step explanation:

5 0

2 years ago

A group of 16 people is choosing a chairperson and vice-chairperson. They put all 16 people's names into a hat. The first name d

Strike441 [17]

Answer:

2 in 16

Step-by-step explanation:

6 0

2 years ago

Minnesota Public Radio wants to duplicate a survey conducted in 2016 that found that 65% of adults living in Minnesota felt that

vesna_86 [32]

Answer:

The number of people needed is $n =684$

Step-by-step explanation:

From the question we are told that

The population proportion is $p = 0.65$

The margin of error is $E = 0.03$

From the question we are told the confidence level is 90% , hence the level of significance is

$\alpha = (100 - 90 ) \%$

=> $\alpha = 0.10$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.645$

Generally the sample size is mathematically represented as

$n =[ \frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * p(1-p)$

=> $n =[ \frac{1.645 }{0.03} ]^2 * 0.65(1-0.65)$

=> $n =684$

6 0

3 years ago

Please help me, sorry if it’s blurry.

slamgirl [31]

Answer:

decagon is 36° 20-gon is 18°

Step-by-step explanation:

divide de number of sides by 360

N/360

10/360= 36

8 0

3 years ago

Read 2 more answers

5. What is the equation of the line with slope 3 and y-intercept -5?

ValentinkaMS [17]

Answer:

y = 3x -5

Step-by-step explanation:

Use the slope-intercept form:

y = (slope)x + intercept

slope = 3

intercept = -5

Equation in slope-intercept form:

y = 3x -5

7 0

2 years ago

Read 2 more answers