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geniusboy [140]
3 years ago
12

Solve the equation 5(x-2)=7(x+4) for x

Mathematics
1 answer:
Sphinxa [80]3 years ago
3 0

Answer:

\boxed{\bold{x=-19}}

Step By Step Explanation:

Expand \bold{5\left(x-2\right): \ 5x-10}

Expand \bold{7\left(x+4\right): \ 7x+28}

\bold{5x-10=7x+28}

Add 10 To Both Sides

\bold{5x=7x+38}

Subtract 7x From Both Sides

\bold{5x-7x=7x+38-7x}

Simplify

\bold{-2x=38}

Divide Both Sides By -2

\bold{\frac{-2x}{-2}=\frac{38}{-2}}

Simplify

\bold{x=-19}

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The 2nd one is right just did the test
Vikki [24]

Answer:

ok lol

Step-by-step explanation:

4 0
3 years ago
a line is perpendicular to y=-2x+5 and intersects the point (-4,2). what is the equation of this perpendicular line?
german

Answer:

y = 1/2x + 4

Step-by-step explanation:

If the line is perpendicular to y = -2x + 5 then the new line has a slope of 1/2.

So solve for b: using y = mx + b

2 = 1/2(-4) + b

2 = -2 + b

4 = b

Put it all together

y = 1/2x + 4

6 0
3 years ago
The average and standard deviation of a measurement is 15.0 ± 5.0. if 100 students measured the value, how many would you expect
AURORKA [14]

Solution: We are given:

\mu=15, \sigma=5

Using the empirical rule, we have:

\mu \pm \sigma covers 68% of data.

Also the percentage of values below mean = Percentage of values above mean = 50%

Now, let's find the z score for x=20

z=\frac{20-15}{5}=1

Therefore, the percentage of values greater than 1 standard deviation above mean 50\% - \frac{68\%}{2} =50\%-34\%=16%

Expected number of students = 16% of 100 = 16


4 0
4 years ago
Sketch the curve y=(3x-4)(4x-3)^2
Katyanochek1 [597]
Google has the complete curve of the graph. just search this- <span>y=(3x-4)(4x-3)^2 and it shows. 

Hope this helps!</span>
4 0
4 years ago
An isosceles triangle has an angle that measures 92° which other angles could be in that isosceles triangle choose all that appl
nignag [31]

Answer:

44

Step-by-step explanation:

The two base angles cannot both be 92 degrees because they would add up to 184 which is more degrees than any triangle has. The apex angle (the top angle) therefore has 92 degrees.

The base angles are equal and found as follows.

2*b + 92 = 180                 Subtract 92 from both sides

2b +92-92 = 180-92

2b = 88                           divide by 2

2b/2=88/2

b = 44

The only angle measurement that fits is 44

6 0
3 years ago
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