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kiruha [24]
3 years ago
8

Use the elimination method to solve the system of equations. Choose the

Mathematics
1 answer:
Anarel [89]3 years ago
8 0

Answer:

D. (6,6)

Step-by-step explanation:

Given the system of two equations

\left\{\begin{array}{l}3x+5y=48\\ \\-3x+5y=12\end{array}\right.

1. Add these two equations:

3x+5y-3x+5y=48+12\\ \\10y=60\\ \\y=6

2. Subtract these two equations:

(3x+5y)-(-3x-5y)=48-12\\ \\3x+5y+3x-5y=36\\ \\6x=36\\ \\x=6

Hence, the solution to the system is (6,6)

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mash [69]

Answer:

47

Step-by-step explanation:

Plug the numbers in and solve

5 ^ 2 + 2 ( 5 + 6 )

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3 years ago
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A study of commuting times reports the travel times to work of a random sample of 1010 employed adults in Chicago. The mean is x
MrMuchimi

Answer:

standard error of the mean = 1.6960

Step-by-step explanation:

Given -

Mean (\overline{X}) = 53 minutes

Standard deviation ( s ) = 53.9 minutes

n = 1010

standard error of the mean  =  

\sigma _{\overline{X}}    =   \frac{s}{\sqrt{n}}

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3 years ago
I need help on my math
shtirl [24]

Answer:

y = -5/4x - 4

Step-by-step explanation:

The equation they give you is in slope intercept form.  y=mx+b.  The m is the slope (-5/4).  Since they want a parallel line you keep the same slope for point slope form.  Point slope formula is y-y1=m(x-x1). the y1 and x1 are where you plug in the coordinates they give you.

y - 1 = -5/4x (x + 4)

y - 1 = -5/4x - 5

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3 years ago
Find the area of a regular triangle with side length of 15.5 inches
Ganezh [65]

Answer:

Brainliest pls

Step-by-step explanation:

A≈104.03in²

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F(x) = 3x + 3; Find f(1)
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Answer:

f(1) = 6

Step-by-step explanation:

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2 years ago
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