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brilliants [131]

3 years ago

9

Is the system of equations consistent, consistent and coincident, or inconsistent? Y=-x-1 / 3y=-3x+2

1 answer:

Neporo4naja [7]3 years ago

3 0

I hope this helps you

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9x - y = 15 2x + 8y = 28

faust18 [17]

9x - y = 15
2x + 8y = 28

Use the substitution method.
Solve for y in the first equation.

9x - y = 15
-y = 15 - 9x
y = -15 + 9x

Now plug in y into the second equation.
2x + 8(-15 + 9x) = 28
2x - 120 + 72x = 28
74x - 120 = 28
74x = 148
x = 2

Plug x back into the rewritten first equation.
y = -15 + 9(2)
y = -15 + 18
y = 3

x = 2, y = 3

5 0

3 years ago

In a metal fabrication process, metal rods are produced to a specified target length of 15 feet. Suppose that the lengths are n

Leto [7]

Answer:

95% Confidence interval: (14.4537 ,15.1463)

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 15 feet

Sample mean, $\bar{x}$ = 14.8 feet

Sample size, n = 16

Alpha, α = 0.05

Sample standard deviation, σ = 0.65 feet

Degree of freedom = n - 1 = 15

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 15 and}~\alpha_{0.05} = \pm 2.1314$

$14.8 \pm 2.1314(\dfrac{0.65}{\sqrt{16}} ) \\\\= 14.8 \pm 0.3463 = (14.4537 ,15.1463)$

is the required confidence interval for the true mean length of rods.

3 0

3 years ago

Read 2 more answers

The ratio of length to weight in Gus's driveway is 13 yards to 4yardd. What is this ratio in feet?

artcher [175]

(13/4)*3 = 39/4 ft
I believe that's the answer

5 0

3 years ago

√50, √8, whats the area of the triangle no picture

Bas_tet [7]

Answer:

Area = 10

Step-by-step explanation:

( $\sqrt{50}$ × $\sqrt{8}$ ) ÷ 2 = 10

6 0

3 years ago

Which expression is equivalent to 6x^5 z^3 4x^4 z^2

Delicious77 [7]

Answer:

24x^9*z^5

Step-by-step explanation:

combine coefficients and add exponents for like terms

hope this helps you :)

4 0

3 years ago

Read 2 more answers