How to solve a system of equations

1 answer:

3 0

First , you need to use elimination method .In the elimination method you either add or subtract the equations to get an equation in one variable .

I hope that's help !

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Use the provided ruler. Suppose you recreate the drawing so that it has a scale of 1 cm : 4 m. What will the length and width of

Burka [1]

I think the answer is 1 cm: 2 m

5 0

3 years ago

Vector u has its initial point at (1, -12) and its terminal point at (18, 6). Vector v points in a direction opposite that of u,

ankoles [38]

First compute the component form of vector u by subtracting its initial values from terminal values. 18-1=17, 6-(-12)=18. So u=(17, 18). Since v points in the opposite direction, and has a magnitude three times that of u, we multiply the u by -3 and get v=(-3*17, -3*18)=(-51, -54).

7 0

3 years ago

Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.7

Zinaida [17]

Answer:

(a) The probability that the sample average sediment density is at most 3.00 is 0.092.

The probability that the sample average sediment density is between 2.70 and 3.00 is 0.477.

(b) The sample size must be at least 77.

Step-by-step explanation:

The random variable X ca be defined as the sediment density (g/cm) of a specimen from a certain region.

The random variable X is normally distributed with mean, μ = 2.7 and standard deviation, σ = 0.75.

(a)