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aksik [14]
3 years ago
13

Solve the system of linear equations by substitution. y−x=0y−x=0 2x−5y=9

Mathematics
1 answer:
Naddik [55]3 years ago
6 0
There are no solutions to 2x-5y=9 but if you are solving it by y=mx+b form than your answer would look like this: y=2/5x-9/5
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The length of human pregnancies from conception to birth varies according to an approximately normal distribution with a mean of
Varvara68 [4.7K]

Answer:

A) 68.33%

B) (234, 298)

Step-by-step explanation:

We have that the mean is 266 days (m) and the standard deviation is 16 days (sd), so we are asked:

A. P (250 x < 282)

P ((x1 - m) / sd < x < (x2 - m) / sd)

P ((250 - 266) / 16 < x < (282 - 266) / 16)

P (- 1 < z < 1)

P (z < 1) - P (-1 < z)

If we look in the normal distribution table we have to:

P (-1 < z) = 0.1587

P (z < 1) = 0.8413

replacing

0.8413 - 0.1587 = 0.6833

The percentage of pregnancies last between 250 and 282 days is 68.33%

B. We apply the experimental formula of 68-95-99.7

For middle 95% it is:

(m - 2 * sd, m + 2 * sd)

Thus,

m - 2 * sd <x <m + 2 * sd

we replace

266 - 2 * 16 <x <266 + 2 * 16

234 <x <298

That is, the interval would be (234, 298)

6 0
3 years ago
At what points does the helix r = left angle bracketsin(t), cos(t), tright angle bracket intersect the sphere x 2 + y 2 + z 2 =
r-ruslan [8.4K]

Answer:

the points are = (0.1045, 0.9945, 6) and ( -0.1045, 0.9945, -6)

Step-by-step explanation:

The detailed steps and appropriate substitution is as shown in the attached file.

4 0
3 years ago
Write an equation in slope-intercept form for the line with slope 4/3 and -3 intercept .
mojhsa [17]

Answer:

The equation would be y = 4/3x - 3

4 0
3 years ago
Use the formula m= v 2 -v 1 x 2 -x 1 to calculate the slope of the line The slope of the line is
Anit [1.1K]

Answer: I actually do not know but i know that the answer is A.

Step-by-step explanation:

I'm smart

6 0
3 years ago
Geometry- please help!!
defon
The answer would be 2/6 (first option)!
Geometric mean is 4.9, which is equal to 2 (square root) 6
3 0
3 years ago
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