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Sedaia [141]
3 years ago
6

A train travels 250 miles at a constant speed (x) in miles per hour.write an equation that can be used to find the speed of the

train if the time to travel 250 miles is 5 hours
Mathematics
1 answer:
77julia77 [94]3 years ago
8 0

Answer:

use this

Step-by-step explanation:

velocity = distance / time…. So distance = velocity x time

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Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of bacteria. He obtained the following
olya-2409 [2.1K]

Answer:

0.5613

Step-by-step explanation:

Here mean strain of bacteria x = sum of all numbers/ total numbers = 0.5514 %

Standard deviation s = 0.0040 %

Test statistic

G = (x_{max} -x)/s = (0.5613 - 0.5514)/ 0.0040 = 2.475

95% confidence value for outlier for n = 8 and alpha = 0.05

G_{critical} = 2.1266

so here we see that G > G_critical , so we reject that the there is no outlier . the value of 0.5613 is and outlier.

7 0
3 years ago
Find the x-intercepts of the parabola with vertex (1, -9) and y intercept at (0, -6).
Sergio [31]
Hello,

Equation is y=k(x-1)²-9
and when x=0,y=-6==>-6=k*1²-9==>k=3

y=3(x-1)²-9
when y=0, 3(x-1)²-9=0
==>(x-1-√3)(x-1+√3)=0
x-intercepts are (1+√3,0) and (1-√3,0)

Answer B.

3 0
3 years ago
Someone please help.
umka21 [38]

Let's go:


\frac{y}{3} = \frac{27}{y} \\\\ y^2 = 27.3 \\\ y^2 = 81 \\\ y = \sqrt{81} \\\ y = 9


I hope I helped you.


8 0
3 years ago
What is x to the 3 power
Natasha_Volkova [10]

Answer:

x to the third power is x cubed or x^3.

6 0
4 years ago
Read 2 more answers
Can someone answer my questions please ._.
tekilochka [14]

Answer:

wheres the question?

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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