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4 years ago

Select the correct answer. witch is the correct simplified form of the expression

Mathematics

2 answers:

GREYUIT [131]4 years ago

7 0

Answer:

Step-by-step explanation:

-1/3 -1/2 = -5/6

1/2-1/4 = 1/4

The negative makes the reciprocal

x^1/4/y^5/6

frez [133]4 years ago

6 0

Answer:

Step-by-step explanation:

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Please HELPP!! I’ll give brainiest for #2

34kurt

Answer: 480

Step-by-step explanation:

you take 240 and add it to itself and that is how you get you correct answer

3 0

3 years ago

The 2014 draft picks for the NBA basketball teams have heights that are approximately normally distributed with mean 79.1 inches

ryzh [129]

It is given that the mean is 79.1 inches and standard deviation is 3.0 inches so it follows:

$\mu=79.1,\sigma=3$

So the value from 75 to 81 is given by:

$\begin{gathered} P(75\leq x\leq81)=P(x\leq81)-P(x\leq75) \\ =P(z\leq\frac{81-79.1}{3})-P(z\leq\frac{75-79.1}{3}) \\ =P(z\leq0.63)-P(z\leq-1.36) \end{gathered}$

Use the table or a software to get the probability values and substitute to get the probability value as:

The probability is 0.6509.

3 0

1 year ago

A train goes from New Orleans to Boston at 40 mph. On the way back it returns with a speed of 80 mph. If it takes it an hour les

Serggg [28]

Let's say the distance is "x".

time = distance / rate

time1 = x / 40

time2 = x/80

A) time1 shoud be twice time2 or (time1 / time2) =2

B) time1 -1 = time2

Substituting equation B) into A)

((time1 / (time1 -1) = 2

time1 = 2* time1 -2

time1 = 2 hours time2 = 1 hour

Distance = 80 miles

1st trip time1 = 80/40 = 2 hours

return trip time2 = 80/80 = 1 hour

total trip = 160 miles in 3 hours

average speed = 53.333333 miles per hour

3 0

3 years ago

Find an equation of the circle that has center (-1, 3) and passes through (-4, -2)

shepuryov [24]

Answer:

Your answer would be $(x + 1)^{2} + (y - 3)^{2} = {34}$ .

Step-by-step explanation:

The formula for the equation of a circle is $(x - h)^{2} + (y - k)^{2} = r^{2}$ , where (h, k) is the center of the circle, and r is the radius. Since the center is (-1, 3), the left half of the equation is $(x + 1)^{2} + (y - 3)^{2}$ . Now, all we have to do now is find the radius, r. To do that, you can use the distance formula to find the distance between the center (-1, 3) and a point that passes through the circle, or is on the circumference, (-4, -2). When you calculate that, you will get $d = \sqrt{34}$ , so the radius is $\sqrt{34}$ . But, we want the radius squared, which is 34. So, the final answer is what I wrote above.