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3 years ago

Dont understandd helppp

Mathematics

1 answer:

Romashka [77]3 years ago

8 0

Answer:

y $\leq$ -12 or y $\geq$ -4

Subtract 6 from both sides 3|y+8|+6-6 $\geq$ 18-6
Simplify 3|y+8| $\geq$ 12
Divide both sides by 3
Simplify |y+8| $\geq$ 4
Apply absolute rule y+8 $\leq$ -4 or y+8 $\geq$ 4
Combined the interval y $\leq$ -12 or y $\geq$ -4

<h2>y $\leq$ -12 or y $\geq$ -4</h2><h2>:) Hope You Enjoy :)</h2><h2> They are both real numbers :)</h2>

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Help fast pls i’ll give a lot of points

photoshop1234 [79]

Answer:

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Step-by-step explanation

3 0

4 years ago

Please answer this it would be very helpful if you did.

Dmitriy789 [7]

Answer:

See below ↓↓↓

Step-by-step explanation:

Probability of getting heads

Outcome (head) = 1
Total outcomes = 2
P (head) = 1/2

Probability of getting an odd number

Outcome (odd) = {1, 3, 5} = 3
Total outcomes = 6
P (odd) = 3/6 = 1/2

The outcomes are equally likely because the probabiity of each outcome is the same.

5 0

2 years ago

The weights of adult male beagles are normally distributed, with a mean of 25 pounds and a standard deviation of 4 pounds.

Andrews [41]

Answer:

A) 8

Step-by-step explanation:

Mean weight = u = 25 pounds

Standard Deviation = $\sigma$ = 4 pounds

We have to find how many beagles out of 75 will weigh more than 30. Since the data is normally distributed, we can use z score to find this value. First we will what is the percentage(probability) of a randomly selected beagle to weigh more than x = 30 pounds, using this percentage we can then find our answer.

The formula for z score is:

$z=\frac{x-u}{\sigma}$

Using the values, we get:

$z=\frac{30-25}{4}=1.25$

So, P(Weight > 30) is equivalent to P(z > 1.25). Using the z table, we can write:

P(z > 1.25) = P(Weight > 30) = 0.1056

This, 0.1056 or 10.56% of the beagles are expected to weigh more than 30 pounds.

So,out of 75 beagles, 10.56% of 75 are expected to weigh more than 30 pounds.

10.56% of 75 = 0.1056 x 75 = 7.92 = 8 (rounding to nearest integer)

Therefore, out of 75 beagles 8 are expected to weigh more than 30 pounds.

6 0

3 years ago

Find the average rate of change of the function over the given interval.. h(t) = cot t, intervals given [pi/4, (3pi)/4]. I've go

Phantasy [73]

Hi! All you need to know is that cot stands for cotangent and its the reciprocal of tan i.e. cot(x) = 1/tan(x). You probably know that tan(pi/4) = 1 and that tan(3pi/4) = -1. Happily in these cases it means that cot and tan come out the same (1/1 = 1 and 1/-1 = -1). -1 - (+1) = -2 and this divided by pi/2 = -2/(pi/2) which looks a bit untidy so multiply the top and bottom by 2 (to get rid of the 2 in pi/2) and the answer is -4/pi. HTH

3 0

4 years ago

A man can walk from A to B and back in a certain time at 7 km/hr.If he walks from A to B at 8 km/hr and returns from B to A at 6

DerKrebs [107]

We calculate the speed by dividing the distance over time:
s = d/t
So the distance described in the problem is always the same, A to B and B to A.
But we are told that;
7 = d/t
7 = 2d/(t + 2)
that is, the first equation say that at speed 7 km/h a distance d is walked in a time t
the second equation say that at a average speed of 7 (that is 8 on one way and 6 in the other: 8 + 6 = 14, half of it), twice the distance is walked in a time equal to the first time plus 2 minutes.
So we have a system of linear equations, 2 of them with two unknowns, we can solve that:
7 = d/t
7 = 2d/(t + 2)
lets simplify them:
7t = d
7(t + 2) = 2d
7t = 2d - 14
we substitute the first in the second:
7t = 2d - 14
7t = d
so:
d = 2d - 14
d = 14
so the distance between A and B is 14 km

4 0

4 years ago

Dont understandd helppp​

Dont understandd helppp