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Helga [31]
3 years ago
11

Please help with the bottom questions not filled in <3

Mathematics
1 answer:
Airida [17]3 years ago
8 0

Answer:

Y=4,M=-1,X=2

4=-1(2)+b

4=-2+b

6=b

6

Step-by-step explanation:

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A random sample of 100 recorded deaths in the United States during the past year showed an average life span of 71.8 years. Assu
Oliga [24]

Answer:

This indicates that the chances of the mean life span today is greater than 70 years is 0.5871

Step-by-step explanation:

The past year showed an average life span of 71.8 years.

\mu = 71.8 years

Population standard deviation = 8.9 years

\sigma = 8.9 years

We are supposed to find the mean life span today is greater than 70 years

i.e. P(X>70)

Formula : Z = \frac{x-\mu}{\sigma}

Z=\frac{70-71.8}{8.9}

Z=−0.202

P(X<70)=0.4129

P(X>70)=1-P(X<70)=1-0.4129=0.5871

Hence This indicates that the chances of the mean life span today is greater than 70 years is 0.5871

7 0
4 years ago
Read 2 more answers
assume x and y are both differentiable functions of t. find dx/dt given x=-1 and dy/dt=8 for the relation: 4x^2+3y^3=28
melomori [17]

Given:

x and y are both differentiable functions of t.

4x^2+3y^3=28

x=-1\text{ and }\dfrac{dy}{dt}=8

To find:

The value of \dfrac{dx}{dt}.

Solution:

We have,

4x^2+3y^3=28       ...(i)

At x=-1,

4(-1)^2+3y^3=28

4+3y^3=28

3y^3=28-4

3y^3=24

Divide both sides by 3.

y^3=8

Taking cube root on both sides.

y=2

So, y=2 at x=-1.

Differentiate (i) with respect to t.

4(2x\dfrac{dx}{dt})+3(3y^2\dfrac{dy}{dt})=0

Putting x=-1, y=2 and \dfrac{dy}{dt}=8, we get

4(2(-1)\dfrac{dx}{dt})+3(3(2)^28)=0

-8\dfrac{dx}{dt}+9(4)(8)=0

-8(\dfrac{dx}{dt}-9(4))=0

Divide both sides by -8.

\dfrac{dx}{dt}-36=0

\dfrac{dx}{dt}=36

Therefore, the value of 4x^2+3y^3=28 is 36.

6 0
3 years ago
8 star fruit cost $16. How many star fruit can you buy for $8?
kompoz [17]

Answer:

4 star fruit.

Step-by-step explanation:

16/8 = 2

each star fruit is 2 dollars

so 8/2 = 4

you can buy 4 star fruit for 8 dollars.

5 0
3 years ago
Read 2 more answers
Anyone please .help me to solve this​
Wittaler [7]
The Correct Answer Is 10
4 0
4 years ago
Read 2 more answers
Sum of the exterior angles of polygons
Ne4ueva [31]

Answer:

360° .

Step-by-step explanation:

6 0
3 years ago
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