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3 years ago

9._

Mathematics

1 answer:

jasenka [17]3 years ago

3 0

It would be 7/10 because since 10/10 is the Earth, and 3/10 is water, 10-3 is 7.

Step-by-step explanation: ITS RIGHT CAUSE I ACTUALY THOUGHT ABOUT IT

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(CO 5) An advocacy group claims that the mean braking distance of a certain type of tire is 75 feet when the car is going 40 mil

KIM [24]

Answer:

z=0.5084

p=0.2809

Step-by-step explanation:

Since number of tires tested for breaking distance is enough (>30), the standardized test statistic is calculated by the formula:

z= $\frac{X-M}{\frac{s}{\sqrt{N} }} }$ where

X is the mean breaking distance in the sample (78)
M is the mean breaking distance (75)
s is the standard deviation (5.9)
N is the sample size

Putting the numbers in the formula:

z= $\frac{78-75}{\frac{5.9}{\sqrt{N} }} }$ =0.5084 and corresponding p value is:

p=0.28

4 0

3 years ago

Foactoring Diff/ Sum of Cubes <br><br>Factor completely

Ira Lisetskai [31]

it is sum of cubes.

hope that helps

3 0

3 years ago

What is the value of sin-1(1)? negative startfraction pi over 2 endfraction 0 startfraction pi over 2 endfraction π

mariarad [96]

The value of sin-1(1) is negative startfraction pi over 2 endfraction, startfraction -pi over 2 endfraction.

<h3>What is the value of sin (π/2)?</h3>

The value of sin (π/2) is equal to the number 1. The value of the sin-1(1) has to be find out.

Suppose the value of this function is <em>x</em>. Thus,

$x=\sin^{-1}(1)$

Solve it further,

$\sin(x)=(1)$ ......1

The value of sin (π/2) and -sin (-π/2) is equal to 1 such that,

$\sin\dfrac{\pi}{2}=-\sin\left(-\dfrac{\pi}{2}\right)=1$

Put this value in the equation 1,

$\sin(x)=\sin\left(\dfrac{\pi}{2}\right)=-\sin\left(-\dfrac{\pi}{2}\right)$

Thus, the range will be,

$\left(\dfrac{\pi}{2},-\dfrac{\pi}{2}\right)$

Thus, the value of sin-1(1) is negative startfraction pi over 2 endfraction, startfraction -pi over 2 endfraction.

Learn more about the sine values here;

brainly.com/question/10711389

3 0

2 years ago

12 is what percent of 24? What percent of 35 is 7? What percent of 90 is 9? 20 out of 60 is what percent?

irinina [24]

Answer:

12 is 50% of 24

7 is 20% of 35

9 is 10% of 90

20/60 is 33.33%

3 0

1 year ago

Read 2 more answers

Which ordered pair is the solution to the system of equations?

SOVA2 [1]

To find the solution, we use the substitution method.

x+y=-1
<span>x-3y=11
</span>
x+y = -1-y
-y

x = -1-y

Now apply the value of x into the other equation.

x-3y=11
-1-y-3y = 11

Combine like terms

-4y -1 = 11
+1 +1
-4y = 12

-4y = 12
-4y/-4 = 12/-4
y = -3

Now, apply the value of Y to one equation to find x.

y = -3

x -3 = -1
+3 +3

x= 2

Now we have the value for both, x and y.
x = 2
y =-3

Final answer: A. <span>(2, −3)</span>

3 0

3 years ago