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3 years ago

What does 9x-4x equal

Mathematics

1 answer:

EleoNora [17]3 years ago

6 0

It equals 5x cause unless you know what x is thats the best you can do.

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You perform 7000 significance tests using a significance level of 3%. Assuming that the null hypothesis is true, how many of the

mr Goodwill [35]

Answer:

210

Step-by-step explanation:

we have given significance level α=3% =0.03

level of significance is nothing but the chances of rejecting a null hypothesis by the test when it given that it is correct. it is denoted by α it also defined as the

level of significance =1 - confidence level

now statistically significant test =0.03×7000=210

so the expected value of statistical significant is 210

4 0

4 years ago

A cube has a side length s of 7 centimeters. The expression 6s2 gives the surface area of the cube and the expression s3 gives t

JulijaS [17]

Answer:

Area = 294 cm^2

Volume = 343 cm^3

Step-by-step explanation:

Simply plug in s = 7 into the given equations.

$6s^{2} = 6*7^{2} = 294 cm^{2}$

$s^{3} = 7^{3} = 343 cm^{3}$

8 0

2 years ago

The youngest child in a family is 6 years old. The oldest

levacccp [35]

If the youngest is 6 and the oldest is 35 then the range equals 6 to 35.

7 0

3 years ago

Read 2 more answers

Example of Adjacent angles

mote1985 [20]

Adjacent angles are two angles that have a common vertex and a common side.
hope this helps

6 0

3 years ago

Find a parabola with equation y = ax2 + bx + c that has slope 5 at x = 1, slope −11 at x = −1, and passes through the point (2,

azamat

By "slope" I assume you mean slope of the tangent line to the parabola.

For any given value of x, the slope of the tangent to the parabola is equal to the derivative of y :

$y=ax^2+bx+c\implies y'=2ax+b$

The slope at x = 1 is 5:

$2a+b=5$

The slope at x = -1 is -11:

$-2a+b=-11$

We can already solve for a and b :

$\begin{cases}2a+b=5\\-2a+b=-11\end{cases}\implies 2b=-6\implies b=-3$

$2a-3=5\implies 2a=8\implies a=4$

Finally, the parabola passes through the point (2, 18); that is, the quadratic takes on a value of 18 when x = 2:

$4a+2b+c=18\implies2(2a+b)+c=10+c=18\implies c=8$

So the parabola has equation

$\boxed{y=4x^2-3x+8}$

6 0

3 years ago