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2 years ago

18 1/4 ÷ 8? Will give brainliest

Mathematics

2 answers:

Vesna [10]2 years ago

8 0

Answer:

9/16 i think this is right

Step-by-step explanation:

tigry1 [53]2 years ago

7 0

Answer:

9/16

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The real numbers $x$ and $y$ are such that \begin{align*} x + y &= 4, \\ x^2 + y^2 &= 22, \\ x^4 &= y^4 - 176 \sqrt{

tamaranim1 [39]

You get everything you need from factoring the last expression:

$x^4-y^4=-176\sqrt7$

The left side is a difference of squares, and we get another difference of squares upon factoring. We end up with

$x^4-y^4=(x^2-y^2)(x^2+y^2)=(x-y)(x+y)(x^2+y^2)$

Plug in everything you know and solve for $x-y$ :

$-176\sqrt7=(x-y)\cdot4\cdot22\implies x-y=\boxed{-2\sqrt7}$

4 0

3 years ago

Read 2 more answers

Which is true regarding the system of equations?<br><br> x minus 4 y = 1. 5 x minus 20 y = 4.

goldfiish [28.3K]

Answer:

No solution

Step-by-step explanation:

x - 4y = 1 --> (1)

5x - 20y = 4 --> (2)

y = (¼)x - ¼ --> (1)

y = (¼)x - ⅕ --> (2)

Since these are 2 parallel lines with different y-intercepts, they will never meet

3 0

2 years ago

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The height of the tunnel at the center is 35ft, and the vertical clearance must be 21 ft at a point of 8ft from the center. Find

Zinaida [17]

Answer:

y=-0.215x^2+35

Step by Step:

Let, $h=0$ , $k=35$ , $x=8$ , $y=21$

We know that, the general equation of the parabola.

$y-k = a(x-h)^2$

$\Rightarrow y=a(x-h)^2+k .........(i)$

Substitute the value of $h, k, x, y$ in equation $(i)$ and find the value of $a.$

$21=a(8-0)^2+35$

$\Rightarrow 21=a\times 8^2+35$

$\Rightarrow 21=64a+35$

$\Rightarrow 64a=21-35$

$\Rightarrow 64a=-14$

$\Rightarrow a=\frac{-14}{65}$

$\Rightarrow a=-0.215$

Hence, the equation of the parabola is:

$y=-0.215x^2+35$

8 0

2 years ago

Agata [3.3K]

Using the mean concept, it is found that the mean difference between the call times and the company's average call time is given by:

C. 0.4

The <em>mean </em>of a data-set is given by the <u>sum of all observations in the data-set divided by the number of observations</u>.

In this problem:

The four observations are the differences between the time of each phone call and the average time.

They are: {-2.32, -1.55, 4.79, 0.68}

Hence, the mean difference is:

$M = \frac{-2.32 - 1.55 + 4.79 + 0.68}{4} = 0.4$

Hence, option C is correct.

To learn more about the mean concept, you can take a look at brainly.com/question/13451786

6 0

2 years ago

What's a² + 2a + 2 - a² + 5a?

Eddi Din [679]

Answer:

7 0

2 years ago

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18 1/4 ÷ 8? Will give brainliest​

18 1/4 ÷ 8? Will give brainliest