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4 years ago

13

HELP!!

1 answer:

kobusy [5.1K]4 years ago

5 0

<span>f(x)=x^2+2x−24
x intercept is where y=0 let f(x)=y
</span><span>x^2+2x−24=0
(x+6)(x-4) ,x=-6, x=4

2)

</span><span>f(x)=x^2+17x+72
</span>x^2+17x+72 =0
<span>
(x+8)(x+9) x= - 8,- 9

3)
</span>f(x)=x^2+6x+11<span>
x=-3 minimum</span>

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The aspect ratio (the ratio of screen width to

stira [4]

Answer:

$Width = 36in$

$Size = 42.02$

Step-by-step explanation:

Given

$x \to width$

$y \to height$

$x : y = 16 : 9$

Required

The size of $screen$ of height $20,6in$

First, we calculate the width using the following equivalent ratios

$16: 9 = x : 20.6$

Express as fraction

$\frac{16}{ 9} = \frac{x }{ 20.6}$

Solve for x

$x = 20.6 * \frac{16}{ 9}$

$x = 36.62$

Hence:

$Width = 36in$ --- approximated

So, we have:

$x = 36.62$

$y =20.6$

The size (diagonal) is then calculated using:

$Size = \sqrt{x^2 + y^2$

$Size = \sqrt{36.62^2 + 20.6^2$

$Size = \sqrt{1765.3844$

$Size = 42.02$

$Size =42in$ --- approximated

8 0

3 years ago

A and B are vertical angles. If A = 4x - 10 and B = 6x - 30, find mA.

Andru [333]

<span>vertical angles
m<A = m<B
so
</span>4x - 10 = <span>6x - 30
6x - 4x = -10 + 30
2x = 20
x = 10

m<A = </span><span>4x - 10
</span>m<A = 4(10) - 10
m<A = 40 - 10
m<A = 30<span>

</span>

5 0

3 years ago

Read 2 more answers

What is<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B3%7D%20%20%5Ctimes%20%20-%2011%20%5C%5C%20" id="TexFormula1" ti

Ludmilka [50]

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4 0

4 years ago

Robert traveled 80 miles per hour. What equation shows the relationship between distance traveled (d), speed (s), and time taken

Evgen [1.6K]

Answer:

$80 = \frac{d}{t}$
d=80t
$t = \frac{d}{80}$

Step-by-step explanation:

The relationship between distance traveled (d), speed (s), and time taken (t) can be represented the following expressions:

$s = \frac{d}{t}$
d = st
$t = \frac{d}{s}$

Using any of these expressions you can show the relationship. Substitute s = 80 for the speed.

$80 = \frac{d}{t}$
d=80t
$t = \frac{d}{80}$

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4 years ago

Find the sales tax amount. purchase price = $121.65; tax rate = 11%

PolarNik [594]

You know 11% as decimal is 0.11 so you multiply 0.11 and $121.65 which is 13.38 so c is the correct answer rounded to the nearest hundredth

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3 years ago