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3 years ago

I need help please!

Mathematics

1 answer:

Effectus [21]3 years ago

4 0

Answer:

-x^2 + 6x - 19

Step-by-step explanation:

2x^2 + 5x - 10 -(3x^2 - x + 9)

=2x^2 + 5x - 10 -3x^2 + x - 9

=-x^2 + 6x - 19

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Write the multiplicative inverse of 1.725. Enter your answer as a fraction in its simplest form. The multiplicative inverse of 1

Katarina [22]

Multiplicative inverse is a number which when multiplied with the current number, the answer unit (that is, 1).

Now,
1.725 = 1725/1000 = 69/40

Inverting this and multiplying it with the results yields 1. That is,

69/40*40/69 = 1
Therefore, the multiplicative inverse of 1.725 is 40/69

8 0

3 years ago

Plzzz help need it right nowww.....

Hunter-Best [27]

$2x-5= - 20$

$
2x=-20+5
 
$ $Add \ 5 \ to \ both \ sides
$

$2x=-15

 
$

$x=- \dfrac{15}{2}$ $Divide \ both \ sides \ by \ 2$

5 0

3 years ago

What is the rate of change of the water level , in feet per hour

miskamm [114]

A; rate of change is the same as slope, so, using the slope formula, $m= \frac{y_{2} - y\1_{1} }{ x_{2} - x_{1} }$ , where $m$ is the slope and $x_{1}$ , $x_{2}$ , $y_{1}$ , and $y_{2}$ are the $x$ and $y$ values.

Plug in $2$ points for $x$ and $y$ , water level being the $y$ and time being the $x$ since we're looking for the answer in ft/hr-- you can choose any two, but from the same row.

$m= \frac{ 30-50}{4-0}$
$m= \frac{-20}{4}$
$m= \frac{-5}{1}$
$m= -5$ ft/hr

4 0

3 years ago

18= r/2 Find out what are is

Roman55 [17]

18=r/2
Multiply by 2 on each side,
36=r
r=36
Hope this helps.

6 0

4 years ago

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What's 2+2=...........?

mr Goodwill [35]

The answer is 4 (four)

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3 years ago

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