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4 years ago

5

Mike can take the field in 12 hours and his brother Phil can plow it in 15 hours. how long will it take them to plow it if they

use two plows and work together???

1 answer:

evablogger [386]4 years ago

6 0

I think this is correct if not sorry

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shelia has 5 times more markers then dave and together they have 18 markers how many markers does sheli have?

ryzh [129]

She has 90 markers because 18 times 5 is 90

6 0

3 years ago

4 1/3ft 12 ft 9 ft what is the volume

mina [271]

Just multiply all them together for volume, 468 ft ^3

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3 years ago

Write a quadratic function, in standard form, that fits the set of points. Solve it as a system of three equations. (-4, 9), (0,

Tresset [83]

Answer:

$\boxed{y=2x^2+4x-7}$

Step-by-step explanation:

Let the quadratic function be

$y=ax^2+bx+c$

We substitute $(-4,9)$ into the equation to obtain;

$9=a(-4)^2+b(-4)+c$

$\Rightarrow 9=16a-4b+c---(1)$

We substitute $(0,-7)$ to obtain;

$-7=a(0)^2+b(0)^2+c$

$\Rightarrow c=-7---(2)$

We finally substitute $(1,-1)$ to obtain;

$-1=a(1)^2+b(1)^2+c$

$\Rightarrow -1=a+b+c---(3)$

We put equation (2) into equation (1) to get;

$9=16a-4b-7$

$16a-4b=16$

$\Rightarrow 4a-b=4---(4)$

$\Rightarrow -1=a+b-7$

$\Rightarrow a+b=6---(5)$

We add equation (4) and (5) to get;

$4a+a=6+4$

$\Rightarrow 5a=10$

$\Rightarrow a=2$

We put $a=2$ into equation (5) to get;

$2+b=6$

$\Rightarrow b=6-2$

$\Rightarrow b=4$

The reqiured quadratic function is

$y=2x^2+4x-7$

7 0

3 years ago

PLEASE HELP!! DUE SOON!!

ryzh [129]

Answer:

Do you still need help??

Step-by-step explanation:

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3 years ago

6 divided by 9.51 plz help me

astra-53 [7]

Answer:

0.63091482649

Step-by-step explanation:

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4 years ago