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2 years ago

14

Need help asap please

1 answer:

cestrela7 [59]2 years ago

6 0

Answer:

9:49 is the answer because question say ratio is square of small and big

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A light bulb consumes 15300 watt-hours in 4 days and 6 hours . How many watt-hours does it consume per day?

Kay [80]

Answer:

3600 per 24 hour period or 1 day.

Step-by-step explanation:

24 x 15300/(4 x 24+6)=3600

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3 years ago

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What is the equation of the line, in slope-intercept form, that contains the points (−1, 4) and (2, −5)?

Dafna11 [192]

$The\ slope-point\ form:y-y_1=m(x-x_1)\\\\m=\dfrac{y_2-y_1}{x_2-x_1}\\\\The\ slope-intercept\ form:y=mx+b\\--------------------\\(-1;\ 4)\to x_1=-1\ and\ y_1=4\\(2;-5)\to x_2=2\ and\ y_2=-5\\\\m=\dfrac{-5-4}{2-(-1)}=\dfrac{-9}{3}=-3\\\\y-4=-3(x-(-1))\\y-4=-3x-3\\\\\boxed{y=-3x+1}$

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4 years ago

Do the ratios 10/8 and 16/20 form a proportion<br><br> Yes or no?

ziro4ka [17]

Answer:

No. Reduce 10/8 by dividing by 2. 10/8= 5, 8/2= 4. 10/8= 5/4. Reduce 16/20 by dividing by 4. 16/4= 4 , 20/4= 5. 16/20= 4/5.

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3 years ago

Which line is the intersection of two of the planes

Mashutka [201]

Answer:

ㅇㅅㅇ흐ㅜㄴㅅ

Step-by-step explanation:

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3 years ago

Solve by completing a square r^2-8r+9

Tanzania [10]

Solving $r^2-8r+9$ by completing a square gives $(r+4)^2-7$

Step-by-step explanation:

We need to solve the equation $r^2-8r+9$ by completing a square

The completing a square method requires: $a^2\pm 2ab +b^2=(a\pm b)^2$

Solving:

$r^2-8r+9\\=(r)^2-2(r)(?)+(?)^2+9$

We need to add and subtract (4)^2=16 to make the equation a complete square

$=(r)^2-2(r)(4)+(4)^2-(4)^2+9\\=(r)^2-2(r)(4)+(4)^2-16+9\\=(r)^2-2(r)(4)+(4)^2-7\\=(r+4)^2-7$

So, Solving $r^2-8r+9$ by completing a square gives $(r+4)^2-7$

Keywords: Solve by completing a square

Learn more about Solve by completing a square at:

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7 0

3 years ago