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3 years ago

Anyone know these questions? I need help,please.

Mathematics

1 answer:

dexar [7]3 years ago

3 0

1) there were 32 bales added

2) 8 hours

3) 74 cards

4) 11 packs

5) $57

6) ummm...$3?

7) began with 12

8) $5 per candy bar

9) 44 students on each bus

10) $77 spent on baseball gear

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Which exponential function has an initial value of 2?

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A) f(x) = 2(3^x) is the answer

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6.01 as a improper fraction

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601/100

Step-by-step explanation:

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Solve the equation 2x^2+8x-1=o by completing the square. Give your answer to 2 decimal places

VMariaS [17]

Answer:

$\boxed{\sf \ \ \ x=-4.12 \ or \ x=0.12 \ \ \ }$

Step-by-step explanation:

Hello,

step 1 - we divide all terms by 2

$2x^2+8x-1=0 x^2+4x-\dfrac{1}{2}=0$

step 2 - we complete the square

we can notice that

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

$2x^2+8x-1=0 x^2+4x-\dfrac{1}{2}=0(x+2)^2-4-\dfrac{1}{2}=0\\$

step 3 - we move the constant term to the right of the equation

$(x+2)^2-4-\dfrac{1}{2}=0\\\\ (x+2)^2=4+\dfrac{1}{2}=\dfrac{8+1}{2}=\dfrac{9}{2}$

step 4 - we take the square root on both sides of the equation

$x+2=\sqrt{\dfrac{9}{2}}$

$x+2=-\sqrt{\dfrac{9}{2}}$

step 5 - we subtract 2 from both sides

$x+2=\sqrt{\dfrac{9}{2}} x=\dfrac{3}{\sqrt{2}}-2=0.12132...$

$x+2=-\sqrt{\dfrac{9}{2}} x=-\dfrac{3}{\sqrt{2}}-2=-4.12132...$

so the solutions are 0.12 and -4.12

hope this helps

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3 years ago

A long year end status report for work is 78 pages long. You need to print 12 copies for a

Schach [20]

U got to divide 78 and 12 then

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3 years ago

Select all angle measures for which cosΘ=1/2. –120° –60° 120° 600° 660°

Yuliya22 [10]

Answer:

The general solution to cos(theta) = 1/2 is 2k π ± π /3, translated to degrees, the solution is

360k ± 60 degrees, where k is an integer.

For k=0, we have solutions 0 ± 60, or {-60, +60}

For k=1, we have solutions 360 ± 60, or {300, 420}

For k=2, we have solutions 720 ± 60, or {660, 780}

This is sufficient to cover the range of the answer choices, giving the angle measures for which cos(theta)=1/2 as {-60,660}

Source:

Read more on Brainly.com - brainly.com/question/10610670#readmore

Step-by-step explanation:

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