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3 years ago

How much fencing does she need to buy

Mathematics

1 answer:

kati45 [8]3 years ago

4 0

Its is surprising that no one attempted this question for over a week.

As in all geometry problems, start with a diagram (shown).

Then we realize right away that AB=sqrt(8^2+2^2)=sqrt(68)=2sqrt(17)

BC=sqrt(4^2+1^2)=sqrt(17)

The perimeter is therefore twice the sum of AB+BC=2(2sqrt(17)+sqrt(17))

2(3sqrt(17))=6 sqrt(17) We can estimate sqrt(17)=4.125, so 6sqrt(17)=24.75 which is close enough to get the correct answer choice.

Have a good day.

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Decompose 8/12 in two ways with: <br> x/2 + x/2 = 8/12

LUCKY_DIMON [66]

$\frac{x}{2} + \frac{x}{2} = \frac{8}{12} \\\frac{2x}{2} = \frac{2}{3} \\x = \frac{2}{3}$
or
$\frac{x}{2} + \frac{x}{2} = \frac{8}{12} \\\frac{x}{2} + \frac{x}{2} = \frac{2}{3} \\\frac{\frac{2}{3}}{2} + \frac{\frac{2}{3}}{2} = \frac{2}{3} \\\frac{1}{3} + \frac{1}{3} = \frac{2}{3} \\\frac{2}{3} = \frac{2}{3}$

8 0

3 years ago

Janine has job offers at two companies. One company offers a starting salary of $28,000 with a raise of $3000 each year. The oth

Umnica [9.8K]

Answer:

8 years

Step-by-step explanation:

The first company's offer is $8000 lower, but the raises are $1000 higher each year. It will take 8000/1000 = 8 years for the salaries to be the same.

If you like, you can write an equation that will tell you the same thing.

28000 +3000y = 36000 +2000y

Subtract 28000+2000y from both sides:

3000y -2000y = 36000 -28000

1000y = 8000

y = 8000/1000 = 8

4 0

3 years ago

If 2/3 X ? = 1 what number goes in the box

Tatiana [17]

Answer:1/3?

Step-by-step explanation: sorry I don’t wanna take ur points just be more specific in the comments pls

7 0

3 years ago

Solve the equation using the zero product property -2x(5x-2)=0

anastassius [24]

Answer:

Step-by-step explanation:

Given

- 2x(5x - 2) = 0

Equate each factor to zero and solve for x

- 2x = 0 ⇒ x = 0

5x - 2 = 0 ⇒ 5x = 2 ⇒ x = $\frac{2}{5}$

Solutions are

x = 0, x = $\frac{2}{5}$

5 0

3 years ago

75+20 1X -40+13 X +76 + 3X -20 = 720 solve for x

hoa [83]

Thanks.

Answer is 37x=720-20+20-75-76+40=609

x=609/37= 16.459 Assuming all the numbers are the same as we can see it in the equation.

4 0

4 years ago