Old joe is 100 years old. If is brother is 5%older than joe, how old is his older brother

Someone please help me, i will gift an amazon gift card of $10 if you get this right!

inna [77]

1/2/3 that would be awesomley great

4 0

3 years ago

HELP!!!!!!!!!!!!!!!!!!!

snow_tiger [21]

Answer: 13/12

Step-by-step explanation:

Common denominator:12

9/12 plus 4/12 equals 13/12 equals 1 1/12

6 0

3 years ago

Read 2 more answers

For what side length(s) is the area of an equilateral triangle equal to 30 cm?? Only enter the number, in centimeters, rounded t

xenn [34]

Answer: The sides length are 8.32 cm

Step-by-step explanation:

An equilateral triangle has all his sides of the same lenght, so we assume that the triangle has an L lenght in his sides.

The area of a triangle is $Area = \frac{base * height}{2}$ where the base is L, the Area is 30 and an unknown height.

To determine the height, we cut the triangle in half and take one side. By simetry, one side has a base of $\frac{L}{2}$ , a hypotenuse of L and a the unknown height.

Then we apply the Pythagoras theorem, this states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides, or, $hypotenuse = \sqrt{c^{2} + c^{2} }$ Where one c is $\frac{L}{2}$ and the other is the height.

Then we find one of the c of the equation wich will be the height.

$height = \sqrt{hypotenuse^{2}-base^{2} }$

$height = \sqrt{ L^{2} -\frac{L}{4} ^{2}}\\height = \sqrt{\frac{ 3L^{2}}{4} } \\\\height = \frac{\sqrt{3}L }{2}$

Finally, we use the triangle area mentioned before an find the value of L.

$30 = \frac{L*\frac{\sqrt{3}L }{2} }{2} \\\\L = \sqrt{\frac{120}{\sqrt{3} } } \\\\L = 8.32 cm$

6 0

3 years ago

I found the answer 5 squares but how do I round it to the nearest tenth

GuDViN [60]

$s^2=1^2+2^2\\s^2=1+4\\s^2=5\\s=\sqrt5$

s²=5 , so we look for the nearest squares, one less than 5 and the other greater.

First it would be perfect squares, which means 4=2² and 9=3²

4 < 5 < 9 so 2 <√5 < 3

now we'll do the same with the numbers with tenths, but to speed up we don't check them all. We do estimation for the square root knowing that it must be between 2 and 3

5 is close to 4 then 9, so I estimate 2.3 for its square root

(2.3)² = 5.29 - it is close but more then 5 so I look for less number then 2.3

(2.2)² = 4.84 - it is also close and less then 5 so:

4.84 < 5 < 5.29 therefore 2.2 < √5 < 2.3 and:

5 - 4.84 = 0.16 ; 5.29 - 5 = 0.29

0.16 < 0.29 means the √5 is closer to 2.2 then 2.3

So the √5 rounded to the nearest tenth is 2.2

Of course is much easier if you can use the calculator. Then you have:

√5 = 2.2360679... ≈ 2.2 {because 3<5}

:)

3 0

3 years ago

1.When paying down debt, it is best to _____. (1 point) pay as much as possible toward the debt at the beginning of the month pa

Kitty [74]

1) The best way to pay off a debt is to pay as much as you can at the beginning of the month in order to decrease the interests you would pay on the principal during that month.
Putting money in a saving account, although it allows you to earn money, does not decrease the interest on the principal, resulting in a loss of money.
Therefore, the correct answer is A) pay as much as possible toward the debt at the beginning of the month.

2) You get into debt when you buy something you can not afford at the moment of the purchase.
By definition, credit cards and student loans consider a debt.
Between a house and a car, it is more logical that you have the money to buy a car rather that to buy a house, which is usually much more expensive.
Therefore, the correct anser is C) purchase of a car.

7 0

3 years ago