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3 years ago

2.5x + 5 ≥ 15 I really don't get these

Mathematics

2 answers:

Andrew [12]3 years ago

6 0

Answer:

If we are solving for x, then the answer is x = 4

Step-by-step explanation:

move 5 to other side

2.5x <u>+ 5</u> ≥ 15 <u>- 5</u>

2.5x = 10

Get rid of 2.5

x = 4

Hope this helps!! Please mark Brainliest!!!

SOVA2 [1]3 years ago

6 0

Step-by-step explanation:

The equality means that 2.5x+5 is bigger than or equal to 15.

If you want to find x,

2.5x + 5 ≥ 15

2.5x ≥ 10

x ≥ 4

Therefore x is bigger than or equal to 4.

(Remember x may not equal to 4 since it's an equality. So write x ≥ 4, not x =4.)

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natima [27]

Answer:

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8 0

3 years ago

The outside temperature was -4°F I the morning and 13 F in the afternoon by how much did the temperature increase?

yulyashka [42]

11 degrees. -4+13=11

5 0

3 years ago

Lori is 6 years

Delicious77 [7]

Answer:

12:6

Step-by-step explanation:

6 times 2 because Lori is six and her cousin is twice her age (hope it helps)

7 0

3 years ago

lilavasa [31]

The count of the equilateral triangle is an illustration of areas

There are 150 small equilateral triangles in the regular hexagon

<h3>How to determine the number of equilateral triangle </h3>

The side length of the hexagon is given as:

L = 5

The area of the hexagon is calculated as:

$A = \frac{3\sqrt 3}{2}L^2$

This gives

$A = \frac{3\sqrt 3}{2}* 5^2$

$A = \frac{75\sqrt 3}{2}$

The side length of the equilateral triangle is

l = 1

The area of the triangle is calculated as:

$a = \frac{\sqrt 3}{4}l^2$

So, we have:

$a = \frac{\sqrt 3}{4}*1^2$

$a = \frac{\sqrt 3}{4}$

The number of equilateral triangles in the regular hexagon is then calculated as:

$n = \frac Aa$

This gives

$n = \frac{75\sqrt 3}{2} \div \frac{\sqrt 3}4$

So, we have:

$n = \frac{75}{2} \div \frac{1}4$

Rewrite as:

$n = \frac{75}{2} *\frac{4}1$

$n = 150$

Hence, there are 150 small equilateral triangles in the regular hexagon

Read more about areas at:

brainly.com/question/24487155

4 0

3 years ago

a piece of luggage sells for $225.00 it is on sale this week for $195.00 what is the percent decrease to the nearest whole perce

viktelen [127]

Answer: 13%

Step-by-step explanation:

Given : A piece of luggage sells for $225.00 it is on sale this week for $195.00 .

Decrease in price = $225.00-$195.00= $30.00

Formula to find the percent decrease :-

$\dfrac{\text{Decrease in price}}{\text{Previous price}}\times100\\\\=\dfrac{30}{225}\times100=13.3333333333\approx13\%\ \ [\text{Rounded to the nearest whole percent.}]$

Hence, the percent decrease = 13%

6 0

3 years ago