PLEASEEE HELP I WILL GIVE U BRAIN THING IF ITS CORRECT

Mathematics

1 answer:

never [62]3 years ago

3 0

Cant see photo sorry!!

You might be interested in

The average height of 4 children is (15h-3). Two more children join the group with heights of (10h+46) centimeters and (14h-16)

oksian1 [2.3K]

Answer: 123.5 centimeters

Step-by-step explanation:

Let sum of observations be S and number of observations be n.

Average A= $\frac{\text{S}}{\text{n}}$

The average height of 4 children is (15h-3)

$(15h-3)=\frac{S}{4}\\\Rightarrow\ S=4(15h-3)\\\Rightarrow\ S=60h-45$

Also, when two more children join the group with heights of (10h+46) centimeters and (14h-16) centimeters the sum of heights of 6 children will be

$S+(10h+46)+(14h-16)=60h-45+10h+46+14h-16=84h-107$

Now, Average height of 6 students= $\frac{84h-15}{6}$

At h=9

Average height of 6 students= $\frac{84(9)-15}{6}=\frac{741}{6}=123.5\ centimeters$

3 0

4 years ago

How many stones are needed to trade for 10bricks ?

lianna [129]

You need 10 logs for 1 brick. To get 10 bricks you need 100 logs. You are collecting stones and 1 stone gets you 4 logs. That means to get 100 logs you’ll need 25 stones. That indirectly means that 25 stones gets you 10 bricks.

6 0

3 years ago

How do i solve this

natima [27]

I think you are suppose to get "k" by itself, so you first multiply 2/5 to (k - 2)

-8 ≤ 2/5 (k - 2)

-8 ≤ 2/5k - 4/5

Next you add 4/5 on both sides

-8 + 4/5 ≤ 2/5k

Then you make the denominators the same in order to add them

-40/5 + 4/5 ≤ 2/5k

-36/5 ≤ 2/5k