All categories

3 years ago

The mean of three number is 15. if 2 of the numbers are 18 and 16 what is the third number

Mathematics

1 answer:

tino4ka555 [31]3 years ago

8 0

Answer:

The third number is 11

Step-by-step explanation:

First, you multiply 15 by 3 to get the sum(45) and then you add 18 and 16 to get 34. Lastly, you will minus 45 and 34 and your answer will be 11.

You might be interested in

What is C in -43=-5c+4(2c+7)

elixir [45]

Answer: C = - 71/3 or -23.6 or -23 2/3 All the same

Step-by-step explanation:

4 0

3 years ago

Determine whether each point lies on the graph of the equation.

sladkih [1.3K]

Points 2,2
2=square root of 6-2
2=square root of 4
2=2
Yes point lies on graph

Points 6,0
0=square root of 6-6
0=0
Yes point lies on graph

3 0

3 years ago

On a number line the directed line segment from Q to S has endpoints Q at -14 and S at 2. Point R partitions the directed line s

liq [111]

Answer:

Step-by-step explanation:

The distance from Q to S is 2 - (-14), or 16.

We start at point Q. Note how 3 and 5 add up to 8, which allows us to write:

R = Q + (3/8)(16), or R = -14 + 6, or R = -8.

From R to S it is (5/8)(16), or 10 units.

The directed line segment is partitioned into segments of lengths 6 and 10, whose combined length is 16, as expected.

8 0

4 years ago

Read 2 more answers

Y=x+1 and y=-x-3 in graphing,Substitution,and elemination

marysya [2.9K]

$\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right\\\\GRAPHING\ \text{(look at the picture)}\\\\y=x+1\\for\ x=0\to y=0+1=0\to(0,\ 1)\\for\ x=-1\to y=-1+1=0\to(-1,\ 0)\\\\y=-x-3\\for\ x=0\to y=-0-3=-3\to(0,\ -3)\\for\ x=-3\to y=-(-3)-3=0\to(-3,\ 0)\\\\Solution:\ (-2,\ -1)$

$SUBSTITUTION\\\\\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right\\\\\text{substitute}\ y=-x-3\ \text{to the first equation}\\\\-x-3=x+1\ \ \ \ |+3\\-x=x+4\ \ \ \ |-x\\-2x=4\ \ \ \ |:(-2)\\x=-2\\\\\text{substitute the value of x to the second equation}\\\\y=-(-2)-3=2-3=-1\\\\Solution:\ (-2,\ -1)$

$ELIMINATION\\\\\underline{+\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right}\ \ \ |\text{add both sides of the equations}\\.\ \ \ \ 2y=-2\ \ \ \ |:2\\.\ \ \ \ \ \ y=-1\\\\\text{put the value of y to the first equation}\\\\-1=x+1\ \ \ \ |-1\\x=-2\\\\Solution:\ (-2,\ -1)$

5 0

3 years ago

Re-write the quadratic function below in Standard Form<br> y = 9(x - 1)(x + 3)

Maksim231197 [3]

Y=9(x^2+3x-x-3)
y=9(x^2+2x-3)
y=9x^2+18x-27

4 0

3 years ago

The mean of three number is 15. if 2 of the numbers are 18 and 16 what is the third number​

The mean of three number is 15. if 2 of the numbers are 18 and 16 what is the third number