This can be solved by using the 30 60 90 triangle. The 30-60 side is equal to 2x, here it is 2x=18. The 60-90 side is equal to x. So this side is 18/2=9. The 30-90 side is by the way equal to the root of x, so here the root of 18

4 0

2 years ago

PLEASE HELP WILL GIVE BRAINLIEST!

storchak [24]

Answer:

it 20 chews 5 over 20 chews 10

= 20! / (20-5)! times 5! over 20! / (20-10)! times 10!

=15504/ 184756= .08 or 8%

Step-by-step explanation:

have a good day/night

may i please have a branllliest

sorry if wrong :(

3 0

3 years ago

Use the echelon method to solve the following system of two equations in two unknowns. Check your answer. x+y=17 amd 9x-y=73

Komok [63]

Answer:

y = 8

x = 9

Step-by-step explanation:

given equation,

x + y = 17 ........(1)

9 x - y = 73...........(2)

writing in matrix form

A X = B

$\begin{bmatrix}1 &1 \\ 9 &-1 \end{bmatrix} \begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}17\\73 \end{bmatrix}$

using augamented matrix A|B

$\begin{bmatrix}1 &1& 17\\ 9 & -1 & 73\end{bmatrix}$

using row transformation

R₂ = R₂ - 9 R₁

$\begin{bmatrix}1 &1& 17\\ 0 & -10 & -80\end{bmatrix}$

now,

$\begin{bmatrix}1 &1 \\ 0 &-10 \end{bmatrix} \begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}17\\-80 \end{bmatrix}$

now

-10 y = -80

y = 8

and

x + y = 17

x = 17 -8

x =9

7 0

3 years ago

What are the intercepts with y=-3x+ 12

arsen [322]

It intercepts (4, 0) and (0, 12)

4 0

3 years ago