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2 years ago

How many people scored below 80? 21 18 11 12

Mathematics

1 answer:

Airida [17]2 years ago

7 0

The answer would be 11

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ANSWER ALL QUESTIONS

ra1l [238]

Answer:

1) 4 members have both pencil's and eraser's

i dont know others sry frnd

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2 years ago

Help!<br> Change 2/5<br> to a percent.

nalin [4]

Answer:

40%

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Question 8

sasho [114]

we are given

system of equations

First equation is

$3x-2y=31$

Second equation is

$3x+2y=-1$

now, we can find augmented matrix

$A=\begin{pmatrix}3&-2&31\\ 3&2&-1\end{pmatrix}$

now, we can change it into reduced row echelon form

step-1: multiply the 1st row by 1/3

$A=\begin{pmatrix}1&-2/3&31/3\\ 3&2&-1\end{pmatrix}$

step-2:add -3 times the 1st row to the 2nd row

$A=\begin{pmatrix}1&-2/3&31/3\\ 0&4&-32\end{pmatrix}$

step-3:multiply the 2nd row by 1/4

$A=\begin{pmatrix}1&-2/3&31/3\\ 0&1&-8\end{pmatrix}$

step-4: add 2/3 times the 2nd row to the 1st row

$A=\begin{pmatrix}1&0&5\\ 0&1&-8\end{pmatrix}$

so, we get

$x=5,y=-8$

Answer is (5,-8)

6 0

3 years ago

Read 2 more answers

Write a compound inequality to represent all of the numbers between -4 and 6.

Oksana_A [137]

-4<n<6
...........

.........///

6 0

3 years ago

8 x 4 = ( y x 7 ) - ( y x 3 )<br><br> What is y?

ASHA 777 [7]

8x4=32
32=(yx7)-(yx3)
(yx7)=7y
(yx3)=3y
32=7y-3y
7y and 3y are like terms so you subtract them
=4y
32=4y
then divided 4y by 4 (to get y on its own) this cancels out if you ÷ 4y on one side of the equation you have to divide on the other side to make it balanced 32÷4=8
y=8

4 0

2 years ago