Ask question

Ask question

All categories

igor_vitrenko [27]

3 years ago

8

In order to solve the system of equation {x-3y=2 {2x+y=11 using the elimination method which of the following step could be used

?

1 answer:

Vadim26 [7]3 years ago

3 0

X - 3y =2
2x + y= 11 | *3

x - 3 y = 2
6x + 3y = 33
-----------------
7x = 35
x= 35:7
x=5

2x+y=11
2*5 + y = 11
10 + y = 11
y= 11 -10
y= 1

You might be interested in

What is the sum of the series? ∑ k=1 4 3 k 2

AleksAgata [21]

I got this on the calculator.

7 0

3 years ago

Read 2 more answers

At the start of the year, 15 chameleons were introduced into a zoo. The population of chameleons is expected to grow at a rate o

bearhunter [10]

Answer:

option-B

Step-by-step explanation:

We are given

At the start of the year, 15 chameleons were introduced into a zoo

so, $P_0=15$

The population of chameleons is expected to grow at a rate of 41.42% every year

so, r=0.4142

and x represents the number of years since the chameleons were introduced into the zoo

now, we can set equation to find total population

and we get

$P(x)=P_0(1+r)^x$

now, we can plug values

$P(x)=15(1+0.4142)^x$

$P(x)=15(1.4142)^x$

Average rate of change between 2 years and 4 years:

we can use formula

$A_1=\frac{P(4)-P(2)}{4-2}$

now, we can plug values

$A_1=\frac{15(1.4142)^{4}-15(1.4142)^{2}}{4-2}$

$A_1=14.99914$

Average rate of change between 4 years and 6 years:

we can use formula

$A_2=\frac{P(6)-P(4)}{6-4}$

now, we can plug values

$A_2=\frac{15(1.4142)^{6}-15(1.4142)^{4}}{6-4}$

$A_2=29.99770$

Average rate of change between 6 years and 8 years:

we can use formula

$A_3=\frac{P(8)-P(6)}{8-6}$

now, we can plug values

$A_3=\frac{15(1.4142)^{8}-15(1.4142)^{6}}{8-6}$

$A_3=59.99425$

now, we will check each options

option-A:

we can see that

$A_3-A_2=30$

$A_3-A_2=30$

So, this is FALSE

option-B:

$A_1=\frac{1}{2}A_2$

So, this is TRUE

option-C:

This is FALSE

option-D:

we got

$A_1=\frac{1}{2}A_2$

so, this is FALSE

5 0

3 years ago

Hey circular plot of land has a diameter of 14 yards what is the area of the land use 3.14 for pie

vagabundo [1.1K]

Answer:

153.86 yards²

Step-by-step explanation:

A(Circle) = πr² where r = radius.

r = d/2 where r = radius and d = diameter.

r = 14/2 = 7 yards.

(3.14)(7)² = (3.14)(49) = 153.86 yards²

3 0

3 years ago

Read 2 more answers

How do i factor 2y^2+y-10

Leokris [45]

2y^2+y-10
(2y+5)(y-2)

4 0

3 years ago

Read 2 more answers

You mix soda water, fruit punch concentrate, and ginger ale in a ratio of 1:2:5 to make fruit punch. How many pints of each ingr

andriy [413]

I don’t understand sorry

7 0

3 years ago