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2 years ago

And it's elimination using addition and subtraction x-y=1 x+y=3

2 answers:

7 0

Get one x+y=3 to y=x+3 and plug it into x-y=1 and you get x-(x+3)=1. Destitute the x and solve. Once you get what x equals plug it to to either equation for the value of x and solve for y

nirvana33 [79]2 years ago

6 0

X-y=1. ....> x=1+y
(1+y)+y =3
1+y+y =3
1+2y =3
2y=3-1=2 ....>y =2/2=1
Y=1
X-y=1
X-1=1. ....>x=1+1 =2

X=2. Y=1

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Suppose that a family wants to start a college fund for their child. If you invest in an account that pays 5.5% and want the fun

vazorg [7]

The answer is 17040.34
Check the annuity due formula

7 0

2 years ago

Insert grouping symbols in 5 x 2 + 8 - 4 - 2 so that its value is 15

Arlecino [84]

5×2+8-4+1=15
cause
5×2=10
10+8=18
18-4=14
14+1=15

5 0

3 years ago

Cody's rent is increasing by $51 per month starting next year. That is an increase of 15% from his current monthly rent. Let r r

Inessa05 [86]

Answer:

$r = 43.35$

Step-by-step explanation:

Given

$Current\ Rent = r$

$Increment = 15\%$

$New\ Rent = \$51$

Required

Determine the value of r

The value of r can be set up percentage increase formula as follows:

$\%Increment = \frac{New\ Rent - Current\ Rent}{Current\ Rent}$

Substitute values in the above equation

$15\% = \frac{51 - r}{51}$

Cross Multiply

$51 - r = 15\% * 51$

Convert percentage to decimal

$51 - r = 0.15 * 51$

$51 - r = 7.65$

And the value of $r\ is\ calculated\ using:$

$r = 51 -7.65$

$r = 43.35$

Hence, Cody's current rent is $43.35 monthly

8 0

2 years ago

A negative linear relationship implies that larger values of one variable will result in smaller values in the second variable.

solong [7]

Answer:

True

Step-by-step explanation:

The negative linear relationship means that there is inverse relationship between two variables. It means that if the independent variable increases the dependent variable decreases and if the independent decreases the dependent variable increases. It means that due to larger values of independent variable there occurs the smaller values for dependent variable.

3 0

2 years ago

Kerille is reading a book at the rate of 4.5 pages per minute. What ordered pair on a graph of his reading rate would represent

viva [34]

This is a linear equation y = mx, where:
m= slope or reading rate:
x = the number of minutes
y = the number of pages read.

So the equation becomes: y = 4.5.x
How many minutes it will take to read 90 pages (y):
90 = 4.5.x or x = 90/4.5 and x = 20 minutes
So the ordered pair will be (20,90)

5 0

2 years ago