Ask question

Ask question

All categories

3 years ago

8

Solve the system using substitution 8x+9y=15 5x-2y=17

1 answer:

Otrada [13]3 years ago

8 0

$5x-2y=17\ \ \ \ |-5x\\-2y=-5x+17\ \ \ \ |:(-2)\\y=2.5x-8.5\\\\\text{substitute to the first equation}\\\\9x+9(2.5x-8.5)=17\ \ \ \ |\text{use distributive property}\\9x+22.5x-76.5=17\ \ \ \ |+76.5\\31.5x=93.5\ \ \ \ |:31,5\\x=3\\\\\text{substitute the value of x to the equation}\ y=2.5x-8.5\\\\y=2.5(3)-8.5=7.5-8.5=-1\\\\Answer:\ x=3,\ y=-1\to(3;\ -1)$

You might be interested in

Based on the model ân(11551155â,8989â) describing steerâ weights, what are the cutoff values for âa) the highestâ 10% of theâ we

cestrela7 [59]

I cant understand this

8 0

3 years ago

Which subset of the rational numbers best describes the dimension of a rectangle ?

Alinara [238K]

Either A or D I believe

6 0

3 years ago

the ratio of dogs to cats at a local animal shelter is 9:3 if there was a total of 33 cats at the shelter how many of them were

wel

So for every 9 dogs, there are 3 cats. So if I multiply 3 by 11, to get 33. I will also have to multiply 9 by 11.

8 0

3 years ago

Read 2 more answers

#2. If someone could help me please

alina1380 [7]

The answer is D if you combine like terms

5 0

3 years ago

What is the value of the underline digit?<br><br> 14.097

weqwewe [10]

Answer:14.097

Step-by-step explanation:

6 0

3 years ago