Ask question

Ask question

All categories

My name is Ann [436]

3 years ago

13

2x+8y=54 x+9y=67 Solve the system by subtitution

1 answer:

Kisachek [45]3 years ago

3 0

Step-by-step explanation:

2x +8y = 54

x + 9y = 67

x = 67 - 9y

2(67-9y) + 8y = 54

434 - 18y + 8y = 54

434 - 10y = 54

10y = 54 - 434

10y = -380

y = -38

You might be interested in

Three fourths of a class brought bundles of old papers to school. If 40 students were in class, how many students brought papers

Vaselesa [24]

Answer:

300 students

Step-by-step explanation:

Hope this answer helps you :)

Have a great day

Mark brainliest

8 0

3 years ago

Given that these simultaneous equations

Tatiana [17]

The value of k is $(3\sqrt{ 10})/2$

<h3>How to solve the simultaneous equation?</h3>

Given:

x-y=k.............(eq i)

2x²+y²-15..............(eq ii)

We would make y the subject formula in eq ii

2x²+y²-15= 0

2x² + y²= 15

y²= 15-2x²

y= $\sqrt{15-2x^2}$ ...........(eq iii)

Substitute the value of y into eq i

x-( $\sqrt{15-2x^2}$ = k

x- ( $\sqrt{15} - 2x$ = k

k= $(3\sqrt{ 10})/2$

Read more about simultaneous equations here:

brainly.com/question/16863577

#SPJ1

3 0

1 year ago

if the measure of the third angle of the triangle is 20 more than three times the measure of either of the other two angles, fin

valentina_108 [34]

You should multiply 20 time 8 to get your answer

5 0

3 years ago

This one I can’t figure out! It has fractions too..

viva [34]

Answer:

3x+ 5 1/3

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

A carpenter charges a one-time fee of $50 plus $35 for each hour on the job. If n is the number of hours on the job and c is the

Mamont248 [21]

I think it's A because 35n is independent from the 50.

3 0

3 years ago