Ask question

Ask question

All categories

3 years ago

15

Linear system word problem

1 answer:

jeka57 [31]3 years ago

3 0

Drinks, x, and popcorn, y.
38.75 = 5x+2y
37.25 = 3x + 4y
Let's solve this using the elimination method
subtract the 2nd row from the first
<span>7x=40.2<span>5
divide both sides by 7 to isolate x
</span></span><span>x=5.7<span>5

Substitute x into an equation
</span></span><span><span>10(5.75)+4y=77.5
multiply
</span></span>57.5+4y=77.<span>5
subtract 57.5 from both sides
</span>4y=77.5−57.<span>5
Simplify
</span>4y=2<span>0
divide both sides by 4 to isolate y
y = 5

To check you would plug x and y into the equations and see if it equals properly...

The price of drinks is $5.75, the price of popcorn is $5.

Hope this helps
</span>

You might be interested in

Calculate the area of the figure

Paraphin [41]

488 cm squared is the total area

3 0

3 years ago

Read 2 more answers

A pool drains 5000 gallons of water over the course of 5 hours. How many gallons of water, on average, does the pool drain each

Dmitry [639]

Answer:

D. 1000 gallons per hour

Step-by-step explanation:

5000 / 5 = 1000

6 0

3 years ago

Read 2 more answers

Tim is remodeling his square kitchen but has forgotten the dimensions. He knows he had bought 81 square feet of tiles earlier, a

sammy [17]

Answer:

C) 36 feet

Explanation:

P(square)= 4s

s= square root of the area

$4 \times \sqrt{a} \\ a = 81 \\ 4 \times \sqrt{81} \\ 4 \times 9 \\ = 36$

4 0

3 years ago

What is the numeratorfor the following rational expretion? 3/k+4/k=?/k

grin007 [14]

Because they all have the same denominator, all you have to do is add the numerator! So, 3/k + 4/k would equal 7/k

6 0

4 years ago

Read 2 more answers

explain how you can determine if a triangle is a right triangle. (make it look like a middle schooler wrote it :) )

allsm [11]

Answer:

if one of the angles is 90°

Step-by-step explanation:

when it has an angle that is 90° that means that it is a right triangle

let me know if you need more b/c I wasn't sure whether to make it more advanced for middle school lol

Hope this helps! :)

7 0

3 years ago