Ask question

Ask question

All categories

3 years ago

11

NEED HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!

1 answer:

Archy [21]3 years ago

5 0

Let the price of a bag of balloon=x and the price of a roll of crepe paper =y
5x+2y=38
12x+14y=128
These are the equation you get from the question
5x+2y=38
-5x -5x
2y=38-5x divide both side by 2
y=19-5/2x

  12x+14y=128 plug in the y
12x+14(19-5/2x)=128
12x+266-35x=128
-23x+266=128
-266 -266
-23x=-138 divide both side by -23
x=6 this will be the price of a bag of balloon

5x+2y=38 plug in x
5(6)+2y=38
30+2y=38
-30 -30
2y=8 divide both side by 2
y=4 this will be the price of a roll of crepe paper

You might be interested in

Multiply & simplify: (2a - 3)(2a + 1)

RoseWind [281]

I hope this helps you

2a.2a+1.2a-3.2a-3.1

4a^2+2a-6a-3

4a^2-4a-3

3 0

3 years ago

Sally is completely unprepared for a three-question multiple-choice pop quiz, so she randomly guesses the answer to each questio

Ksivusya [100]

Answer: its D i just did it

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Washington is 44 mi south of Lawrence. Midland is 63 mi east of Lawrence. How far apart are Washington and Midland? Round your a

IgorLugansk [536]

use the pythagorean theorem...

77 miles

6 0

4 years ago

Mal works at a photo gallery. He charges $50 for a large photo and $40 for a large frame. Sales tax is 5%. How much total tax wi

frez [133]

Answer:

$4.50

Step-by-step explanation:

Okay so, first add both.

50+40 is 90, then multiply 90 by the tax percent which is

90x5%=4.5

If expression then,

x=money that they have to pay.

5%(50+40)=x (the original)

btw there's already a question like this :

brainly.com/question/19455247

8 0

2 years ago

Find the angle between the vectors.<br> U=< -4,-3><br> V = < -1,5>

kati45 [8]

Step-by-step explanation:

The formula for the angle between vectors

$\alpha = \cos {}^{ - 1} ( \frac{uv}{ |u| |v| } )$

To multiply vectors, multiply the first component and multiply the second component and add them.

(-4*-1) + (-3*5)= 4-15=-11.

To find magnitude of vectors, use the Pythagorean theorem

$u = \sqrt{ { - 4}^{2} + { - 3}^{2} } = 5$

$v = \sqrt{ - 1 {}^{2} + 5 {}^{2} } = \sqrt{26}$

so

$|u| |v| = 5 \sqrt{26}$

Know we have,

$\alpha = \cos {}^{ - 1} ( \frac{7}{5 \sqrt{26} } )$

$\alpha = 105.94$

in degrees,

$\alpha = 1.849$

in radians

8 0

2 years ago

Read 2 more answers