All categories

3 years ago

If ax + y=23, 3x - y = 9, and x =8, what is the value of a ?

Mathematics

1 answer:

inna [77]3 years ago

6 0

Answer:

a = 1

Step-by-step explanation:

x = 8

3x - y = 9

3(8) - y = 9

24 - y = 9

-y = 9 - 24

-y = -15

y = 15

ax + y = 23

a(8) + 15 = 23

8a = 23 - 15

8a = 8

a = 8/8

a = 1

You might be interested in

Help me pleasee i really need help

Usimov [2.4K]

For ALL of these....use these formulas...

Finding Markup%

Markup=Selling Price-Cost

Markup%= $\frac{Markup}{Cost}*100$

1.) Recliner Chair. Cost=$61 Sell Price=$75.99

Markup= $75.99-$61
M=$14.99

Markup%= $\frac{14.99}{61} *100$

Markup%=24.5% (Markup less than 25%)

2.) Basket Ball. Cost=$23.75 Selling Price=$29.95

Markup= $29.95-$23.75
M=$6.20

Markup%= $\frac{6.20}{23.75} *100$

Markup%=26.1 (Markup greater than 25%)

3.) Necklace. Cost=$15 Selling Price=$19.25

Markup= $19.25-$15
M=$4.25

Markup%= $\frac{4.25}{15}*100$

Markup%=28.3 (Markup greater than 25%)

4.)Notepad. Cost=$1.19 Selling Price=$1.50

Markup=$1.50-$1.19
M=$0.31

Markup%= $\frac{0.31}{1.19}*100$

Markup%=26.1 (Markup greater than 25%)

5.)Speakers. Cost=$44.55 Selling Price=$54.99

Markup=$54.99-$44.55
M=$10.44

Markup%= $\frac{10.44}{44.55} *100$

Markup%=23.4 (Markup less than 25%)

6.) DVD. Cost=$10.80 Selling Price=$12.95

Markup=$12.95-$10.80
M=$2.15

Markup%= $\frac{2.15}{10.80}*100$

Markup%=19.9 (Markup less than 25%)

I hope this benefits other people in the future. :D

5 0

3 years ago

Bill makes leather shoes. He charges $45 for a pair of women's shoes and $50 for a pair of men's shoes. He sells x pairs of wome

Sav [38]

That is a very easy question the answer is:
2,500/50=

so the answer is 2500/50=50

ps:the / sign means division

8 0

3 years ago

Read 2 more answers

One eighth of a number decreased by 5 is at least 30

Lapatulllka [165]

30+5=35

35*8=280

280 is the original number

8 0

4 years ago

a stick of butter contains 8 tablespoons of butter. A recipe calls for 2/3 tablespoons of butter. How many batches of the recipe

nata0808 [166]

A third of a stick is a little over five tbsp. So only 1 batch can be made.

3 0

4 years ago

write the ratio in simplest form. the hockey team played 82 regular season games last year. If they won 44 games, what is the ra

Masteriza [31]

They played 82 games.....they won 44.....so they lost (82 - 44) = 38

ratio of wins to loses...
they won 44
they lost 38
the ratio would be : 44/38 which reduces to 22/19 or 22:19 or 22 to 19

3 0

3 years ago