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erma4kov [3.2K]
3 years ago
10

Plz help will mark brainliest if right

Mathematics
1 answer:
Fiesta28 [93]3 years ago
5 0

Answer:

sorry

Step-by-step explanation:

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X+y=2 8x+3y=-19 substitution
padilas [110]

Answer:

{x,y}={−5,−7}

Explain:

// Solve equation [2] for the variable  y [2]    3y = 7x + 14 [2]    y = 7x/3 + 14/3 // Plug this in for variable  y  in equation [1] [1]    8x - 3•(7x/3+14/3) = -19 [1]    x = -5 // Solve equation [1] for the variable  x [1]    x = - 5 // By now we know this much : x = -5 y = 7x/3+14/3 // Use the  x  value to solve for  y y = (7/3)(-5)+14/3 = -7 Solution : {x,y} = {-5,-7}

Hoped I helped

4 0
3 years ago
Read 2 more answers
Suppose you buy a $50 coffee maker in an area where the sales tax is 8%. When you check out, 8% of $50 would be added to your to
ASHA 777 [7]

Answer:

4

Step-by-step explanation:

8% is also 8/100. This would be true for all percents 0 to 100%. If it were 42% it can be written as 42/100.

So, 8% is 8/100. If you want to find 8/100 of 50 multiply them.

8/100 * 50/1 = (8*50) /100

400/100 = 4

7 0
2 years ago
Read 2 more answers
You are on your way to work. You drive 3.9 miles to a gas station and buy gas. Your workplace is 1.39 miles from the gas station
Whitepunk [10]

Answer:

Approx. 5.3 miles

Step-by-step explanation:

4 0
3 years ago
The average rate of change of a function f(x) = x2 between x = 3 and x = 9 is
masya89 [10]

Answer:

12.

Step-by-step explanation:

Average rate of change = (value of the function when x = 9 - value when x=3)

/

(9 - 3)

= f(9) - f(3) / (9-3)

= (9^2 - 3^2) / (9-3)

= 72 / 6

=  12.

6 0
3 years ago
A recipe for lemonade calls for 1 cup of sugar and 5 cups of water how much sugar is used per cup of water ?
Alexxandr [17]

Answer:

1/5 cup of sugar is used for each cup of water

Basic math

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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