3 years ago

Please help me3x - 12y = 60 x + 2y = 14will mark brainliest

Mathematics

1 answer:

Setler79 [48]3 years ago

7 0

Answer:

x = 8, y = 3

Step-by-step explanation:

3x - 12y = 60

x + 2y = 14

3x - 12y = 60

3x + 6y = 42 (multiply by 3 so the x is the same as the top equation)

6y = 18 (subtract the equations)

y = 18 / 6

= 3

To find x, substitute y into the 2nd equation since it is the simplest so:

x + 2(3) = 14

x + 6 = 14

x = 14 - 6

= 8

You might be interested in

Yoko pays $19.60 for a pack of 4 towels. Find the unit price in dollars per towel. If necessary, round your answer to the neares

beks73 [17]

One towel would cost $4.90

6 0

3 years ago

If m∠ABD= 48 and m m∠DBC= 78 find m∠ABC

Verdich [7]

Answer:

126 all you have to do is take the two measurements and add them together

6 0

3 years ago

Carolyn was asked to solve the following system of equations. Her work is shown. What is the solution to the system of linear eq

Natalka [10]

Answer:

(11, 13)

Step-by-step explanation:

Carolyn's work is incorrect. Below is the correct solution:

Given:

$3x - 2y = 7$ ----› Equation 1

$y = x + 2$ -----› Equation 2

Substitute y = (x + 2) in equation 1

$3x - 2y = 7$ ----› Equation 1

$3x - 2(x + 2) = 7$ (substitution)

$3x - 2(x) -2(+2) = 7$ (distributive property)

[Note: this is where Carolyn made a mistake]

$3x - 2x - 4 = 7$

Collect like terms

$x - 4 = 7$

$x = 7 + 4$ (addition property of equality).

$x = 11$

Substitute x = 11 in equation 2

$y = x + 2$ -----› Equation 2

$y = 11 + 2$ (substitution)

$y = 13$

✅The solution to the system of equations would be:

(11, 13)

8 0

3 years ago

OMG PLSS ANSWERR People use water to cook, clean, and drink every day. An estimate of 17.2% of the water used each day is for c

Anna71 [15]

Answer:

260 gallons

Step-by-step explanation:

Hope it's correct

8 0

3 years ago

What are the opposites of 3, 7.5 and -2 2/3?

kirill115 [55]

-3,-7.5,2 2/3 are the opposites of those numbers

5 0

3 years ago