All categories

3 years ago

6x + 3y = 33 4x + y = 15 A. x = 2, y = 7 B. x = -13, y = 7 C. x = - 2 3 , y = 12 2 3 D. x = 5, y = 1

Mathematics

1 answer:

klio [65]3 years ago

3 0

6x+3y=33..........(1)

4x+y=15

y=15-4x.........(2)

substitute value of y from (2) in (1)

6x+3(15-4x)=33

distribute 3 over the bracket

6x+45-12x =33

-6x=33-45

-6x=-12

x=2

plugging this value of x in equation 2 we get

15-4x=y

15-4(2)=y

y=15-8

y=7

Answer is x=2 and y=7

You might be interested in

13. A contractor buys 8.2 square feet of sheet metal.

Veseljchak [2.6K]

Answer:

$x = \frac{183}{6.7}$ is the required equation.

The Per sq ft of sheet costs $ 27.31.

Step-by-step explanation:

The total amount of sheet purchased = 8.8 sq. ft

The amount of sheet used = 2. 1 sq ft.

The worth of remaining sheet = $183

Let us assume the cost per sq ft of sheet = $x

Now, the remaining sheet =

Amount of total sheet purchased- Amount of sheet used

= 8.8 sq. ft - 2. 1 sq ft. = 6. 7 sq. ft

So, the worth of the remaining sheet 6.7 sq ft is $183.

⇒ Worth of 1 sq ft of sheet = $183 /6.7 sq ft

or, $x = \frac{183}{6.7} = 27.31$

or x = $27.31

Hence, the Per sq ft of sheet costs $ 27.31.

6 0

2 years ago

Which statement is tru about the value of |-5|

andriy [413]

You forgot to include the options. This might help, though.

6 0

2 years ago

Please help my exam is going on please and both question of math

omeli [17]

Step-by-step explanation:

11) PnQ=QnP

or, {1,2,3}n{1,2,3,4,5} = {1,2,3,4,5} n{1,2,3}

or, {1,2,3} = {1,2,3} .Ans

5 0

2 years ago

P/2 = 6. Find the value of p. ur answer

Andrew [12]

Answ?

Step-by-step explanation:

3 0

2 years ago

Which function has the least value for the y-intercept?

diamong [38]

Answer:

y-intercept is the value of y when x is equal to zero. Because the y intercept is a point on a graph, you'll usually write it in point/ coordinate form.

Step-by-step explanation:

The y-intercept is where the parabola of a function crosses (or intercepts) the y axis.

6 0

3 years ago