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myrzilka [38]
2 years ago
8

When x equals 12 , x+3y=21 need help

Mathematics
1 answer:
crimeas [40]2 years ago
6 0

Answer:

y=3

Step-by-step explanation:

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Find the x- and y-intercept of the line.<br><br> -7/5x -4y = 7
rosijanka [135]
First, isolate the variables to either side.

4y = -7/5x -7

Second, simplify in terms of y.

y = -7/20x - 7/4

Third, plug 0 in for y to find the y intercept and factor the x side to make it simple. Then, find the value that makes the x-factor zero.

0 = (-7/4)(1/5x +1)

1/5x + 1 = 0

1/5x = -1

x = -5

The x-intercept is (-5,0)

Fourth, plug zero in for x to find the y-intercept.

y = -7/20*(0) -7/4

y = -7/4

Therefore, the y-intercept is (0,-7/4) and the x-intercept is (-5,0).

6 0
3 years ago
The local hardware store has blue buckets that hold 2 gallons of water and white buckets that hold 5 gallons of water. You bough
Katarina [22]

Answer:

4 White, 3 Blue

Step-by-step explanation:

5w+2b=26

Closest five multiple that leaves an even remainder is 4.

5×4=20

26-20=6÷2=3

5 0
3 years ago
Read 2 more answers
For the equation 4(x - 2) = 4x + K which value of k will create an equation with no solutions?
lawyer [7]

Step-by-step explanation:

k=8 that is the equation with no solutions

5 0
3 years ago
What is the surface area of this triangular prism? The base of each triangle is 42 m and the height of the triangular base is 20
shutvik [7]

<u>Given</u>:

The base of each triangular base is 42 m.

The height of each triangular base is 20 m.

The sides of the triangle are 29 m each.

The height of the triangular prism is 16 m.

We need to determine the surface area of the triangular prism.

<u>Surface area of the triangular prism:</u>

The surface area of the triangular prism can be determined using the formula,

SA=bh+(s_1+s_2+s_3)H

where b is the base of the triangle,

h is the height of the triangle,

s₁, s₂ and s₃ are sides of the triangle and

H is the height of the prism.

Substituting the values, we get;

SA=(42)(20)+(42+29+29)(16)

SA=840+(100)(16)

SA=840+1600

SA=2440

Thus, the surface area of the triangular prism is 2440 m²

8 0
3 years ago
Suppose you want to buy one pair of pants and several pairs of socks.
dedylja [7]

Answer:

8

Step-by-step explanation:

50/5.95

3 0
3 years ago
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