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Alisiya [41]
3 years ago
14

Choose the correct rule for the graph shown. A) y = 2x B) y = 3x + 1 C) y = 2x + 1 D) y = 2x - 1

Mathematics
1 answer:
Alika [10]3 years ago
3 0
<h2>Explanation:</h2><h2></h2>

No graph has been provided, but I've provided the graph shown below. Recall that the slope intercept form of the equation of a line is given by:

y=mx+b \\ \\ \\ Where: \\ \\ m:slope \\ \\ b:y-intercept

First of all, the y-intercept of this graph lies on the point:

(0,1)

So our correct option could be either B) or C) because the y-intercept in those cases lies  also on the point (0,1). If you lies on this point and walk 1 units horizontally, then the y-coordinate runs 3 units up until it gets point (1,4). Therefore, the slope of this line is m=3

In conclusion, this graph is represented by the equation:

B) y = 3x + 1

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Step-by-step explanation:

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an 18-foot wire is to be cut so that the longer piece is 5 times longer than the shorter piece. find the length of each peice
gtnhenbr [62]

Answer:

The longer piece is 15 feet long and the shorter piece is 3 feet long.

Step-by-step explanation:

Create a system of equations where x is the length of the longer piece and y is the length of the shorter piece:

x + y = 18

x = 5y

Solve by substitution by substituting 5y as x into the first equation:

x + y = 18

5y + y = 18

Solve for y:

6y = 18

y = 3

So, the shorter piece is 3 feet long. Since the longer piece is 5 times longer, find its length by multiplying this by 5:

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So, the longer piece is 15 feet long.

The longer piece is 15 feet long and the shorter piece is 3 feet long.

7 0
3 years ago
In factored form please help
Brilliant_brown [7]

Answer:

3rd option

Step-by-step explanation:

\frac{3x^2-3}{x^2-5x+4} ( factorise numerator and denominator )

3x² - 3 ← factor out 3 from each term

= 3(x² - 1²) ← x² - 1 is a difference of squares and factors in general as

a² - b² = (a - b)(a + b)

x² - 1

= x² - 1²

= (x - 1)(x + 1) , then

3x² - 3 = 3²(x - 1)(x + 1) ← in factored form

--------------------------------

x² - 5x + 4

consider the factors of the constant term (+ 4) which sum to give the coefficient of the x- term (- 5)

the factors are - 1 and - 4 , since

- 1 × - 4 = + 4 and - 1 - 4 = - 5 , then

x² - 5x + 4 = (x - 1)(x - 4)

then

\frac{3x^2-3}{x^2-5x+4} = \frac{3(x-1)(x+1)}{(x-1)(x-4)} ← in factored form

3 0
2 years ago
(b)<br> Using the formula 2T = M + 3K, find the value of K when T = 11 and M = 4.
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Answer:

K = 6

Step-by-step explanation:

Plug in what the letter equals to

Equation will look like:

2(11) = 4 + 3k  or  3k + 4 = 2(11)

multiple the 2 by 11 and get 22

3k + 4 = 22 subtract the 4 so it can leave the 3k alone

22 - 4 = 18 now divide 3 from k and do it in the other side

18/3 = 6

so K = 6

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