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OlgaM077 [116]
2 years ago
14

Solve this system of equations using the substitution method y = 2x + 17 y = 6x - 3

Mathematics
1 answer:
guapka [62]2 years ago
5 0

Step-by-step explanation:

well, as you can witness both of the equations are equal to y, so you're free to reckon that they are equal as well

6x - 3 = 2x + 17 =  =  =  > \\  4x = 20 =  =  =  > x = 5 \: and \:  \\ y = 6(5)  - 3=  =  =  > y = 27

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Find the LCD of the rational expressions in the list
Lelechka [254]

Answer:

30

Step-by-step explanation:

what number does 7 multiply by that also can be multiplied by 5? 30 is the least common denominator between 7 and 5.

6 0
2 years ago
Simplify the expression given below. 1/(2x^2-4x) -2/x
Sholpan [36]

Answer:

(9 - 4 x)/(x (2 x - 4))

Step-by-step explanation:

Simplify the following:

1/(2 x^2 - 4 x) - 2/x

Put each term in 1/(2 x^2 - 4 x) - 2/x over the common denominator x (2 x - 4): 1/(2 x^2 - 4 x) - 2/x = ((x (2 x - 4))/(2 x^2 - 4 x))/(x (2 x - 4)) - (2 (2 x - 4))/(x (2 x - 4)):

((x (2 x - 4))/(2 x^2 - 4 x))/(x (2 x - 4)) - (2 (2 x - 4))/(x (2 x - 4))

A common factor of 2 x - 4 and 2 x^2 - 4 x is 2 x - 4, so (x (2 x - 4))/(2 x^2 - 4 x) = (x (2 x - 4))/(x (2 x - 4)):

((x (2 x - 4))/(x (2 x - 4)))/(x (2 x - 4)) - (2 (2 x - 4))/(x (2 x - 4))

(x (2 x - 4))/(x (2 x - 4)) = 1:

1/(x (2 x - 4)) - (2 (2 x - 4))/(x (2 x - 4))

1/(x (2 x - 4)) - (2 (2 x - 4))/(x (2 x - 4)) = (1 - 2 (2 x - 4))/(x (2 x - 4)):

(1 - 2 (2 x - 4))/(x (2 x - 4))

-2 (2 x - 4) = 8 - 4 x:

(8 - 4 x + 1)/(x (2 x - 4))

Add like terms. 1 + 8 = 9:

Answer: (9 - 4 x)/(x (2 x - 4))

3 0
4 years ago
Read 2 more answers
If l = 65 cm and j = 33 cm, what is the length of k?
erastova [34]

Answer:

d=56

l=65, j=33

l^2 -j^2

65^2-33^2

4225-1089= 3136

√3136=56

7 0
3 years ago
Read 2 more answers
Put these fractions in order least to greatest. 4/6 1/3 and 1/5
stiv31 [10]

Answer:

1/5 < 1/3 < 4/6

Step-by-step explanation:

Using the given inputs:

4/6 1/3 1/5

The least common denominator (LCD) is: 30.

Rewriting as equivalent fractions with the LCD:

4/6 1/3 1/5

20/30 10/30 6/30

Sorting this table by the numerators of the equivalent fractions in order from least to greatest:

1/5   1/3   4/6

6/30 < 10/30 < 20/30

Therefore, the sorted inputs in order from least to greatest is:

1/5 < 1/3 < 4/6

6 0
3 years ago
What is the equation in point−slope form of the line passing through (0, 6) and (1, 3)?
Leya [2.2K]
(0,6)(1,3)
slope(m) = (3 - 6) / (1 - 0) = -3

y - y1 = m(x - x1)
slope(m) = -3
(1,3)...x1 = 1 and y1 = 3
now we sub
y - 3 = -3(x - 1) <===
5 0
4 years ago
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