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Alik [6]
3 years ago
5

Use the substitution method to find the value of y in the given system of equations y=2x+5 x+y=4

Mathematics
1 answer:
seropon [69]3 years ago
6 0

Answer:

y = 13/3

Step-by-step explanation:

substitute y=2x+5 in x+y = 4

x+2x+5 = 4

3x+5=4

3x= -1

x= -1/3

substitute x= 1-/3 in x+y = 4

-1/3 +y = 4

y = 13/3

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Answer:

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Step-by-step explanation:

6 0
3 years ago
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Roman55 [17]

Answer:

5z+5=3z+6

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5 0
3 years ago
When a stepladder is placed as shown, is it possible for the lower ends of the ladder to be 12 feet apart? Explain​
nataly862011 [7]

Answer:

No, with the guides in between the two ladders, it is not possible for the lower ends of the ladder to be up to 12 feet apart

Step-by-step explanation:

The given parameters are;

The length of two sides of the step ladder = 12 feet

The maximum value allowable for the included angle between the two 12 feet ladders = 58°

Therefore, the maximum value of the third side facing the included angle is given as follows;

let "a" represent the maximum value of the third side formed by the distance apart of the lower end of the ladder, by cosine rule, we have;

a² = 12² + 12² - 2 × 12 × 12 × cos(58°) = 135.383251901

∴ a = √(12² + 12² - 2 × 12 × 12 × cos(58°)) ≈ 11.64

The maximum value of the third side formed by the distance apart of the lower end of the ladder = a ≈ 11.64 feet < 12 feet

Therefore, it is not possible for the lower ends of the ladder to be up to 12 feet apart.

5 0
3 years ago
Which answer choice correctly completes the sentence? The bridge was closed, but that hasn't __________ us any time. A. costed B
Rainbow [258]
The bridge was closed, but that hasn't <span>cost </span>us any time
7 0
4 years ago
Explain what happens when you have an exponent to the power of another exponent.
jekas [21]

Answer:

The "power rule" tells us that to raise a power to a power, just multiply the exponents. Here you see that 52 raised to the 3rd power is equal to 56.

Step-by-step explanation:

7 0
3 years ago
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