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Lesechka [4]
2 years ago
9

Y=4x-11. 4x-y=11. solving systems of equations using substitution​

Mathematics
1 answer:
Black_prince [1.1K]2 years ago
3 0

Answer:

infinite number of solutions

Step-by-step explanation:

y = 4x - 11 → (1)

4x - y = 11 → (2)

Substitute y = 4x - 11 into (2)

4x - (4x - 11) = 11  ← distribute parenthesis on left side

4x - 4x + 11 = 11 ( subtract 11 from both sides )

0 = 0 ← true statement

This indicates the system has an infinite number of solutions

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Which real-world story is represented by the addition problem (–2 1/2) + (–3 1/4) = –5 3/4?
allochka39001 [22]

Answer:

A

Step-by-step explanation:

A is the correct answer because the equation matches option A.

(-2 1/2) + (-3 1/4)

The minus sign in -2 1/2 shows that the submarine descended and then descended again with the addition sign. Though the addition sign can mean that it ascended its incorrect.

With the equation in hand, we can prove that option A is correct.

If the submarine descended 2 1/2 miles then here must be a minus sign next to the 2 1/2. But if it ascended then there would've been an addition sign to show that it ascended. The other value - 3 1/4 also shows that it ascended with the help of the addition sign.

Ascends - values increase from smallest to highest.

Descends - values decrease from highest to smallest.

4 0
3 years ago
Help
Natali5045456 [20]

Answer:

1.9 \sqrt{3}

Step-by-step explanation:

3.8 is 2x 3.8/2 is 1.9

5 0
3 years ago
Find the length of each arc. Use the exact answer
Cerrena [4.2K]

Answer:

Option D = 16π/3 ft

Step-by-step explanation:

Arc length formula is written Mathematically as:

Arc length = 2πr × θ /360

r = 4 ft

θ = Central angle in degrees = 240°

2 × π × 4 × 240/360

8π × 240/360

8π × 20/30

16π/3 ft

So, the arc length is 16π/3 ft

3 0
3 years ago
A car is traveling at a steady speed. It travels 1 3/4 miles in 2 1/3 minutes. how far will it travel in 21 minutes? in 1 hour?
GaryK [48]

Answer:

Step-by-step explanation:

1¾ miles/(2⅓ minutes) = (7/4 miles)/(7/3 minutes) = ¾ mile/minute

21 minutes × ¾ mile/minute = 15.75 miles

60 minutes × ¾ mile/minute = 45 miles

8 0
3 years ago
Find: (4x2y3 + 2xy2 – 2y) – (–7x2y3 + 6xy2 – 2y)
Ivahew [28]

Answer:

10x2y3 -4xy2

Step-by-step explanation:

Just take the like terms and separate them-

1) 4x2y3 - (-7x2y3)= 10x2y3

2)2xy2 - 6xy2= -4xy

3)-2y - (-2y)= 0y

Hope this helps :)

8 0
3 years ago
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