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olya-2409 [2.1K]
4 years ago
8

Expertsss/aceee plzzz helpppp quickkklyyyy (81% complete a couple more to go)

Mathematics
1 answer:
Mnenie [13.5K]4 years ago
6 0
I believe the answer is the first one
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2n-5=11 what does n=
grandymaker [24]

Answer:

n = 8

Step-by-step explanation:

2n - 5 = 11

2n = 11 + 5

2n = 16

n = 16/2

n = 8

5 0
3 years ago
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Y = x and y =x^2 - 2
maxonik [38]

Answer:

  (-1, -1) and (2, 2)

Step-by-step explanation:

Substitute for y in the first equation and solve the quadratic.

  x = x^2 -2

  x^2 -x -2 = 0  . . . . subtract x

  (x -2)(x +1) = 0 . . . .factor

Solutions are the values of x that make these factors be zero:

  x = 2, x = -1

Since y=x, the solutions are ...

  (x, y) = (-1, -1) and (2, 2)

6 0
4 years ago
Help me please!! Will mark brainliest
VARVARA [1.3K]

Answer:

see explanation

Step-by-step explanation:

Given

F = \frac{9}{5}(K - 273.15) + 32

Multiply through by 5 to clear the fraction

5F = 9(K - 273.15) + 160 ( subtract 160 from both sides )

5F - 160 = 9(K - 273.15) ← distribute

5F - 160 = 9K - 2458.35 ( add 2458.35 to both sides )

5F + 2298.35 = 9K ( divide both sides by 9 )

K = \frac{5F+2298.35}{9}

(b)

When F = 180, then

K = \frac{5(180)+2298.35}{9}

   = \frac{900+2298.35}{9}

   = \frac{3198.35}{9}

   ≈ 355.37 ( to the nearest hundredth )

6 0
3 years ago
Sarah hopes to be 5 feet tall by her next birthday. Right now, she is 148 centimeters tall. How many more centimeters does Sarah
Novay_Z [31]

5 feet = 60 inches

Sarah needs to grow 6 more centimeters.

5 0
3 years ago
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F(6) if f(x) = 2x – 5
makkiz [27]

Answer:

7

Step-by-step explanation:

5 0
3 years ago
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