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SSSSS [86.1K]
4 years ago
7

One cold night the temperature was 0 degrees at 8 p.m. The temperature dropped at a constant rate from 8 p.m. to midnight. At mi

dnight the temperature was −16.8 degrees. What was the temperature at 9 p.m.?
Mathematics
1 answer:
Elena L [17]4 years ago
4 0

-16.8 = m(4)

-16.8 / 4 = -4.2

So the constant rate is -4.2.

Hope this Helps!!

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3 years ago
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What is the solution of the linear equation? LaTeX: 5k\:+\:3.8\:=\:3k\:+\:95 k + 3.8 = 3 k + 9 Group of answer choices 26 6.4 .0
lakkis [162]

Answer:

k = 2.6

Step-by-step explanation:

Given

5k + 3.8 = 3k + 9

Required

Solve

5k + 3.8 = 3k + 9

Collect like terms

5k -3k+ 3.8 = 3k -3k + 9

2k+ 3.8 = 9

Subtract 3.8 from both sides

2k+ 3.8 - 3.8= 9 - 3.8

2k= 9 - 3.8

2k = 5.2

Divide through by 2

k = 5.2/2

k = 2.6

4 0
3 years ago
What is it AHHH HELP‼️
TEA [102]

Answer

5.5cm

Step-by-step explanation:

The radius of a circle is the distance from the center of the circle to any point on its circumference.

The easiest way to find the radius is by dividing the diameter in half.

Radius = 1/2 × diameter

Here diameter is given as 11 cm.

Hence Radius = 1/2 × 11 cm.

= 11/2 cm.

= 5.5 cm.

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3 years ago
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5 ( x + y) +3 (2x +y)​
satela [25.4K]

Answer:

11x + 8y

Step-by-step explanation:

(5x + 5y) + 3 ( 3 · 2x + 3y)

(5x + 5y) + (6x + 3y)

5x + 5y + 6x + 3y

5x + 6x + 5y + 3y

11x + 8y

7 0
3 years ago
How do you do this question?
attashe74 [19]

Answer:

∑ₙ₌₀°° 8 (-1)ⁿ x⁴ⁿ⁺¹ / (9ⁿ (2n)!)

Step-by-step explanation:

Start with the Maclaurin series for cos x.

cos x = ∑ₙ₌₀°° (-1)ⁿ x²ⁿ / (2n)!

Substitute ⅓ x².

cos (⅓ x²) = ∑ₙ₌₀°° (-1)ⁿ (⅓ x²)²ⁿ / (2n)!

cos (⅓ x²) = ∑ₙ₌₀°° (-1)ⁿ (⅓)²ⁿ x⁴ⁿ / (2n)!

cos (⅓ x²) = ∑ₙ₌₀°° (-1)ⁿ x⁴ⁿ / (9ⁿ (2n)!)

Multiply by 8x.

8x cos (⅓ x²) = ∑ₙ₌₀°° 8x (-1)ⁿ x⁴ⁿ / (9ⁿ (2n)!)

8x cos (⅓ x²) = ∑ₙ₌₀°° 8 (-1)ⁿ x⁴ⁿ⁺¹ / (9ⁿ (2n)!)

5 0
3 years ago
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