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Elis [28]
3 years ago
12

Help me out please simple 8th grade math.

Mathematics
1 answer:
galben [10]3 years ago
6 0
X-3
The blank is minus 3
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Find all solutions of the equation in the interval [0, 2 pi) 2 cos0-1=0
ddd [48]

Answer:

θ = π/3, 5π/3

Step-by-step explanation:

2 cos θ - 1 = 0

2 cos θ = 1

cos θ = 1/2

θ = π/3, 5π/3

7 0
3 years ago
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It takes Sam 3 hours to rake leaves, but if Laura helps, it takes 2 hours. How long would it take Laura to rake the leaves on he
Klio2033 [76]

Answer:

6 hours

Step-by-step explanation:

Given that:

Time taken by Sam = 3 hours

Sam's rate = 1/3

Time taken : Sam + Laura = 2 hours

Sam's rate + Laura's rate = 1/2

Let time taken by Laura = x

1/3 + 1/x = 1/2

1/x = 1/2 - 1/3

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1/x = 1 /6

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Hencw, it will take 6 hours for Laura alone to rake leaves

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2 years ago
Solve the quadratic equation by factoring. check your solutions in the original equation. (enter your answers as a comma-separat
Scrat [10]
2x²-19x-33=0
(2x-22 )(2x.+3 ) = 0
(x-11)(2x+3)=0
x-11=0 implies x = 11
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3 0
3 years ago
As an estimation we are told 5 miles is 8 km.
melamori03 [73]

Answer:

Step-by-step explanation:

52.5 mi(8 km/5mi) = 84 km

3 0
3 years ago
Which of the following is a reasonable estimated answer to the following problem?
bulgar [2K]
989,867 \approx 1,000,000
999 \approx 1000

\implies  \frac{989,867}{999} \approx  \frac{1,000,000}{1000}
\frac{1,000,000}{1000} = 1000

So the answer is approximately 1000.
4 0
3 years ago
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