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Oksana_A [137]
3 years ago
11

During his 360-min. shift at the local grocery store, Jared spent 122 min. stocking shelves, 74 min. bagging groceries, and 62 m

in. sweeping the floors. He also took a 35-min. lunch break. Use front-end estimation to find about how many minutes Jared had left for miscellaneous tasks.
A. 70
B. 80
C. 90
D. 100
Mathematics
1 answer:
sergeinik [125]3 years ago
3 0

Answer:

d.100

Step-by-step explanation:

i just took the test

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Calculate the value of b + 12.5=12
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The cost of a pair of jeans was changed from $47 to $42.13. What was the percent change?
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Answer:

10.36

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3 years ago
What is the value of K?
Ksju [112]
Answer: The value of k for which one root of the quadratic equation kx2 - 14x + 8 = 0 is six times the other is k = 3.
Let's look into the solution step by step.

Explanation:

Given: A quadratic equation, kx2 - 14x + 8 = 0

Let the two zeros of the equation be α and β.

According to the given question, if one of the roots is α the other root will be 6α.

Thus, β = 6α

Hence, the two zeros are α and 6α.

We know that for a given quadratic equation ax2 + bx + c = 0

The sum of the zeros is expressed as,

α + β = - b / a

The product of the zeros is expressed as,

αβ = c / a

For the given quadratic equation kx2 - 14x + 8 = 0,

a = k, b = -14, c = 8

The sum of the zeros is:

α + 6α = 14 / k [Since the two zeros are α and 6α]

⇒ 7α = 14 / k

⇒ α = 2 / k --------------- (1)

The product of the zeros is:

⇒ α × 6α = 8 / k [Since the two zeros are α and 6α]

⇒ 6α 2 = 8 / k

⇒ 6 (2 / k)2 = 8 / k [From (1)]

⇒ 6 × (4 / k) = 8

⇒ k = 24 / 8

⇒ k = 3
6 0
2 years ago
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