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GaryK [48]
3 years ago
14

Find two numbers that Multiply to -40 and add to 6

Mathematics
2 answers:
Tanzania [10]3 years ago
8 0
Reorder the terms: 6.25 + -5y + y^2 = -14 + 6.25

Combine like terms: -14 + 6.25 = -7.75 6.25 + -5y + y2 = -7.75

Factor a perfect square on the left side: (y + -2.5)(y + -2.5) = -7.75

Can't calculate square root of the right side (negative). The solution to this equation could not be determined.
Cerrena [4.2K]3 years ago
3 0
X * y = -40
X + y = 6
I believe it would be -4 and 10
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Please helppp me on this :(
ra1l [238]

Answer: the answer is 4 decimal places and the second one is 10 to the power of 4 (10*4)

Step-by-step explanation:

5 0
3 years ago
Jill bought a lamp for $40. She sold it at a garage sale for $12. What was the approximate decrease?
Vesnalui [34]

Answer:

she was left with 28$ I'm in high school i think I'm right

Step-by-step explanation:

3 0
3 years ago
The weight of turkeys is normally distributed with a mean of 22 pounds and a standard deviation of 5 pounds. a. Find the probabi
Masja [62]

Answer:

a. 0.443

b. 0.023

Step-by-step explanation:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

The weight of turkeys is normally distributed with a mean of 22 pounds and a standard deviation of 5 pounds.

This means that \mu = 22, \sigma = 5

a. Find the probability that a randomly selected turkey weighs between 20 and 26 pounds.

This is the pvalue of Z when X = 26 subtracted by the pvalue of Z when X = 20. So

X = 26

Z = \frac{X - \mu}{\sigma}

Z = \frac{26 - 22}{5}

Z = 0.8

Z = 0.8 has a pvalue of 0.788

X = 20

Z = \frac{X - \mu}{\sigma}

Z = \frac{20 - 22}{5}

Z = -0.4

Z = -0.4 has a pvalue of 0.345

0.788 - 0.345 = 0.443

The answer is 0.443

b. Find the probability that a randomly selected turkey weighs below 12 pounds.

This is the pvalue of Z when X = 12. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{12 - 22}{5}

Z = -2

Z = -2 has a pvalue of 0.023

The answer is 0.023.

8 0
3 years ago
I really need help bad!!
const2013 [10]

Answer:

  5.  x = 17

  7.  x = 2

Step-by-step explanation:

The applicable relation is, "the product of the near distance to the circle and the far distance to the circle is the same for each secant." Distance is measured from the point where the secants intersect.

__

<h3>5.</h3>

Using the rule, we have ...

  7(7+x) = 8(8+13)

  7+x = 24 . . . . . . . . . divide by 7

  x = 17 . . . . . . . . . . subtract 7

__

<h3>7.</h3>

The same rule applies.

  7(7 +6x -1) = 9(9 +x +3)

  42x +42 = 9x +108 . . . . . . simplify

  33x = 66 . . . . . . . . . . . . . subtract 9x+42

  x = 2 . . . . . . . . . . . . . . divide by 33

3 0
2 years ago
Use the order of operations to evaluate the expression below.<br> 6 +5•8-80/4-3-3
11Alexandr11 [23.1K]

Answer:

20

Step-by-step explanation:

6 + 5 × 8 - 80 ÷ 4 - 3 - 3

Step 1 (multiply 5 x 8)

Step 2 (divide 80÷5)

Step 4 (add 6 + 40)

Step 5 (subtract 46-20)

Step 6 (subtract 26-3-3)

Which then leaves you with 20

Hope this helped!

:)

7 0
3 years ago
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