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3 years ago

Solve this quadratic equation. x 2 + 2x - 22 = 0

1 answer:

8 0

x2+2x−22=0x2+2x-22=0Use the quadratic formula to find the solutions.−b±√b2−4(ac)2a-b±b2-4(ac)2aSubstitute the values a=1a=1, b=2b=2, and c=−22c=-22 into the quadratic formula and solve for xx.−2±√22−4⋅(1⋅−22)2⋅1
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What is a correct congruence statement for the triangles shown? Enter your answer in the box.

Nesterboy [21]

Answer:

ASA

Step-by-step explanation:

there are two congruent angles with an included side in between

6 0

1 year ago

Read 2 more answers

Can you solve this question for me?

krek1111 [17]

y+2 = 3x

subtract 2 from each side

y = 3x-2

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3 years ago

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Laboratory experiment shows that the life of the average butterfly is normally distributed with a mean of 18.8 days and a standa

inessss [21]

Answer:

a) 0.4164

Step-by-step explanation:

Mean lifespan (μ) = 18.8 days

Standard deviation (σ) = 2 days

For any given lifespan 'X', the z-score is:

$z=\frac{X- \mu}{\sigma} \\z=\frac{X- 18.8}{2}$

For X=12.04 days:

$z=\frac{12.04 - 18.8}{2} \\z=-3.38$

A z-score of -3.38 falls in the 0.036-th percentile of a normal distribution.

For X=18.38 days:

$z=\frac{18.38 - 18.8}{2} \\z=-0.21$

A z-score of -3.38 falls in the 41.68th percentile of a normal distribution.

The probability that a butterfly lives between 12.04 and 18.38 days is

$P=41.68-0.036\\P=41.64\%\ or\ 0.4164$

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3 years ago

Evaluate 9 – b when b = 8.

FromTheMoon [43]

Answer:

9 - b = ? 9 - 8 = 1 So, your answer is 1.

Step-by-step explanation:

5 0

3 years ago

Determine how many solutions if correct bainliest

PolarNik [594]

Answer:

No solutions

Step-by-step explanation:

6x+2y=20

-3x-y=-4 (by rewriting)

6/-3 = 2/-1≠20/-4

-2=-2≠-5

So it has no solutions

5 0

3 years ago