Having trouble finding x

Answers

Answer 1

Answer:

Answer:

x=2

Step-by-step explanation:

All of the angles equal 360. So if side z is equal to 100 then 360-200 = 160. The side on the left also is equal to the right side. 160-140 =20. 20/10 is 2. X is equal to 2.

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Could you help me solve y = x^2+6x+7?

Answers

Answer:

x ≈ -1.585786438 or x ≈ -4.414213562

y = 7

Step-by-step explanation:

This should be a parabola function.

Let y = 0 so we can find the two x-intercepts. (x1,0) and (x2,0)

x^2+6x+7 = 0

Using the quadratic equation, we get:

x ≈ -1.585786438 or x ≈ -4.414213562

Now we can find y by setting x = 0, so that we get a y-intercept. (0,y)

y = 0^2+6(0)+7

y = 7

I WILL MAKE YOU THE BRAINLIEST EASY QUESTION

Answers

Answer:

B.) 3.65, 3 2/3, 3.7

Step-by-step explanation:

Answer:

Step-by-step explanation:

The second option shows the numbers in order from least to greatest because 3 2/3 simplified is 3.6666666

Ana and Ling are solving |3x + 14| = -6x.Is either of them correct?...............................
Explain your reasoning.

Answers

Answer:

No! Both are wrong!

Step-by-stepExplanation:

the value of absolute function, (|.|) is always positive

that means -6x always has to be positive

and for -6x to be positive x has to be negative

(since, two negatives make a positive)

therefore, the value of x to the equation will be a negative value and not a positive one.

Ana thinks both positive and negative values of x will be the solution, whereas Ling thinks negative value of x can't be a solution. So, they're both wrong.

ONLYnegativevalue of x will be the solution.

Scores on a test in a very large class are bell-shaped and symmetric. The mean on the test was 75, and the standard deviation was 5. What percent of the scores were above 75?

Answers

Answer:

50% of the scores were above 75

Step-by-step explanation:

Problems of normally distributed(bell-shaped) samples are 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:

$Z = (X - \mu)/(\sigma)$

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.

In this problem, we have that:

$\mu = 75, \sigma = 5$

What percent of the scores were above 75?

This is 1 subtracted by the pvalue of Z when X = 75. So

$Z = (X - \mu)/(\sigma)$

$Z = (75 - 75)/(5)$

$Z = 0$

$Z = 0$ has a pvalue of 0.5

1 - 0.5 = 0.5

50% of the scores were above 75

A coin is flipped 8 times. Find the probability of the event:

exactly 6 heads

Answers

Answer:

P(E)=56256=732. Step-by-step explanation:

Thus, the probability of getting exactly 3 heads when a coin is flipped 8 times in a row

In Mexico, avocados are 48 pesos per kilogram. What is the cost, in cents, of an avocado that weighs 0.45 lb if the exchange rate if the exchange rate is 18 pesos to the dollar?