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Ad libitum [116K]
3 years ago
5

Evaluate: 2x +3y = 4 -7x + 3y = -1

Mathematics
1 answer:
jolli1 [7]3 years ago
3 0
We solving for x or y
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Write in Expanded form: 75,300,207
Lubov Fominskaja [6]

Answer:

\huge\boxed{Answer\hookleftarrow}

75, 300, 207

<h3>⎆ <u>In expanded form :-</u></h3>

70,000,000 + 5,000,000 + 300,000 + 0 + 0 + 200 + 0 + 7

# ꧁❣ RainbowSalt2²2² ࿐

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2 years ago
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A radio station claims that the amount of advertising per hour of broadcast time has an average of 13 minutes and a standard dev
zimovet [89]

Answer:

Z = 3.33

Step-by-step explanation:

Z-score:

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.

In this question:

\mu = 13, \sigma = 1.2

You listen to the radio station for 1​ hour, at a randomly selected​ time, and carefully observe that the amount of advertising time is equal to 17 minutes. Calculate the​ z-score for this amount of advertising time.

We have to find Z when X = 17. So

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

Z = \frac{17 - 13}{1.2}

Z = 3.33

5 0
3 years ago
Two cars traveling toward each other are 250 miles apart. Car a is traveling 15 miles per hour faster than car
Anon25 [30]

Let car  b be travelling at x  mph.  as they are travelling towards each other their speed of approach is (x + x + 15 ) mph.  So we have the equation

speed = distance / time

2x + 15 =  250 / 2

2x = 125 - 15 = 110

x = 55 mph

Car b travels at 55 mph and car a travels at 70 mph  Answer

3 0
2 years ago
Simplify.<br><br> (2m^3n^2)^5
pashok25 [27]

10m15n10 because you just multiply everything by 5

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3 years ago
The probability that Liu Yang makes a three-point shot in basketball is 10%. For practice, Liu Yang will regularly
Delicious77 [7]

Answer:

0.3 is the answer

Step-by-step explanation:

3 0
3 years ago
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