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Vadim26 [7]
3 years ago
11

7th-grade math I WILL GIVE BRAINLIEST !

Mathematics
1 answer:
andriy [413]3 years ago
6 0

Answer:

It includes it because with out it there will be no center and it wouldn't be right. And with out it ever equation wont be proportional

Step-by-step explanation:

I really hope this helps Im just saying what I think is the answer it is my fault if you get the answer wrong <3

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if you horizontally strech the quadratic parent function, f(x)=x^2, by a factor of 4, what is the equation of the new function?
max2010maxim [7]

Answer:

     g(x) = x^2/16

Step-by-step explanation:

To stretch a function horizontally by a factor of k, replace x with x/k.

You want a stretch factor of 4, so your function is ...

  g(x) = f(x/4) = (x/4)^2

  g(x) = x^2/16

__

The attached graph shows the horizontal stretch.

8 0
2 years ago
A painter earns $15 per hour.What is the minimum number of hours he must work to earn at least $200?
umka21 [38]

Let's represent h with the number of hours:

15h ≥ 200

h ≥ 200/15

h ≥ 40/3

h ≥ 13 1/3

He has to work at least 13 1/3 hours.

4 0
3 years ago
What’s the product of -4ab and 6b
mote1985 [20]
-24ab^2

Is the answer

Hope this helps.
7 0
2 years ago
Read 2 more answers
Isabella's dance classes 45 minutes long 20% of the time is spent stretching how many minutes does Isabella's spend stretching
Alina [70]

\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{20\% of 45}}{\left( \cfrac{20}{100} \right)45}\implies 9

4 0
2 years ago
Suppose that the travel time from your home to your office is normallydistributed with mean 40 minutes and standard deviation 7
Alex73 [517]

Answer:

The latest time that you should leave home is 12:08 PM

Step-by-step explanation:

Problems of normally distributed 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 = \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 problem, we have that:

\mu = 40, \sigma = 7

If you want tobe 95 percent certain that you will not be late for an office appointment at 1 P.M.,what is the latest time that you should leave home?

How many minutes is the 95th percentile of travel time?

it is X when Z has a pvalue of 0.95. So it is X when Z = 1.645. So

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

1.645 = \frac{X - 40}{7}

X - 40 = 7*1.645

X = 51.6

Rouding up, the 95th percentile for travel time is 52 minutes.

52 minutes before 1PM is 12:08 PM.

The latest time that you should leave home is 12:08 PM

7 0
3 years ago
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