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SOVA2 [1]
2 years ago
6

Keith tutors history. For each hour that he tutors, he earns 20 dollars. His earnings, E (in dollars), after tutoring for h hour

s is given by the following function.
E(h) = 20h
How much does Keith earn if he tutors for 4 hours?
Mathematics
2 answers:
ohaa [14]2 years ago
4 0
E(4)= 20(4) = 80
hope this helps
Cloud [144]2 years ago
4 0

Answer:

4 20x is 80 so he can earn 80 bucks in 4 hours

Step-by-step explanation:

<3

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Answer: 85

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3 years ago
Leslie is a biologist. She is going to randomly select one animal from her lab to study. There are 5 salamanders, 3 crayfish, an
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5/20 but if you were to simplify it then 1/4
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Suppose that several insurance companies conduct a survey. They randomly surveyed 350 drivers and found that 280 claimed to alwa
KATRIN_1 [288]

Answer:

Lower limit = 0.76

Upper limit = 0.84

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 350

Number of drivers that buckle = 280

Formula:

p' = \dfrac{x}{n} = \dfrac{280}{350} = 0.8

q' = 1-p' = 1 - 0.8 = 0.2

The standard deviation for sp =

=\sqrt{\displaystyle\frac{p'q'}{n}}\\\\=\sqrt{\dfrac{0.8\times 0.2}{350}} = 0.02138

95% Confidence Interval:

p' \pm z_{critical}(s_p)

z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96

Putting the values, we get,

0.8 \pm 1.96(0.02138)\\= 0.8 \pm 0.0419048\\=(0.7580952, 0.8419048)\\\approx (0.76,0.84)

Lower limit = 0.76

Upper limit = 0.84

3 0
3 years ago
To icrease an amount by 35% what single multiplier would u use
Pie
You would take your number, let's use 55, and multiply it by 0.35. 

55 x 0.35 = 20.25

Then add that answer to your original number.

55 + 20.25 = 75.25

Your answer is 17.25.
3 0
3 years ago
Solve for x. Write the smaller solution first, and the larger solution second. (x-10)^2-1=0
ikadub [295]

Answer:

x_1 = 9 and x_2 = 11.

Step-by-step explanation:

Start by adding 1 to both sides of this equation.

(x - 10)^{2} = 1.

The square of what number or numbers will lead to the number "1"? It turns out that not only 1^{2} = 1, but (-1)^{2}= 1 as well. In other words, the value (x - 10) can be either 1 or -1. Either way, the equation is still going to hold. That's the reason why there are two solutions to this equation.

Consider the case when x - 10 = 1. Add 10 to both sides of the equation. x = 11.

Now, consider the case when x - 10 = -1. Again, add 10 to both sides of the equation, x = 9.

Order the two solutions in an increasing order:

  • x_1 = 9,
  • x_2 = 11.
4 0
3 years ago
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