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3 years ago

Evaluate the expression for x=2 and y=4. (x5y?)/(x3y5)

Mathematics

1 answer:

Step2247 [10]3 years ago

5 0

Answer:

(2 x 5 x 5) / (2 x 3 x 4 x 5)

=40/120

= 4/12

= 1/3

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PLEASE HELP WITH ANSWER ITS DUE TOMORROW

OleMash [197]

Answer:

A: 46 meters at 3 seconds

B: 0 meters at 6.033 seconds

C. It depends where the tree is

D. 6.033 seconds

Step-by-step explanation:

A. To find max height, we need to find the vertex.

We can do this by using vertex from y=a(x-h)+k for y=a^2+b^2+c^2

h(t) = -5t^2+30t+1

h(t)+45 = - 5x^2+30x+45+1

h(t)+45= -5(x^2-6x-9)+1

h(t)+45 = -5(x-3)^2+1

h(t) = -5(x-3)^2+46

Hence, the max height is 46 at 3 seconds

B. The minimum height is 0 meters because of the problem

C. It depends because the parabola intersects x=10 in 2 places meaning that you need the tree to be in either of these two places to intercept the horseshoe

D. -5x^2+30x+1=0

5x^2-30x-1=0

x= (30+-sqrt(30^2-4*5*-1))/2*5

x=(30+-sqrt920)/10

x=3+-2sqrt230/10

x=3+-sqrt230/5

This means that x = -0.033 or 6.033. Negative value doesn't make sense so it's 6.033 seconds

6 0

3 years ago

25. Estimate the answer by rounding each number to its greatest place: 199 x 91

ycow [4]

The answer would be 18,000.

7 0

3 years ago

Read 2 more answers

Y ≥ 12x – 1<br> y < 43x – 2

kondaur [170]

Answer:

Step-by-step explanation:

The solution to this problem is a graph.

Graph y ≥ 12x - 1: this is a straight solid line with slope 12 and y-intercept -1. Due to the presence of the ≥ operator, we must shade (darken) the entire area above this line.

Next, graph y < 43x – 2 using a dashed line (due to the < operator): The slope is 43 and the y-intercept is -2.

Determine where the two lines intersect, either from the graph or algebraically. If algebraically:

equate the two givens:

y = 12x - 1 = y = 43x – 2, which simplifies first to:

12x - 1 = 43x - 2, and second to

1 = 43x - 12x = 31x, which results in x = 1/31.

Substituting 1/31 for x in the first equation, we get:

y = 12(1/31) - 1, or y = 12/31 - 1, or y = 12/31 - 31/31, or y = 19/31

The two graphs intersect at (1/31, 19/31)

Shade (darken) the area beneath (under) the dashed line y < 43x – 2.

The solution is the area that you have darkened twice.

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3 years ago

Show two ways to simplify 112 over 220

MakcuM [25]

First way 56/110
Second Way 28/55

5 0

4 years ago

Read 2 more answers

A herd of 1,500 steer was fed a special high‐protein grain for a month. A random sample of 29 were weighed and had gained an ave

Marianna [84]

By formula we know that:

z (x) = (x - m) / [sd / sqrt (n)]

where x is the value we want to know (6.7), m is the mean (5), sd is the standard deviation (7.1) and n is the sample size (29).

Replacing we have:

z (6.7) = (6.7 - 5) / [7.1 / sqrt (29)]

z = 1.289

If we look in the normal distribution table (attached), we have that the probability is 0.8997, therefore:

1 - 0.8897 = 0.1003

So the conditional probability of a herd sample earning at least 6.7 pounds per steer is 10.03%.

Now the hypothesis tells me:

m> 5

The probability is somewhat low, therefore, the most correct thing is to reject the hypothesis even though it is a fact that can occur.

4 0

3 years ago