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crimeas [40]
3 years ago
15

20. Determine the rate of change for the following equation on the given interval.

Mathematics
2 answers:
professor190 [17]3 years ago
7 0
The equation is of a line so the rate of change is the same all along it. The rate of change is just the slope of the line = 2.
BigorU [14]3 years ago
4 0
-2<x<3   | *2
-4<2x<6       | +7
3< 2x+7< 13


3<10<13

The answer is C

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Solve the system <br> 5x+3y=-9 &amp;- 2x+y=8
lianna [129]
5x+3y=-9
-2x+y=8

The first step is the trickery (and quite frankly, hardest to explain) part. You need to multiply one equation by a number that will create one variable to be the negative version of the other...(Confusing, right? Don't worry, I'll show you)

We are going to solve for X first.

We will multiply the second equation by -3
5x+3y=-9
-3(-2x+y)=(-3)8

Now simplify:
5x+3y= -9
6x-3y= -24

Now combine the two equations (add them together)
11x= -33
Divide by 11
X=-3

Now plug X in to one of the first equations:
5(-3)+3y= -9
-15+3y =-9
3Y= 6
Y= 2


So your final answer is:
x= -3
Y= 2

Hope this helps!
3 0
3 years ago
Read 2 more answers
A large software company gives job applicants a test of programming ability, and the mean for that test has been 160 in the past
Anastaziya [24]

Answer:

Since the computed value of t=  0.833 does not fall in the critical region we therefore do not reject H0 and may conclude that population mean is greater than 160. Or the sample comes from population with mean of 165.

Step-by-step explanation:

  1. State the null and alternative hypothesis as

H0: μ= 160 against the claim Ha :μ ≠160

Sample mean = x`=  165

Sample standard deviation= Sd= 12

2.  The test statistic to use is

t= x`-μ/sd/√n

which if H0 is true , has t distribution with n-1 = 36-1= 35 degrees of freedom

3. The critical region is t< t (0.025(35)= 2.0306

t= x`-μ/sd/√n

4. t = (165-160)/[12/√(36)] = 5/[6] = 0.833

5. Since the computed value of t=  0.833 does not fall in the critical region we therefore do not reject H0 and may conclude that population mean is greater than 160. Or the sample comes from population with mean of 165.

Now

6. The p-value is 0 .410326 for  t= 0.8333 with 35 degrees of freedom.

6 0
2 years ago
You flip a nickel 100 times and record your results: 35 heads and 65 tails. From your experimental data, what is the probability
musickatia [10]
Out of 100 flips, the nickel landed on tails 65 times.

P(tails)=65/100 or 0.65 or 65%

Answer 65%
4 0
3 years ago
Read 2 more answers
PLEASE HELP!!! You must show your work to receive credit for this item.
Natalka [10]
The answer to this question is 12
8 0
3 years ago
The length of a rectangular garden is 7 feet longer than its width. The perimeter of the garden is 38 feet. Find the width and l
Blizzard [7]
38=2(2w+7)
19=2w+7
12=2w

w=6
l=13

5 0
3 years ago
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