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blsea [12.9K]
2 years ago
13

Pls HELP AND EXPLAIN BRAINLIEST AND 15 POINTS

Mathematics
1 answer:
zhuklara [117]2 years ago
7 0
The first one is 7.4 . 39/5=7 and 4 change so 7.4 . The second one is 1.67 . 5/3 is 1.6 repeated and rounded to the nearest houndredth is 1.67
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How many solutions does this system have?<br> x + y = 6<br> y = -X – 1
White raven [17]

Answer:

x + y = 6 and y = -x – 1 = (no solutions exist)

Step-by-step explanation:

8 0
4 years ago
2x-y=6<br><br> Rewrite in Slope-intercept form
Nutka1998 [239]

Answer:

y = 2x - 6

Step-by-step explanation:

subtract 2x from each side to get:

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5 0
3 years ago
Use this information to answers Questions 1 through 7. The U.S. government provides money to each state to maintain the intersta
vladimir2022 [97]

Answer:

1. Null Hypothesis, H_0 : \mu \leq  70 mph

  Alternate Hypothesis<u>,</u> H_A : \mu > 70 mph

2. Value of test statistics is 2.652.

Step-by-step explanation:

We are given that Kansas Highway Patrol recorded the speed of 450 interstate vehicles and found the mean speed of 70.2 mph with standard deviation 1.6 mph.

We have to conduct a hypothesis test at significance level 0.01 to decide whether or not to reduce the money sent to Kansas.

<em><u>Let </u></em>\mu<em><u> = true mean speed of all vehicles on the Kansas interstate highway system.</u></em>

SO, <u>Null Hypothesis</u>, H_0 : \mu \leq  70 mph   {means that the federal government will not reduce the amount of funding it provides as the speed limit is less than or equal to 70 mph}

<u>Alternate Hypothesis,</u> H_A : \mu > 70 mph   {means that the federal government will reduce the amount of funding it provides as the speed limit exceed 70 mph}

The test statistics that will be used here is <u>One-sample t test statistics</u> as we don't know about the population standard deviation;

                        T.S.  = \frac{\bar X -\mu}{\frac{s}{\sqrt{n} } }  ~ t_n_-_1

where, \bar X = sample mean speed limit of 450 interstate vehicles = 70.2 mph

             s = sample standard deviation = 1.6 mph

             n = sample of vehicles = 450

So, <em><u>test statistics</u></em>  =   \frac{70.2-70}{\frac{1.6}{\sqrt{450} } }  ~ t_4_4_9

                               =  2.652

<u><em>Hence, the value of test statistics is 2.652.</em></u>

5 0
3 years ago
Uhm I need help hello
tresset_1 [31]

Answer: THE ANSWER IS B

:

4 0
3 years ago
Read 2 more answers
Can people please help me on this
PtichkaEL [24]

the answer will be D

5 0
3 years ago
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