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vladimir1956 [14]
2 years ago
15

PLEASE HELP I NEED THE ANSWER

Mathematics
1 answer:
bazaltina [42]2 years ago
5 0
I don’t understand this
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Is (-4, 2) a solution of 2x - 5y = 10?
Novosadov [1.4K]

Answer:

no

Step-by-step explanation:

2*(-4) -5*2 = -8-10 = -18

6 0
4 years ago
A 23% increase followed by a 17% decrease is what percent change?
AVprozaik [17]
A 2.09% increase.

This is just some simple multiplication. A 23% increase is the same as multiplying by 1.23, and a 17% decrease is like multiplying by 0.83, since 100-17=83. Just multiply 1.23*0.83, which equals 1.0209, or a 2.09% increase.
7 0
3 years ago
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Daniela bought 132 unicorn toys from the store. She then bought 231 minion toys. About how many toys does she have altogether? (
ASHA 777 [7]

Answer:

The answer would be 363 but if u would round that answer to nearest hundred then it’s 400

Step-by-step explanation:


7 0
3 years ago
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Which exponential function has a growth factor of One-half?
Gemiola [76]

Answer:

An exponential function with a growth factor of 1/2 would have 1.5^x as part of it.

The exponential growth function is as follows.

r is the rate of growth (0.50)

3 0
2 years ago
The side length of aDavid is a statistician. He has a sample size of 40 (which he cannot change). What element of his hypothesis
Sergeeva-Olga [200]

Answer: D) the significance level of the test

=======================================================

Explanation:

The significance level of the test, also known as "alpha", is the probability of making a type 1 error. A type 1 error is where you reject the null hypothesis but it was true all along.

The null hypothesis is where we test a certain probability distribution (eg: normal distribution). Specifically we gather a sample of values and compute the test statistic. If the probability of getting that test statistic or more extreme is smaller than alpha, then we reject the null. This probability value is known as the p-value.

If you lower the alpha value, then that will make it more likely you do not reject the null. Consider an example where alpha = 0.10 to start with. If you get a p-value of 0.02, then you would reject the null. The same would apply for alpha = 0.05; however, with alpha = 0.01, the p-value is no longer smaller than alpha. At this point we do not reject the null. Your textbook may use the phrasing "fail to reject the null".

Going in the opposite direction, increasing the alpha value will make it more likely to reject the null. Each time you adjust the alpha value, keep the p-value to some fixed number (between 0 and 1).

6 0
3 years ago
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