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3 years ago

Answer please brainliested

Mathematics

2 answers:

lorasvet [3.4K]3 years ago

6 0

Answer:

y=-x

Step-by-step explanation:

pashok25 [27]3 years ago

4 0

X 2 is the answer i gor

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One hundred people, ages 11-15, were randomly surveyed to find their opinion of their favorite leisure time activity. Sixty-four

Zanzabum

Answer:

If there are 1500 students in your school then 960 students would enjoy watching TV

Step-by-step explanation:

Step 1: We know that 64% of kids aged from 11 to 15 enjoy watching TV and there is 1500 students in your school

Step 2: We now want to find 64% of 1500, we can rewrite 64% as 0.64. We multiple 1500 by 0.64 to find out how many students enjoy watching TV

0.64 x 1500 = # of students who like watching TV

960 = # of students who like watching TV

Therefore out of 1500 students, 960 would enjoy watching TV

3 0

3 years ago

A sample of 1500 computer chips revealed that 37% of the chips fail in the first 1000 hours of their use. The company's promotio

andreyandreev [35.5K]

Answer:

$z=\frac{0.37 -0.39}{\sqrt{\frac{0.39(1-0.39)}{1500}}}=-1.59$

Step-by-step explanation:

Data given and notation

n=1500 represent the random sample taken

$\hat p=0.37$ estimated proportion of of chips fail in the first 100 hours

$p_o=0.39$ is the value that we want to test

$\alpha$ represent the significance level

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the actual percentage that fail is different from the stated percentage. Find the value of the test statistic.:

Null hypothesis: $p=0.39$

Alternative hypothesis: $p \neq 0.39$

When we conduct a proportion test we need to use the z statisitc, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.37 -0.39}{\sqrt{\frac{0.39(1-0.39)}{1500}}}=-1.59$

3 0

3 years ago

It costs $20 for 4 t shirts. Find the cost of 1 t shirt.

Natasha_Volkova [10]

20/4 = 5

$5 is the cost of 1 shirt.

3 0

3 years ago

Let a, b, c be the lengths of sides of a triangle; a=4.8, b=0.23, and c is a whole number. Find c.

BaLLatris [955]

$\sqrt{4.8 {}^2{ +0.23 {}^{2} } }$
If you solve it, the answer will be

C= 4.80

Seeing as its supposed to be a whole number, you will round up, so it will be 5

4 0

3 years ago

During the first year, ABC's stock starts at $100 and increases 100%. During the second year, its stock prices goes down 25% fro

frosja888 [35]

Answer:

$150

Step-by-step explanation:

$100 + 100% = $200 in the first year

$200 - 25% = $150 in the second year

4 0

4 years ago