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Leto [7]
3 years ago
13

Can someone help me fast please!!!!

Mathematics
1 answer:
allochka39001 [22]3 years ago
8 0

Answer:

Step-by-step explanation:

121=irrational

100= rational

99= irrational

10=rational

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How many positive integers less than 1000 (a) are divisible by 7? justify your answer?
mote1985 [20]
142. 

You can get this by seeing what number you have to multiply 7 by to get as close to 1000 as you can. 7*142 = 994. Thus each one of the multiplications up to that point will give you a positive integer than can be divided by 7. <span />
6 0
3 years ago
Each side of the equilateral triangle shown is 3 inches long. What is the height of the triangle?
rodikova [14]

•  measure of the side:   s = 3 in


You can find the height  h  by this formula:

          s · √3
h  =  ————
              2

          3 · √3
h  =  ————
              2

           3√3
h  =  ————  in     (exact value)
             2


Using  √3 ≈ 1.73,

           3 · 1.73
h  ≈  —————
                2

           5.19
h  ≈  ————
             2

h ≈ 2.60 in   (approximate value)


I hope this helps. =)

8 0
3 years ago
Read 2 more answers
Specifications call for the wall thickness of two-liter polycarbonate bottles to average 4.0 mils. A quality control engineer sa
bija089 [108]

Answer:

The null hypothesis μ=4.0 could not be rejected.

Step-by-step explanation:

In this problem we have to perform a hypothesis test of the mean, with s.d. of the population unknown.

The sample is: [3.999, 4.037, 4.116, 4.063, 3.969, 3.955, 4.091]

This sample has a mean of 4.033 and a standard deviation of 0.061.

The null and alternative hypothesis are:

H_0: \mu = 4.0\\\\H_1: \mu \neq 4.0

We assume a significance level of 0.05.

The test statistic for this test is:

t=\frac{M-\mu}{\sigma}=\frac{4.033-4.0}{0.061}=0.536

We have a sample size n=7, so the degrees of freedom are 7-1=6.

For a two-tailed test, t=0.536 and df=6, the P-value can be look up in a t-table.

The P-value is 0.61. Is greater than the significance level, so the effect is not significant and the null hypothesis can't be rejected.

8 0
3 years ago
A University of Florida study on drinking habits asks a random sample of students if they drink any alcohol when they party. We
denpristay [2]

Answer:

One proportion

Step-by-step explanation:

A proportion refers to a statement that two different ratios are equal. There are two ways It can be written: since two equal fractions a/b = c/d; or using a colon, a:b = c:d. in view of the fact that the cross products are of both equal to one hundred, we are aware that these ratios are equal and that this is a true proportion.

8 0
3 years ago
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Solve for X, show work PLS =)<br> ½(4x+2)=2x-4
marta [7]
4x+2=4x-8
2=-8
answer: no solutions
7 0
2 years ago
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