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bogdanovich [222]

3 years ago

8

The function j(x)= 39x represents the number of jumping jacks (x) you can do in x minutes . How many jumping jacks can you do in

5 minutes?

2 answers:

9966 [12]3 years ago

8 0

Put x=5 in above function. J(x)= 39x. J(5) = 39x5 = 195.

oksano4ka [1.4K]3 years ago

4 0

Place x=5 in above function. J(x)= 39x. J(5) = 39x5 = 195.

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I need help please don't know this

SashulF [63]

Answer:

9 is the right answer

Step-by-step explanation:

I. If c = - 4 and d = 10

then $\frac{1}{4}(-4^{3} + 10^{2} )$

= $\frac{1}{4}(-64 + 100)$

= $\frac{1}{4}(36)$

= 9

Hope that help :D

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3 years ago

(10 points for the answer)<br><br> y=

Nat2105 [25]

Answer: y=1x+4
Solving Steps:

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3 years ago

Figure one and figure 2 are similar quadrilaterals. Which proportion must be true?

amm1812

Step-by-step explanation:

option C is the correct answer of this question

5 0

3 years ago

Assoli18 [71]

B)-3 for the vertex, do u have to graph it?

4 0

3 years ago

The General Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours

DerKrebs [107]

Answer:

Yes, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66

Step-by-step explanation:

H0 : σ² = 2.66²

H1 : σ² < 2.66²

X²c = (n - 1)*s² ÷ σ²

sample size, n = 40

Sample standard deviation, s = 1.9

X²c = ((40 - 1) * 1.9²) ÷ 2.66²

X²c = 140.79 ÷ 7.0756

X²c = 19.897

Using a confidence level of 95%

Degree of freedom, df = n - 1 ; df = 40 - 1 = 39

The critical value using the chi distribution table is 25.6954

Comparing the test statistic with the critical value :

19.897 < 25.6954

Test statistic < Critical value ; Reject the Null

Hence, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66

8 0

3 years ago