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Rina8888 [55]
2 years ago
14

10. Jessica had dance class for 3 hours last night, Tiffany had dance class for of time that Jessica had dance class. How long d

id Tiffany have dance class?​
Mathematics
2 answers:
Stolb23 [73]2 years ago
5 0

Answer:

i think theres a typo somewhere

Step-by-step explanation:

Firlakuza [10]2 years ago
5 0

6 hours cause 2 * 3 is 6

You might be interested in
Literal Equations:
Anastasy [175]

Answer:

−c=d−r−a

Step-by-step explanation:

if we move a value to the other side of the equal sign, the value switches positive and negative signs, in this case A moved to the right, which caused it to turn negative.

5 0
2 years ago
Help!!! Algebra1B
Andreyy89

Answer:

3)  y = 2

Step-by-step explanation:

Step : 1

given 2 y-1 =3

Adding '1 ' on both sides, we get

2 y -1 +1 = 3+1

2 y = 4

dividing by '2' on both sides, we get

\frac{2y}{2} = \frac{4}{2}

cancelling '2' on both sides, we get

y = 2

7 0
3 years ago
The manufacturer of the ColorSmart-5000 television set claims 95 percent of its sets last at least five years without needing a
patriot [66]

Answer:

Step-by-step explanation:

Hello!

Your study variable is X: "number of ColorSmart-5000 that didn't need repairs after 5 years of use, in a sample of 390"

X~Bi (n;ρ)

ρ: population proportion of ColorSmart-5000 that didn't need repairs after 5 years of use. ρ = 0.95

n= 390

x= 303

sample proportion ^ρ: x/n = 303/390 = 0.776 ≅ 0.78

Applying the Central Limit Theorem you approximate the distribution of the sample proportion to normal to obtain the statistic to use.

You are asked to estimate the population proportion of televisions that didn't require repairs with a confidence interval, the formula is:

^ρ±Z_{1-\alpha /2}* √[(^ρ(1-^ρ))/n]

Z_{1-\alpha /2} = Z_{0.995} = 2.58

0.78±2.58* √[(0.78(1-0.78))/390]

0.0541

[0.726;0.834]

With a confidence level of 99% you'd expect that the interval [0.726;0.834] contains the true value of the proportion of ColorSmart-5000 that didn't need repairs after 5 years of use.

I hope it helps!

7 0
3 years ago
I got a question....... LOOK AT ATTACHMENT RIGHT ANSWERS ONLYYYY!!!
enyata [817]
Aw thanks ily too ʕ•ᴥ•ʔ
6 0
3 years ago
Read 2 more answers
What is the value of x in x2-3x=28
charle [14.2K]

Answer:

x=-28

Step-by-step explanation:

2x-3x=-1x so if -1x=28 divide both sides by -1 so x= -28

5 0
3 years ago
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