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Sonbull [250]
3 years ago
9

The sum of two numbers is 30 and their difference is 12

Mathematics
1 answer:
Elina [12.6K]3 years ago
6 0
The correct answer is 21 and 9. 21+9=30 and 21-9=12. Hope this helps.
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Find the critical value t for the confidence level c= 0.98 and sample size n=7.
kenny6666 [7]

Answer:

The critical value is T = 3.143.

Step-by-step explanation:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 7 - 1 = 6

98% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 6 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.98}{2} = 0.99. So we have T = 3.143.

The critical value is T = 3.143.

8 0
3 years ago
One-fourth of the sum of 6 and 2 times cis 3​
lidiya [134]
3/4 that really helpssssssss
7 0
2 years ago
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Please help me slove this problem <br> 3x - 3 = 12
allsm [11]
The answer is 5! Hope this helps!
8 0
3 years ago
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There are 1500 bees in a colony. Each month, the number of bees decreases by 12%. There are 800 flowering plants in a garden. Ea
Evgen [1.6K]
 So the answer to this question is:

A= bees: f(t) = 1500 × (0.88)∧t

 plants: g(t) = 800 - 25×t

B: (Bees) 1500 × (0.88)∧6= 696.60
After 6 months (696 bees ):
800 - 25×6 = 650 (Flowering Plants)
After 6 months:

650 flowering plants

C: 1500 × (0.88)∧t=800 - 25×t
t = 6.779965672

Answer is it will take 7 months or 6 for the bees and the plants.
Hope this helps!




4 0
3 years ago
HELP. How do i convert $1.34 into a percent %
Lelechka [254]
Ok. So, say you have 1 whole. If you take half of that it would be 50% or 0.50 of the whole. So with 1.34 you can turn it into 1 and 0.34. You have one whole, so that is 100 percent. You than add the 34 hundredths which is 34 percent. So you have 134%. Do you understand all that?
7 0
3 years ago
Read 2 more answers
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