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Sonja [21]
3 years ago
11

Please help!! There’s 2 questions, Explain step by step pls :)

Mathematics
1 answer:
schepotkina [342]3 years ago
8 0

Answer:

I'm late but the answer to the question on the left is 21 and the answer to the question on the right is 3.

Step-by-step explanation:

Remember that you have to complete the equations in order of PEMDAS.

19-3×4÷(-6)

For this equation, you would do 3×4 first (which equals 12) then divide that by -6 (Which equals - 2) and finally you would subtract that from 19. 19 - (-2)= 21

6(-8) / -12 - 1

For this equation you would do 6(-8) first (which equals -48) then divide that by -12 (which equals 4) and finally subtract 1 from that 4. 4-1=3

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The population of a city is expected to decrease by 6% next year. If x represents the current population, write an expression th
Kaylis [27]

Given:

Current population = x

The population of a city is expected to decrease by 6% next year.

To find:

The expression that represents the expected population next year. ​

Solution:

We have,

Current population = x

Decrease rate = 6%.

Expected population next year = Current population - 6% of Current population

                                                    =x-\dfrac{6}{100}x

                                                    =x-0.06x

                                                    =0.94x

Therefore, the expression for the expected population next year is 0.94x.

4 0
3 years ago
Suppose instead of comparing independent measurements taken from two groups, you used a matched-pairs experiment and one treatme
lina2011 [118]

You should use a T distribution to find the critical T value based on the level of confidence. The confidence level is often given to you directly. If not, then look for the significance level alpha and compute C = 1-alpha to get the confidence level. For instance, alpha = 0.05 means C = 1-0.05 = 0.95 = 95% confidence

Use either a table or a calculator to find the critical T value. When you find the critical value, assign it to the variable t.

Next, you'll compute the differences of each pair of values. Form a new column to keep everything organized. Sum everything in this new column to get the sum of the differences, which then you'll divide that by the sample size n to get the mean of the differences. Call this dbar (combination of d and xbar)

After that, you'll need the standard deviation of the differences. I recommend using a calculator to quickly find this. A spreadsheet program is also handy as well. Let sd be the standard deviation of the differences

The confidence interval is in the form (L, U)

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U = upper bound

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3 0
3 years ago
Which is different? Find "both" answers.
Alina [70]
B & C would be your answer because 3^-3 would turn into a fraction, 1/3^3 which is the same as C.
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3 years ago
Question Solve the equation. Check your solutions. ∣2x+1∣=∣3x−11∣
kirill [66]

Answer:

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Step-by-step explanation:

|2x+1| = |3x-11|

2x+1 = 3x-11

2x = 3x-12

-x = -12

x = 12

2x+1 = -(3x-11)

2x+1 = -3x+11

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6 0
3 years ago
Solve for x.<br><br><br> 2/3(x + 7) = 10
Delicious77 [7]

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4 0
3 years ago
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