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posledela
3 years ago
11

Multiply the polynomials. (4x^2 + 3z + 7)(8x - 5)

Mathematics
2 answers:
Vedmedyk [2.9K]3 years ago
8 0

Answer:

32x3−20x2+24xz+56x−15z−35

Step-by-step explanation:

aivan3 [116]3 years ago
7 0
32x^3-20x^2+24xz-15z+56x-35 is the answer to your question!!
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Of 136 randomly selected adults, 33 were found to have high blood pressure. Construct a 95% confidence interval for the true of
navik [9.2K]

Answer:

The 95% confidence interval of the proportion of all adults that have high blood pressure is 0.17059 < \hat{p} < 0.314695

Step-by-step explanation:

The confidence interval for a proportion is given by the following formula;

CI=\hat{p}\pm z\times \sqrt{\frac{\hat{p}(1-\hat{p})}{n}}

Where:

x = 33

n = 136

\hat{p} = x/n = 33/136 = 0.243

z value for 95% confidence is 1.96

Plugging in the values, we have;

CI=0.243\pm 1.96\times \sqrt{\frac{0.243(1-0.243)}{136}}

Which gives;

0.17059 < \hat{p} < 0.314695

Hence the 95% confidence interval of the proportion of all adults that have high blood pressure = 0.17059 < \hat{p} < 0.314695

From the above we have;

23.2 < x < 42.798

Since we are dealing with people, we round down as follows;

23 < x < 42.

4 0
3 years ago
Which equation can be used to solve the following word problem? Seth has 8 more nickels than dimes, and the total value of his c
9966 [12]

Answer:

Seth has 21 nickels

Step-by-step explanation:

Let n represent the number of nickels. Since Seth has 8 more nickels than dimes, then (n-8) is the number dimes.

Nickel is worth 5 cents and dime is worth 10 cents.  Thus, n nickels are worth 5n cents and (n-8) dimes are worth 10(n-8) cents. The total value of Seth's coins is $2.35 that is 235 cents, then

5n+10(n-8)=235.

Solve this equation:

5n+10n-80=235,\\ \\15n=235+80,\\ \\15n=315,\\ \\n=21.

6 0
3 years ago
What is the measure of XYZ?<br> A. 75°<br> B. 33<br> C. 54<br> D. 108
Oliga [24]
It's D. 108 • ___________
4 0
2 years ago
Read 2 more answers
Cassie spends 2/3 of her money on supplies. Cassie spends her remaining money on 3 sandwiches. Each sandwich costs $5.25. How mu
Irina18 [472]
In words:
Three sandwiches, each costing $5.25, equals 1/3 of Cassie's total money

We can write the formula:

(5.25*3)=1/3x

Now solve:

15.75=1/3x
3(15.75)=x
x=$47.25
Hope this helps!!
3 0
3 years ago
Read 2 more answers
3times4 dividend by6 plus 2
miskamm [114]

The correct answer is <u><em>3*4=12/6=2+2=4</em></u>

<u><em>Your answer is 4</em></u>

4 0
3 years ago
Read 2 more answers
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