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solong [7]
3 years ago
12

4. Simplify the expression:

Mathematics
1 answer:
Natalija [7]3 years ago
3 0

Answer:

<h2>A. 2x² + 5x + 1</h2>

Step-by-step explanation:

7x^2-6+4x+7-5x^2+x\qquad\text{combine like terms}\\\\=(7x^2-5x^2)+(4x+x)+(-6+7)\\\\=2x^2+5x+1

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h = -16t^2 + 32t + 12
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3 years ago
Fractions greater than one 7-4
Oksana_A [137]
N > 1/3
n = 1/4

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3 years ago
Read 2 more answers
Solve the equation by Square Root Method 16n^2-25=0
Anton [14]

Answer:

Step-by-step explanation:

16n^2-25=0

16n^2=25

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Can somebody help me with this math problem?
skad [1K]

Answer:

B) Rational, not an integer.

Step-by-step explanation:

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7 0
3 years ago
A poll found that 53% of a sample of 1170 teens in a certain large country go online several times a day. (Treat this sample as
posledela

Answer:(a) margin error = 2.4%

(b) The margin error gives the measure in percentage of how the population parameter determined differ from the real population statistics or value.

(c) in 90% of the samples of teens in the country, the percent who go online several times a day will be within 50.6% and 55.4%. of the estimated 100%

Step-by-step explanation:

Using the proportion formulae

Margin error = z √p(1-p)/n

n= 1170, p = 53% = 0.53, 1-p = 0.47

and the z value at 90% C.I = 1.645

M error= 1.645 √0.53×0.47/1170

Margin error = 0.024 = 0.024 ×100

Margin error = 2.4%

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In other words 90% of the time: the number of teens who go online several time a day will be between 50.6 and 55.4%.

8 0
3 years ago
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