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Oduvanchick [21]
3 years ago
9

Need help nadding and subtracting functions

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
3 0

Answer:

2x² + \frac{3}{2} x - 5

Step-by-step explanation:

(f + g)(x) = f(x) + g(x), thus

f(x) + g(x)

= \frac{x}{2} - 2 + 2x² + x - 3 ← collect like terms

= 2x² + \frac{3}{2} x - 5

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I need a little help with my math problem.
coldgirl [10]
To make any meaningful calculations here, you'll have to think about how the area of each room is calculated, as well as to invent how much per square yard the various types of carpeting cost.

Note that the cost of carpeting one room would be (room area)(carpet cost per square foot).


3 0
3 years ago
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Researchers are interested in determining whether more men than women prefer Coca Cola to Pepsi. In a random sample of 300 men,
kobusy [5.1K]

Answer: 0.17 ± 0.096

Step-by-step explanation:

Confidence interval for difference between the population proportion :

p_1-p_2\pm z^*\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}

, where p_1 = sample proportion for population 1.

 p_2 = sample proportion for population 2.

n_1 = Sample size from population 1.

n_2 = Sample size from population 1.

As per given , we have

Population

p_1=0.65\ \ \& \ \ p_2=0.48

n_1=300\ \ \ \&\ \ n_2=400

Critical z-value for 99% confidence level is z*=2.576  [By z-table]

Now , the 99% confidence interval estimate for the difference between the percentages of men and women who prefer Coca Cola over Pepsi :

(0.65-0.48)\pm (2.576)\sqrt{\dfrac{(0.65)(1-0.65)}{300}+\dfrac{(0.48)(1-0.48)}{400}}\\\\= 0.17\pm(2.576)\sqrt{0.0007583+0.000624}\\\\=0.17\pm(2.576)\sqrt{0.0013823}\\\\=0.17\pm(2.576)(0.03718)\\\\=0.17\pm0.09577568\\\\\approx0.17\pm0.096\

Hence, the correct answer is 0.17 ± 0.096.

6 0
3 years ago
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Will pick brainliest. How would I do this?
-Dominant- [34]

Undefined

Order of matrix Q is 4 by 3

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7 0
3 years ago
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Find the ratio of 125gm:2kg​
Kruka [31]

Step-by-step explanation:

Convert kilogram into gram first.

1 kg = 1000g

2kg = 1000 \times 2 \\  = 2000

a:b = a/b

125:2000= 125/2000

If u divide u get

1/16

a:b = a/b

1/16= 1:16

Ratio is now found.

7 0
3 years ago
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Its -8,2 text me if you want to know why
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