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3 years ago

Does anyone know this?

Mathematics

1 answer:

Bumek [7]3 years ago

7 0

Answer:

Step-by-step explanation:

Initial mean = 156, Changed mean = 163.92

So, mean increases. Only condition that satisfies this is B.

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1. 18 = -6/7h 2. -3/4x = 21/8x 3. -1/2z = 5/12

Harrizon [31]

Answer:

Don't understand the question

Step-by-step explanation:

5 0

2 years ago

Combine like terms in the expression 4k + 2k - k + 3. please help this is urgent

victus00 [196]

4k + 2k - k + 3

6k - 1k + 3

5k + 3

Answer: 5k + 3

3 0

2 years ago

Read 2 more answers

The cost of a High Definition television now averages $700, but the cost is decreasing about 15% per year. In how many years wil

Roman55 [17]

Answer: 7.7 years

Step-by-step explanation:

Given

The cost of HD TV is $700 and it is decreasing at the rate of 15% per year

After one year it becomes

$\Rightarrow 700-700\times 15\%\\\Rightarrow 700(1-0.15)$

after 2 year it becomes

$\Rightarrow 700(1-0.15)-700(1-0.15)\times 15\%\\\Rightarrow 700(1-0.15)(1-0.15)\\\Rightarrow 700(1-0.15)^2$

Suppose, after x years it becomes $200

$\Rightarrow 200=700(1-0.15)^x\\\\\Rightarrow \dfrac{2}{7}=0.85^x\\\\\text{Taking log both sides}\\\\\Rightarrow x=\dfrac{\ln (\frac{2}{7})}{\ln (0.85)}\\\\\Rightarrow x=7.7\ \text{years}$

Thus, it takes 7.7 years for the cost to come under $200.

3 0

3 years ago

A pizzeria charges $ 7.99 for a simple pizza. A customer can add ingredients for $ 0.79 each. If x represents the number of ingr

vodka [1.7K]

Step-by-step explanation:

7.99 = 2.37x

Because we will multiply 0.79 x 3 = 2.37

7 0

3 years ago

I REALLY NEED HELP ON 40 and 41, 50 POINTS

photoshop1234 [79]

Question 40 is D because from looking at the graph, its is symmetrical and the mean is the average, which usually the middle of the graph, so is the median. The median and mean would be within the 2.1-3 category because its the middle of the graph.

Question 41 is B because every pound is 16 ounces. If you multiply 16 and 12.5, you'll get 200.

3 0

3 years ago