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mrs_skeptik [129]
3 years ago
14

The principal of a high school spent 1700 for X desk each and Y chairs at $25 each if he had bought half the number of desk in t

wice the number of chairs he would have spent 1600 right to linear equation to represent the two conditions stated above
Mathematics
1 answer:
KatRina [158]3 years ago
6 0

Answer:

25X + 25Y = 1700

25X + 100Y = 3200

Step-by-step explanation:

Given that the principal of a high school spent $1700 for X desk and Y chairs at $25 each. Then, the equation will be

25X + 25Y = 1700 ....... (1)

If he had bought half the number of desk in twice the number of chairs he would have spent 1600. That is

25(X/2) + 25(2Y) = 1600

25X/2 + 50Y = 1600

Find the LCM and cross multiply

25X + 100Y = 3200 ........(2)

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Answer:

9c+2

Step-by-step explanation:

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3 years ago
If the cost of 10 tables is $750. Find the number of tables that can be purchased with $8250.
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Your answer is 110. You take 10 and divide it by 750. = 75 then you take 75. Divided 8250. = 110
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3 years ago
Write the equation of a line passing through (-4.3) and perpendicular to -6x + 4y =-12.
sergij07 [2.7K]

Answer:

y=-2/3*x+1/3

Step-by-step explanation:

-6x+4y=-12

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4y=6x-12

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3=(-2/3)*(-4)+b

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3 0
3 years ago
13. Given the following historical data and weights of .5, .3, and .2, what is the three-period weighted moving average forecast
Ostrovityanka [42]

Answer:

b. 144.8

Step-by-step explanation:

When calculating the moving average estimate of an observation , each of the observations are usually computed with the same weighted . In some cases, it is  beneficial to assign different  weight on the observations  such that the observation closer to the time period being forecast, has higher weight.  This is refer to as weighted moving average technique. The sum of the individual weight in a weighted moving average technique must equal to 1.

The three-period weighted moving average forecast for period 5 = 144*0.5 + 148 *0.3 + 142 *0.2 =  144.8

4 0
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The fraction could be represented by ( # of pages that typed / # of total pages that has to type).

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