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3 years ago

Evaluate 4x-3y, when x=2 and y=1

Mathematics

2 answers:

Lera25 [3.4K]3 years ago

6 0

4(2) - 3(1) =
8 - 3 = 5

Answer = 5

Korvikt [17]3 years ago

3 0

4x-3y
plug in the variables...
4(2)-3(1)
use the answers from those...
8-3
answer: 5

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MA_775_DIABLO [31]

Answer: C

It is C because when there is a line at the top of the number, it is infinite and repeats many times. That number in a shorter was can be written as a fraction over 990. Two of the answer choices has 990 in it which is letters B and C. This eliminates answer choices A and D. The number that is within the dot is your numerator (645) and 990 is your denominator. Overall the answer is 645/990

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3 years ago

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Work algebraically and you must show equation used and the work used to get your answers.

postnew [5]

Well, it is $\frac{-2}{25}$ . That is, the equation is $y=\frac{-2}{25}x+30$ . The run could be found when y=0, so $\frac{-2}{25}+30=0$ or $30=\frac{2}{25}x$ or $750=2x$ or $x=375$ . 375 inches. 30 feet means 360 inches, as far as I remember (in my country only metric systems are being used :) ) so it doesn't really work -- the ramp is just a bit too long.

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4 years ago

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On Monday, the high was 60oF. On Tuesday, the high was 10% more than Monday. Then on Wednesday, the temperature decrease by 8%.

Arada [10]

Answer:

60.72

Step-by-step explanation:

Monday: 60 degrees

Tuesday: temperature increases by 10 percent

60 + 10% of 60

60 + .10*60 = 70 +6 = 66

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4 years ago

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Can anyone solve 3?

Lynna [10]

9514 1404 393

Answer:

a) $7715.10

b) $6022.02

c) 15263.10

Step-by-step explanation:

A calculator or spreadsheet can evaluate the formulas for you using the given parameters.

The compound interest formula is ...

A = P(1 +r/n)^(nt)

where P is the principal amount, r is the annual rate, n is the number of times interest is compounded per year, and t is the number of years.

The continuously compounded interest formula is ...

A = Pe^(rt) . . . . where P, r, t are defined as above

Often the function e^x is defined as the exp(x) function.

A calculator or spreadsheet can perform rounding for you, but we elected not to confuse the issue with that step. The calculator results below are rounded in the answer list above.

For part (a), we have ignored the fact that 7 years will have an additional week, since there are 1 or 2 extra days (beyond 52 weeks) in each year. Taking that into account adds a penny to the account balance.

The extra day in a leap year affects the account balance in the 8th significant figure. Our balance has only 6 significant figures, so we do not need to be concerned with the effect of a possible leap year in the 3-year period of part (b).