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1 year ago

If x = 8 and y = -3, evaluate the following expression: 20 - 5y + 2x

Mathematics

1 answer:

solniwko [45]1 year ago

8 0

Answer:

Step-by-step explanation:

Given the following question:

$20-5y+2x$
$x=8$
$y=-3$

Substitute and solve using PEMDAS:

$20-5y+2x$
$20-5(-3)+2(8)$
$5\times-3=-15$
$20--15+2(8)$
$2\times8=16$
$20-(-15)+16$
$20--15=35$
$35+16=51$
$=51$

Your answer is "51."

Hope this helps.

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Answer:

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Step-by-step explanation:

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3 years ago

I have a slope of -4 (m=-4), would that be negative four over positive one or would that be negative 4 over negative one?

katrin [286]

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2 years ago

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babymother [125]

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2 years ago

In 1985, there were 285 cell phone subscribers in Arlington. The number of subscribers increased by 75% per year since 1985. Fin

ANTONII [103]

Answer:

The number of subscribers in 2008 is 110,845,988

Step-by-step explanation:

The number of cell phone subscribers in Arlington, in t years after 1985, can be modeled by the following equation.

$N(t) = N(0)(1+r)^{t}$

And which N(0) is the number of subscribers in 1985 and r is the rate it increases per year, as a decimal.

In 1985, there were 285 cell phone subscribers in Arlington.

This means that $N(0) = 285$

The number of subscribers increased by 75% per year since 1985.

This means that $r = 0.75$

$N(t) = 285(1.75)^{t}$

Find the number of subscribers in 2008.

2008 is 2008-1985 = 23 years after 1985. So we have to find N(23).

$N(23) = 285(1.75)^{23} = 110,845,988$

The number of subscribers in 2008 is 110,845,988

8 0

2 years ago

Please show work and help me pls

Gekata [30.6K]

Answer:

The answer is 207.

Step-by-step explanation:

If you do 1 ÷ 3 you'd get 3. Then move on too the 1 in 3105. 1 ÷ 1 equals 1. You do that with the 0 and the 5 in 3105. The last step too do is is do the same thing with the 5 in 15. Such as, 5 ÷ 3, 5 ÷ 1, 5 ÷ 0, and lastly 5 ÷ 5. Now if you understand just divide the two numbers in 15, which are 1 and 5 to get the quotient in the division problem. Hope this helps, I'm not the greatest at explaining!

7 0

3 years ago

If x = 8 and y = -3, evaluate the following expression: 20 - 5y + 2x​

If x = 8 and y = -3, evaluate the following expression: 20 - 5y + 2x