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3 years ago

(4r2 – 3r + 2) – (-r2 – 3r) =

Mathematics

1 answer:

sasho [114]3 years ago

5 0

Answer:

5r^2+2

Step-by-step explanation:

(4r^2 – 3r + 2) – (-r^2 – 3r) =

Distribute the minus sign

(4r^2 – 3r + 2) +r^2 + 3r =

Combine like terms

(4r^2 + r^2 – 3r+ 3r + 2) =

5r^2+2

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2 years ago

The average reading score on certain tests is given by y = 0.153x + 255.4, where x is the number of years past 1970. In what yea

nirvana33 [79]

Average reading score is given by the expression,

y = 0.153x + 255.4

Here, x in the number of years past 1970.

To find the year in which the average reading score is 259.378, substitute the value of 'y' in the given expression.

y = 0.153x + 255.4

259.378 = 0.153(x) + 255.4

0.153x = 259.378 - 255.4

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That means given average reading score 259.378 will be 26 years after 1970.

Therefore, 1996 is the year in which the average reading score will be 259.378.

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2 years ago

Find the measure of the indicated angle.

marusya05 [52]

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the answer is 96°

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3 years ago

Here are the first five terms of a sequence.

Snezhnost [94]

Step-by-step explanation:

3 to 8= 5

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