3 years ago

Describe two methods for adding and subtracting linear expressions

1 answer:

8 0

Three main methods come to mind: Substitution method, Elimination method, Matrix row-reduction.The first two methods are taught in early grades in most high schools. Matrix row-reduction is taught in senior years in high school, or more likely, in the early years of a university math or science program.

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What is the slope of the line that passes through the points (4, 7) and (5,8)?

slava [35]

Answer:

Step-by-step explanation:

Use the coordinates of the points to determine the slope

slope = Δy/Δx = (8-7)/(5-4) = 1

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2 years ago

A car travels the 120 miles from A to B at 60 miles per hour, and then returns to A on the same road. If the average rate of the

inessss [21]

Outbound Trip 120 miles 60 mph equals 2 hours

Return Trip 120 miles

Total Trip 240 miles at 45 mph average speed

Total time = distance / rate = 240 / 45 = 5.3333333333 Hours

The return trip of 120 miles takes (5.3333333333 Hours MINUS 2 hours)

Return Trip Speed = 120 / 3.333333333 = 36 miles per hour

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3 years ago

Can I have help? With this it’s due today and it’s really hard high school level

Anna007 [38]

J=1

explaination:
2 is greater than or equal to 3
4 - j(1)= 3

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2 years ago

Read 2 more answers

How do you factor this in the form (x+b)(x+c)

faust18 [17]

So you have your polynomial. To factor this out, you need to find the factors of -45 that will add up to 3. These two factors would be -5 and 8. So, you have factored your polynomial! (x-5)(x+8). If you are still unsure, simply use the FOIL method to check and see if you get the same polynomial back. Hope this helps!

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3 years ago

Marvin has a vintage comic book worth $351. According to a dealer, the value of this particular comic book will increase by 12.1

White raven [17]

Y = 12.1% x 13 + 351
y= 0.012 x 13 + 351
y= 1.573 + 351
y= 352.573 or $352.6

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1 year ago