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masya89 [10]
3 years ago
15

Need help with this (Show work pls!!)

Mathematics
1 answer:
weeeeeb [17]3 years ago
5 0

Answer:

It will take 7 hours for car B to catch up to Car A.

Step-by-step explanation:

So if you write the the two equations out:

Car A=70x\\Car B= 90x-140

You'll want to assume that x is how many hours and y is how many km.

The reason car B has, -140, is because car A is in front of it by two hours and in those two hours it reached 140km. Meaning that Car B is starting at 140 km behind Car A.

If you graph these two equations out you'll realize that they intersect at the point (7, 490). Meaning that Car B caught up with Car A after 7 hours and both cars had traveled 490km.

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⦁ Use both methods to find the distance between the points on the number line.
Vitek1552 [10]

Answer:

4 and 4

Step-by-step explanation:

Method A

1) Method A: Let 2 be the starting point and -2, the finishing one. Counting between 2 and -2, we can count a distance of 4 units. That's the simplest way, but not convenient to great numbers on the Number Line.

Method B:

There is no such thing as a negative distance, as a physical quantity. So this is the reason why we need to compute the absolute value of two numbers, which is simply what was done on Method B.

|2-(-2)|=|4|=4

As we are dealing with absolute values, the order is not relevant after all, the result remains the same. Take a look:

|-2-2|=|-4|=4

That's why the greater (2) or the lesser number (-2) can be the subtrahend (in bold within the brackets.

3 0
3 years ago
I may be like 12 weeks in, but I still need help with coefficients and what they are. (Btw my state does NOT use common core met
STatiana [176]

Answer:

They are any number in front of a variable so like 4x 7y or 8z. 4, 7 and 8 are the coefficients. A number by itself is a constant. For example 3, 1 and 9 are constants.



6 0
3 years ago
Read 2 more answers
Robin has 3 feet of ribbon. She uses part of it for a craft and has 2.5 feet left. She divides the 2.5 remaining feet among her
madreJ [45]
0.25 Feet for each friend because 2.5/10=0.25
5 0
3 years ago
What is the slope of the line passing through the points (5,7) and (−1,19)?
N76 [4]
The slope is -2..........
6 0
3 years ago
Read 2 more answers
If (1/a)+(1/b)=10 what is the value of a+b?
Goshia [24]
B) 2/5 

I think, if a and b are the same (coz then they would both equal 0.2)
3 0
3 years ago
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