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deff fn [24]
3 years ago
5

Which expression is equivalent to -3- 3x–1 +x? O 2r-4 O-2r+ 4 •-2x- 4? O4-2x

Mathematics
1 answer:
Brums [2.3K]3 years ago
6 0
2r-4 is equivalent to-3 -3x —1
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*URGENT* (I'm sorry I just have a lot of problems with this math paper and it's due soon, it'll be such a help if you can answer
SashulF [63]
The two dinosaurs probably crossed paths at estimated coordinates (- 1, 2.5). 

To find where the two equations actually intersect, set them equal to each other. 

- 1/2x + 3 = 2x + 4

Subtract 4 from both sides, and add 1/2x to both sides to combine like terms.

2 1/2x = - 1 --> 5/2x = - 1

Multiply by 2/5 on both sides to isolate x

x = - 1(2/5)
x = - 2/5

Now plug in to either of the two equations. I used 2x + 4

- 1/2(- 2/5) + 3 = y
1/5 + 3 = y
y = 3 1/5


The actual coordinates where the dinosaurs crossed paths was (- 2/5, 3 and 1/5).

My original estimate was (- 1, 2 1/2) because based on the graph drawn above the point of interest (the intersection) appears to be below the third unit on the y-axis as well as in between the negative two unit and origin on the x-axis. My estimate was also off because the x-axis is counting by twos which does not necessarily allow for an accurate estimate strictly based on the naked eye. 
3 0
4 years ago
Which statement is sometimes true:
Lelu [443]

Answer:

4. A rectangle is a square

Step-by-step explanation:

A rectangle can be a square, but not always. A rectangle has 2 pairs of parallel sides, 2 pairs of congruent sides, and 4 right angles. Squares have 2 pairs of parallel sides, 4 congruent sides, and 4 right angles. So, the difference between the two is that adjacent sides are not necessarily congruent in rectangles, but they are in squares. This means that some rectangles can be a square. If a rectangle has all congruent sides, then it is a square. On the other hand, some rectangles do not have all congruent sides, and thus are not squares.

6 0
2 years ago
What is the value of 5/8 - 7/24? A. 11/12. B. 1/3. C. -1/8. D. -1/4
SCORPION-xisa [38]

Answer:

B. 1/3

Step-by-step explanation:

5/8-7/24=

15/24-7/24=

8/24=

1/3

3 0
3 years ago
Read 2 more answers
Which expression is equivalent to 9x – 3y – 5x + 7y + x + y? A. 5x2 + 4y2 B. 4x + 4y C. 5x + 5y D. 10xy
Zinaida [17]

9x – 3y – 5x + 7y + x + y

9x-5x+x -3y+7y+y

x(9-5+1) +y(-3+7+1)

5x+5y

Choice C

7 0
3 years ago
Read 2 more answers
Of all the peppers the chef has 5/7 are red and the rest are green. The chef has a total of 34 green peppers. How many peppers d
Oksana_A [137]
There are 119 peppers together
3 0
4 years ago
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