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asambeis [7]
3 years ago
5

Please help me with i ii iii Step by step

Mathematics
2 answers:
viva [34]3 years ago
8 0
.3 (15x+9)/3
(15x/3)+(9/3)
5x+(9/3)
5x+3
1. 4(3x+2y)-5(3x+4y)
12x+8y-5(3x+4y)
12x+8y-15x-20y
-3x+8y-20y
-3x-12y
-3(x+4y)
2. 3k+3m-2-6k-3m-2n
-3k+3m-2-3m-2n
-3k-2n-2
UkoKoshka [18]3 years ago
7 0

(i) I used distributive property to get the x’s and y’s out of parentheses. I then combined like-terms to simplify until I could do no more. That is your final answer for (i) is -3x - 12y

(ii) This one is similar to the first one, just with no parentheses. I combined like terms again until not like terms were left. Your final answer for (ii) is -3k -2 -2n

(iii) I started by dividing 15 by 3 and got 5, and because the 15 had an x to it, you get 5x. I then moved onto the next term, 9. 9 divided by 3, to get 3. Your final answer for (iii) is 5x + 3

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8. The graph below shows a dashed line on a coordinate plane. A right triangle is drawn so
Evgesh-ka [11]

Answer:

Option 2

Step-by-step explanation:

First, find the slope of the line of the graph using the points given as (5, -3) and (13, -9):

slope = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-9 -(-3)}{13 - 5} = \frac{-6}{8} = -\frac{3}{4}

Any of the triangle in the options given, whose opp side has the same slope value of -¾, is the triangle we are looking for.

Option 1: slope between the points (0, 2) and (3, -2).

slope = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-2 - 2}{3 - 0} = \frac{-4}{3}

Option 2: slope between the point (-7, 6) and (-3, 3).

slope = \frac{y_2 - y_1}{x_2 - x_1} = \frac{3 - 6}{-3 -(-7)} = \frac{-3}{4}

Option 2 has the same slope as the one given in the graph. This is the answer.

Option 3: slope between the points (5, -1) and (2, -5).

slope = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-5 -(-1)}{2 - 5} = \frac{-4}{-3} = \frac{4}{3}

Option 4: slope between the points (2, -7) and (6, -4).

slope = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-4 -(-7)}{6 - 2} = \frac{3}{4} = \frac{3}{4}

The answer is Option 2

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2 years ago
David did not have time to wait for the elevator on the first floor of the building so he decided to go up the stairs. If it too
amm1812

Answer:

6 minutes

Step-by-step explanation:

so it took him 2 mins from floor 1 to 3 then another to 3 to 6 so now it's been 4 mins then 6 to 9 is another 2 mins and that equals 6 minutes

6 0
3 years ago
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