Answer:
9
Step-by-step explanation:
This is because 21/7 is 3. So, you use the scale factor of 3 to divide 27/3 to get x which is 9.
0.5kg is the same as 500g.
Let x = the unknown cost of 300g. We will use this to set up a proportion and crossmultiply.
Now crossmultiply and solve for x.
500x = 300(30)
500x = 9000
x = 18
300 grams cost 18p
Answer:
A. 6 to 2 and 9 to 3
B. 3 to 2
Step-by-step explanation:
A. You have to find a ratio equivilant to the original (3 to 1). You can do so by multiplying or dividing both numbers in the ratio by the same number. For example 3x2=6 and 1x2=2 so 6 to 2 is and equivilant ratio.
B. You need to find a not equivilant ratio. Therefore, you can leave one number in the ratio the same and change the other one. You leave the 3 but multiply the 1 by 2 to get a new ratio of 3 to 2.
Answer:
Step-by-step explanation:
<h3>Question 12)</h3>
<u>Slope between the points:</u>
- A(a + b, 4m - n) and B(a - b, m + 2n)
<u>Use slope formula:</u>
- Slope = (m + 2n - 4m + n)/(a - b - a - b) =
- (-3m + 3n)/(-2b) =
- (-3)(m - n)/(-2)b
- 1.5(m - n)/b
<h3>Question 13)</h3>
<u>Slope between the points:</u>
- C(3c - d, s + t) and D(c - 2d, s - t)
<u>Use slope formula:</u>
- Slope = (s - t - s - t)/(c - 2d - 3c + d) =
- (-2t)/(-2c - d) =
- (-2)t/(-1)(2c + d)
- 2t/(2c + d)