<span>7 - 9 = 2
9 - 11 = 2
You should see that the series just increases by +2
therefore you can figure out what the last four terms are and then add them up one of the last terms given is 21</span>
Answer:
= 4·![S_{\Delta EDC}](https://tex.z-dn.net/?f=S_%7B%5CDelta%20EDC%7D)
Step-by-step explanation:
From the midpoint theorem, which states that the line that a line drawn such that it joins the midpoints of two sides of a triangle, is parallel to the third side of the triangle and is equal to half the length of the third side
Therefore, the lengths of the sides of ΔDEF, drawn by joining the midpoints of ΔABC is equal to half the length of and parallel to the corresponding side of ΔABC
We therefore, have that the corresponding sides of ΔABC and ΔDEF have a common ratio and a pair of sides in each triangle form same angles, therefore;
ΔDEF is similar to ΔABC by Side, Side, Side SSS similarity.
The length of the perimeter of ΔABC,
= 2 × The length of the perimeter of triangle ΔEDC, ![S_{\Delta EDC}](https://tex.z-dn.net/?f=S_%7B%5CDelta%20EDC%7D)
= 2 × ![S_{\Delta EDC}](https://tex.z-dn.net/?f=S_%7B%5CDelta%20EDC%7D)
∴
≠ 4 × ![S_{\Delta EDC}](https://tex.z-dn.net/?f=S_%7B%5CDelta%20EDC%7D)
The statement which is incorrect is therefore;
= 4 ×
.
Answer: B. 233 (rounded)
Step-by-step explanation:
1: 700/6= 166.6
2: 166.6+166.6=233.332
3 round to 233
9514 1404 393
Answer:
x = 12
Step-by-step explanation:
The similarity statement tells you corresponding sides have the same ratio.
AB/BC = FE/EC
x/10 = 6/5
x = 10(6/5)
x = 12
For this case we can make the following rule of three:
1/10 scarf ------> 4/5 hour
x ------------------> 1 hour
Clearing the value of x we have:
x = (1 / (4/5)) * (1/10)
Rewriting we have:
x = (5/4) * (1/10)
x = 5/40
x = 1/8
Answer:
A fraction of a scarf that alison can knit in 1 hour is:
x = 1/8