Answer:
7 minutes = 3.5 miles
Step-by-step explanation:
Firstly,you have to divide 10 to 5 then you get 2 mins 1 mile.After that,you must divide 7 to 2 then you get 3.5 miles. Hope this will help you!
1.
Any 3 lines a, b and c intersect and form triangles, in no 2 of them are parallel.
2.
2 lines are parallel only if their slopes are equal.
3.
if the equation of a line l is given in the form y=
mx+t, then m, the coefficient of x, is the slope of that line.
4.
so given lines a, b, c with equations:
if
, then the lines intersect, forming thus a triangle.
5.
let the 3 lines be:
The answers are
a) 245314
b) (k2 + k- 72)/2
a)
Let F(n) denotes the sum of first n natural numbers.
F(n) = (n(n+1))/2
9+10+11+12+13+----------------------+700
F(700) - F(8) = (700*701)/2 - (8*9)/2 = 490628/2 = 245314
b)
9+10+11+-------------------k
F(k) - F(8) = (k(k+1))/2 - (8*9)/2 = (k2 + k- 72)/2
Natural numbers are all positive numbers like 1, 2, 3, 4, and so on. They are the numbers you usually count and they continue till infinity.
Learn more about natural numbers here: brainly.com/question/24672369
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Answer:
Step-by-step explanation:
use a^2+b^2=c^2.
5^2+7^2=c^2
25+49=c^2
sqrt74= 8.6 so side c is about 8 units
Step-by-step explanation:
8×9 = 72 (too big)
8×8 = 64 (too small)
so, the answer for 70/8 = x is between 8 and 9.
therefore, D is the right answer option.