0=1+3+5+7++101 find the sum
without computing

Let

S = 1 + 3 + 5 + ... + 97 + 99 + 101

We can reverse the order of terms to write this as

S = 101 + 99 + 97 + ... + 5 + 3 + 1

Then adding these together gives

2S = (1 + 101) + (3 + 99) + (5 + 97) + ...

2S = 102 + 102 + 102 + ...

where there are 51 copies of 102 on the right side, so

2S = 51 * 102 ==> S = 5202

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

the answer will be b x² +x-1

step-by-step explanation: