$a + 9d-( a + 4d )= - 27-(-12)\\\\\therefore a +9d - a-4d = - 27+12\\\\\therefore 5d = - 15\\\\\therefore d = \frac {- 15}{5}\\\\\huge \orange {\boxed {\therefore d = -3}} \\\\$

Substituting d = - 3 in equation (1), we find:

$a + 9\times (-3)= - 27\\\\\therefore a - 27 = - 27\\\\\therefore a = 27- 27\\\\\huge \red {\boxed {\therefore a = 0}}\\\\$

Hence, first term is zero.

3 0

3 years ago

On Saturday, Cannor drives 62 1/4 miles each hour. If he travels 4 hours, how many miles does he travel altogether?

Kisachek [45]

Answer:

he travels 249 miles on saturday

Step-by-step explanation:

62.25 x

1 = 4

you must multiple the distance travled in one hour by the number of hours of driving. In this case 4. This is if he did not change speeds ;)

4 x 62.25 = 249 miles

Hope this helps :) Please mark brainliest if you see fit :)

3 0

3 years ago

Rewrite the radical expression as an expression with a raſional exponent.

Wittaler [7]

Answer:

Step-by-step explanation:

i took the test. are u a flvs student?

6 0

2 years ago

You can buy pens at a rate of $0.75 per pen. How much is it for 400 pens?

seropon [69]

Answer:

300

Step-by-step explanation:

400 X 0.75 = 300

8 0

3 years ago

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