Answer:
-400
Step-by-step explanation:
20 + 14 + 8 + ... + (-70) =
= (-6·1+26)+(-6·2+26)+(-6·3+26)+...+(-6·16+26) =
= -6·(1+2+3+...+16)+26·16 =
= -6·16·17/2+26·16 =
= -6·8·17+26·16 =
= -816+416 =
= -400
There are 625 different 4-digit codes only made with odd numbers.
<h3>
</h3><h3>
How many different combinations can you make?</h3>
To find the total number of combinations, we need to find the number of options for each one of the digits.
There are 4 digits, such that each digit can only be an odd number.
- For the first digit, there are 5 options {1, 3, 5, 7, 9}
- For the second digit, there are 5 options {1, 3, 5, 7, 9}
- For the third digit, there are 5 options {1, 3, 5, 7, 9}
- For the fourth digit, there are 5 options {1, 3, 5, 7, 9}
The total number of different combinations is given by the product between the numbers of options, so we have:
C = 5*5*5*5 = 625.
There are 625 different 4-digit codes only made with odd numbers.
If you want to learn more about combinations:
brainly.com/question/11732255
#SPJ1
The Associative Property of Addition.
To evaluate the value of y if x=7, given that function is such that y=2x^2-3x+3, we shall have:
f(7)=2(7)^2-3(7)+3
f(7)=2(49)-3(7)+3
f(7)=98-21+3
f(7)=80
Hence we conclude that when x=7, y=80
Answer:
The answer is 9
Step-by-step explanation:
When 12 is added to twice a certain number and the result is doubled, the final answer gives 60
