Answer:
sum of the first 27 terms = -1431
Step-by-step explanation:
<h3>arithmetic series sum of the first n terms formula:</h3>
n = 27 terms
first term, a = 25
common difference, d = 19 - 25 = -6
substitute the values into the formula
9514 1404 393
Answer:
x = -7, x = 9
Step-by-step explanation:
We presume your equation is ...
x² -2x -63 = 0
Factors of -63 that have a sum of -2 are -9 and +7. Then the factored equation is ...
(x -9)(x +7) = 0
Solutions make the factors zero.
x -9 = 0 ⇒ x = 9
x +7 = 0 ⇒ x = -7
The solutions to the quadratic equation are x = -7 and x = 9.
Answer:
first and last is correct
Combine like terms.
2x + 6 + 6x - 1
8x + 5
Answer:
10 cupcakes
Step-by-step explanation:
Add both fractions
2/4 + 3/4 = 5/4
Divide by 1/8 because to find the amount of cupcakes that can be made
5/4 / 1/8
reciprocate 1/8
5/4 * 8 = 40/4
40/4 = 10
Mrs. Edward can make 10 cupcakes