Doserve the pattern of the following sequence, and then answer question 11
-10, +20, -- 40, +80, a
11.
the value of a is
a. +160
b. -50
c. -70
d. - 160

i think it is

step-by-step explanation:

a formal letter is a letter the you would send to a king

a box 3 3/4 feet long or 4+ feet.

step-by-step explanation:

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form

25.3

step-by-step explanation:

1st step

add 3+6

=9

multipy 9*3

=37