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07.06.2021 •
Mathematics
14+ (42 + 7) + 32
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Ответ:
95
Step-by-step explanation:
14 + (42 + 7) + 32
14 + 49 + 32
63 + 32
95
Ответ:
95
Step-by-step explanation:
Let's use BEDMAS to solve this (Brackets, Exponents, Division, Multiplication, Addition, Subtraction)
1. Calculate the brackets.
42 + 7 = 49
2. Add 14 + 49 + 32
14 + 49 + 32 = 95
Have a great summer :)
Ответ:
Part A
Pick any two rows to form (x,y) points. I'll pick the first two rows. Use those two points to find the slope
(x1,y1) = (0,325) and (x2,y2) = (5,400)
m = (y2 - y1)/(x2 - x1)
m = (400 - 325)/(5 - 0)
m = 75/5
m = 15
The slope is 15
Interpretation: The balance is increasing by 15 dollars per day.
The slope of 15/1 means rise = 15 and run = 1. A rise of 15 indicates the balance goes up by 15, which combines with "run = 1" to indicate the day has increased by 1.
=============================================
Part B
Point-Slope form
Plug in m = 15 (found back in part A) along with . You can use any point found in the table, though for me, its just simplest to go with the first row.
So we have,
as a point-slope equation.
-----
Solve for y to get that equation into slope-intercept form
The equation is in slope intercept form y=mx+b where m = 15 is the slope and b = 325 is the y intercept. The y intercept is the starting amount. The y intercept always pairs with x = 0.
-----
Convert the slope-intercept form to standard form Ax+By = C.
It is now in the form Ax+By = C, where
A = 15, B = -1, C = -325
=============================================
Part C
All we do is replace y with g(x) in the slope intercept form.
So y = 15x+325 turns into g(x) = 15x+325
Normally I would use f(x), but the table shows g(x) so I'll go with that instead.
=============================================
Part D
Plug x = 12 into the function found in part C.
The balance after 12 days is 505 dollars.