Answer:
450 - 30x
Step-by-step explanation:
Lourdes reads 30 pages in one day
Total pages in book = 450
The number of days is x.
Lourdes reads in x days = number of pages read in one day x number of days
= 30 x
Number of pages left after x days = 450 - 30x
Thus, the number of pages left after x days is 450 - 30 x .
Answer:
Multiplication
Step-by-step explanation:
I think what you're talking about is not a decimal, but a multiplication point:
This dot can donate multiplication when in the middle of two numbers and/or fractions.
But if you're talking about some other point, then I don't know, sorry. :(
B: 3m-5
Because 3 times m equals to 3m, 3 times -3 equals -9, then we have 3m-9+4, 3m-5 because -9+4=-5
Answer:
x=32, y=36, and z=25
Step-by-step explanation:
There are only two sums the equations can all add up to, 67 degrees and 113 degrees. I know that to the equation with x is equal to 67 degrees.
2x+3=67
2x=64 (subtract 3)
x=32 (divide by 2)
Now to find the measurement of the other angle, we subtract 180 and 67 since the measurement of a line is 180 degrees.
180-67=113
The equations of y and z are both equal to 113.
3y+5=113 4z+13=113
3y=108 (subtract 5) 4z=100 (subtract 13)
y=36 (divide by 3) z=25 (divide by 4)
Answer:
Step-by-step explanation:
The trigonometric function secant is the reciprocal of cosine:
For :
(1)
On the other hand, it is known , hence:
(2)
In addition, it is known (3)
Substituting this on (1):
(4)
(5)
(6)
Finally: